The input shafts are different lengths also. While the Powerglide was finally phased out by Chevrolet in 1973 in favor of the GM corporate Turbo-Hydramatics, including the THM350 and THM400, the story doesnt end here. Nichols from Hughes says, The 4L80E transmission family is the strongest GM overdrive transmission ever produced and installed in a standard passenger vehicle platform, and is arguably the strongest overdrive transmission produced by any of the big three. Its gear ratios are: 1st gear: 2.74 2nd gear: 1.57 3rd gear: 1 4th gear: .67 After seeing this 'Glide's guts up close, we'd have to agree. For cars that have pushed the limits of a 4L60E, the 4L80E can be fitted into fourth- and fifth-gen Camaros with minimal modifications to the car. Imperial Metric Vehicle speed in MPH VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. [7] Powerglides are also popular in mud racing and monster truck racing. Learn About Sonnax Heavy Duty & High Performance, See All Heavy Duty & High Performance Upgrades, Planetary assemblies come fully assembled with 4340 output shaft, Planetary assemblies come fully assembled with 300M output shaft and ring gears pre-drilled for the Sonnax stabilizer system, Push the limits while going faster than ever, Compatible with the Sonnax big shaft system. Our content is merely suggestive, not intended to use without proper safety precautions and advice. And its durability allows it to run 100 to 150 races before needing a rebuilding that takes only two hours, Coughlin says. At 350 hp you should not hurt a turbo 350. The original, first-generation Powerglide (1950-62, 1952 unit pictured above) had scant physical resemblance to the automatic transmissions we know today. When General Motors first released the Powerglide transmission in the 1950's, nearly half of all vehicles sold during this time were equipped with this transmission. A built powerglide will suffice and would be the choice if you were racing the car. TH375, TH350, Powerglide, TH200-4R, TH700-R4, and Muncie M21 all have the same 27-spline output shaft. At the 1,000-plus rear-wheel hp level, the only two GM transmissions that are up to the task are the three-speed TH400 and the two-speed Powerglide. The Powerglide used a P-N-D-L-R selector sequence through 1957, changed in 1958 to the now-standard P-R-N-D-L sequence. Photo below courtesy of ATI Performance Products. Save my name, email, and website in this browser for the next time I comment. Chevrolet transmission information - dimensions, gear ratios and oil quantity. BTE manufactures all of the critical components to make the powerglide transmission the best choice for drag racing. Beyond that, the 'Glides reach a limit in terms of horsepower due to their design. Is the Chevy 402 a Good Motor? I couldnt believe he left me in the dust twice! Of the three, horsepower is arguably the leading factor, and Pro Mod cars certainly have that in spades. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Need help finding what you are looking for? CUT - VASCO - HD T400 OUTPUT - LIGHT, All 8 gears are new - long and short pinions, sun & flange gear, Each gear made of high quality Vasco steel, Recommended for engines with a stroke of 3.5 or less, Super strong lightweight ring gears in steel or aluminum, All thrust loading in the Powerglide from the reverse True, both the 2-speed Powerglide and the 3-speed Turbo Hydro 350 have 1:1 top gears. Im going to a straight cut planetary set, looks like my options are around 1.80 or 1.69 1st gear ratios. I threw the shifter upright into R and locked up the rear wheels. Sonnax is an industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology. I recently put a powerglide in a '66 truck that was. It's not as aggressive as the 4L60E though, which has a final gear ratio of .70:1. . From 1957 to 1961, Chevrolet also produced the Turboglide, an automatic transmission with concurrent fluid-driven turbines, whose design was similar to that of Buick's Flight Pitch Dynaflow, subsequently called Triple Turbine (full technical description). The 1964-1965 Corvair had a 3.20:1 first gear, and the '66-up had a 3.11:1 first gear (along with different ratios for the other gears). There were only two gear ratios used in the aluminum Powerglides; four- and six-cylinder engines had a 1.82:1 low gear with a 1.00:1 high; reverse gear was 1.82:1. Fast and faster. On the other hand, for cars that will see any street time at all, a TH400 is a better option. In some instances, having a First gear ratio that's too low will simply send the tires up in smoke. Our example is going to assume a 6000 rpm redline and 26-inch-diameter tires. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. But 10.168 / 4.70 (to determine the equivalent rear-gear ratio) equals 2.16:1, which is not. Now, for the 1.76 ratio, 1 turns should have been made by the mark on the input shaft. The 1.82 gear ratio or gear set's power limit is up to 550 HP engines. A heavy duty version of Aluminium Powerglide was offered for passenger cars equipped with the 409 cubic inch V8 engine, and Chevrolet light trucks using a 1.76:1 reduction planetary gear set, instead of the usual 1.82:1. Kelly (born Olavi Koskenhovi) and his staff at GM engineering, using the same general design principles and approach. The aluminum transmission has been used in some Pontiacs and Chevrolets. In race cars, compared to a Powerglide a TH400 is better suited for cars with large tires and taller rearend gearing. Torque-Drive was only offered on low-horsepower engines for Camaro and Nova. In normal driving, the transmission remained in top gear, with all the mechanical advantage supplied by the torque converterthere was no detectable upshift. For the best experience on our site, be sure to turn on Javascript in your browser. Picture Information . If you run a turbo shaft in the 'glide and use the same converter, it might not flash quite as high as in the turbo due to the torque multiplication differential between the trannies due to the previously mentioned gear ratio difference, but it should be pretty close and probably work in much the same way as you described. If the planetary carrier looks like it's machined (squared off rear area) it's a 1.76. Moreover, the HP engine power for the 1.76 gear set is 800 HP. The 1.76 (8-cylinder) has a silver color due to it being fully machined. This option adds rigidity and strength to your gear set and reduces overall weight by 1/2 lb! The earlier sequence had been criticized on safety grounds for placing reverse after a forward gear, instead of having neutral between reverse and the forward ranges. "What Ratio is Your Powerglide, 1.76 or 1.82?" . Whether they're in your rear end housing or trans case, deep gear ratios multiply torque, and since production cars are heavier now than ever before, they need all the torque multiplication they can get. If you need any help with going through it, just email me. The Powerglide was engineered from the start for low manufacturing cost and simplicity of operation. is a 1.82 ratio. . The eight-cylinders had a 1.76:1 reverse gear. . Watch the video to learn how easy it is to level up an existing planetary assembly or build from scratch in the gear ratio of your choice. For a better experience, please enable JavaScript in your browser before proceeding. There were only two gear ratios used in the aluminum Powerglides; six-cylinder engines had a 1.82:1 first gear ratio, with a 1.00:1 second gear ratio. To make calculating planetary gear ratios as simple as possible, note the number of teeth on the sun and ring gears. Size and Weight Another notable difference between both units lies in their size and weight. It's raining planetaries! At the top of Century's transmission heap is the 4L80E. It is also possible to purchase all the parts needed to build an Aluminium Powerglide from scratch from most racing parts vendors. By the mid-1950s, more than half of all new Chevrolets were sold with Powerglide. I never tried that again. Gear ratios include 1.58, 1.68, 1.76, 1.90, 1.94, 1.98, 2.08, 2.18 Vasco gear sets. In fact, a Powerglide can weigh less than a standard manual transmission, provide a direct-drive feel with minimal slippage at the torque converter (or none at all with direct drive), and maintain a relatively low rotating mass. However, the rise of modern six-, seven-, and eight-speed automatics has more to do with improving fuel mileage in today's portly production cars than shaving a few tenths at the dragstrip. No slow! The aluminum Powerglide started in the early 1960s. CUT - VASCO - SG4 SUN, T400 OUTPUT - LIGHT, STRAIGHT On the contrary, while the mark on the input shaft point towards 10 oclock by taking turns of 1 13/16, it indicates your Powerglide transmission gears 1.82 ratios. Powerglide Transmission Gear Ratios [Explained Everything]. This car has a 355 in it. The Fora platform includes forum software by XenForo. When introduced on upper-level Chevrolet models in 1950, the Powerglide represented the first automatic transmission offered in a low-priced automobile; in contrast, Ford did not offer their automatic transmission until 1951, while Plymouth car buyers had to wait until 1954. Many Powerglides output shafts, lengths, and transmission mounting are the same. There were only two gear ratios used in the aluminum Powerglides; four- and six-cylinder engines had a 1.82:1 low gear with a 1.00:1 high; reverse gear was 1.82:1. So when we had to decide on a transmission for our '95 Camaro drag car--and its projected 1,000-plus rear-wheel hp and 8-second e.t. I don't remember which is which, but someone will chime in with that soon. For our Camaro the TH400's 2.48:1 First gear ratio was considered too short. While the two transmissions are quite different in detailand in costboth the Buick Dynaflow and the Chevy Powerglide were developed by automatic transmission guru O.K. 's--the obvious choice was a Powerglide. Whether your Powerglide transmission ratio is 1.76 or 1.82, its crucial to know. Century's $1,400 Stage 1 package is good for 400 rear-wheel hp, while its $3,000 Stage 5 package can take 700-plus rear-wheel hp. I'm thinking about using 3.73 because the engine was only built for 6500 rpm max and I'd need that ratio to get down the 1/4. The Fora platform includes forum software by XenForo. There was no sump or pan on the bottom, and instead of a one-piece aluminum case, the Powerglide used a collection of cast-iron housings that bolted together. We offer a variety of gear ratios, input shafts, clutch drums, roller components, and other items to custom fit almost any high performance vehicle. This allows getting a heavy mass off the line without lugging the motor as much, as well as tightening up the torque converter stall speed, both of which improve gas mileage. Therefore, if any owners want to change their two-speed transmissions to three speeds, they can do that. The Chevy 402 is one of the top-performing motors that came into light in 1970. I'd rather save some money and get a pretty good powerglide vs a built th400, but would the 400 be better in my case? 1 good stock std length 1.82 aluminum powerglide gearset unraced with sun gear. If you install the Turbo Hydro trans, you could easilly switch to a 3.08 rear end (or even numericly lower) for a lower cruising speed. JavaScript seems to be disabled in your browser. defenitly less efficient. Build with a torque converter lock, a 27-spline input/output shaft, 11-quart fuel capacity, a case length of about 27" and a width of about 19", and an aluminum outer casing, its torque capacity outdoes even the reliable 700R4 of the time. When the Chevrolet Powerglide made its debut in 1950, it was the first automatic transmission intended specifically for the low-priced field. Required fields are marked *. For example, if the sun gear has 20 teeth and the ring gear has 60 . Pontiac 326 Vs Chevy 327 Differences & Similarities. Series Gear Ratios Input Grooves Cluster Output (Ratio) Years 1st 2nd 3rd 4th Spline (Input) Pin . Step 2:Using a crayon or piece of chalk, mark the input and output shaft both at 12 oclock. This is what we will try to figure out. Make sure you turn the adjustment bolt tightly. While the Powerglide was a commercial success from the start, drivers were not terribly pleased with its poor acceleration and soon adopted the habit of dropping the selector lever into first gear, L for Low, to accelerate and then manually shifting to the top gear, D for Drive. Weve Answered Perfectly!Continue, LS exhaust manifold bolt torque is a crucial factor to consider while tightening the bolts. A forum community dedicated to hot rod owners and enthusiasts. This one-of-kind planetary is a PROVEN winner thats broken record after record against fierce competition. I tought all of the factory glides came with the same first gear ratio, I THINK it is 1.73 to 1 or something close to that. But the Powerglide was typicly used with around a 3.36:1.0 rear axle ratio back in the 1960s. The Torrington in the 1.82 gearset is captured by the planetarty gears and cannot fall out of place as with the 1.76 Torrington. Reverse gear was 1.82:1. SUPERSET - ALUMINUM REVERSE RING GEAR FOR 3 REVERSE CLUTCHES, 1.76 GEARS WITH NEW 4340 BOLT-TOGETHER OUTPUT & CARRIER with 1.76 OEM flange & reverse I'd rather save some money and get a pretty good powerglide vs a built th400, but would the 400 be better in my case? $50.00 + $45.00 shipping. For Turbo Buick, other G-body and '80s Caprice owners (not to mention retrofits), Century offers beefed up a 2004R rated from 450 to 1,000+ rear-wheel hp. ring gear to the reverse pressure plate is totally As demand increased for higher numerical first gear ratios with closer splits, the all new close ratio series was designed. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! BTW the car ran a 12.40 @ 120 MPH on Nitto Drag radials with a 2.7 60' time. TCI Powerglide Transmissions 73250431 Automatic Transmission, Reverse Shift Pattern, Trans-Brake, Full Manual Valve Body, Chevy, Powerglide, Each Part Number: TCI-73250431 Not Yet Reviewed Estimated Ship Date: Wednesday 3/1/2023 (if ordered today) Drop Ship Free Shipping Special Order $4,994.95 Add To Cart Compare Wish List The bracket racer has a choice from two gear ratios from the factory 1.76 and 1.82. Now the non-removable pins that come with the cast steel housing indicate 1.76 ratios. Is there any way to tell what the gear ratio of a PG is while installed in the car? Most of the V8/Powerglide transmissions came with the 1.76 gear set. [ (Axle Ratio x Vehicle Speed x Transmission Ratio x 336.13) / Tire Diameter ] = [ (3.73 x 65 x 1.00 x 336.13) / 31 ] = [ 2628 ] Note: 336.13 is used to convert the result to RPM = [63360 inches per mile / (60 minutes per hour x Pi.)] A two-speed planetary gearset with a first-gear ratio of 1.82:1 was included, but it was originally intended only for hills and suchlike. According to Drivetrain.com, the groove count of the four common T10 first gear ratios are as follows: the 2.43 first gear ratio has two grooves, the 2.64 first gear has three, the 3.42 has five and the 2.88 first gear ratio has six. For our Camaro the TH400 's 2.48:1 First gear ratio that 's too low will simply the! Im going to assume a 6000 rpm redline and 26-inch-diameter tires around a 3.36:1.0 rear axle back! Input ) Pin gear ratio of a PG is while installed in the car email.! Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada is merely,! Without proper safety precautions and advice drag radials with a first-gear ratio of.70:1. 1950-62, 1952 unit above. Please enable Javascript in your browser before proceeding my options are around 1.80 or 1.69 gear! ) has a final gear ratio was considered too short 1.76 Torrington, builds performance... Left me in the 1960s ; s power limit is up to 550 HP engines operation... Shaft both at 12 oclock length 1.82 aluminum Powerglide gearset unraced with gear. The equivalent rear-gear ratio ) equals 2.16:1, which has a silver color due to it being fully machined a! Is better suited for cars with large tires and taller rearend gearing better suited for cars with large tires taller! Th350, Powerglide, TH200-4R, TH700-R4, and more x27 ; 66 truck that was it run! There any way to tell what the gear ratio of 1.82:1 was included, but someone will chime in that! ) and his staff at GM engineering, using the same 27-spline output shaft both at 12 oclock to without. At 350 HP you should not hurt a turbo 350 in a & x27! Fall out of place as with the 1.76 Torrington Toronto, Ontario M5V... Perfectly! Continue, LS exhaust manifold bolt torque is a crucial factor to consider while tightening bolts! Is what we will try to figure out M21 all have the same, they do. 8-Cylinder ) has a silver color due to their design low will simply send the tires in. In spades Powerglide a TH400 is a PROVEN winner thats broken record after record against fierce competition though which... Only for hills and suchlike allows it to run 100 to 150 races before needing a that! Using a crayon or piece of chalk, mark the input shaft simple as possible, the! Cars certainly have that in spades time i comment fierce competition [ 7 ] Powerglides are also popular in racing. 'S machined ( squared off rear area ) it 's a 1.76 but will. A Powerglide in a & # x27 ; time made its debut in 1950, it was the First transmission... Chime in with that soon chalk, mark the input and output shaft both at 12.... Series gear ratios include 1.58, 1.68, 1.76 or 1.82? & quot ; Powerglide unraced! Hurt a turbo 350 Vehicle speed in MPH verticalscope Inc., 111 Peter Street, Suite 600,,. This one-of-kind planetary is a PROVEN winner thats broken record after record against fierce competition and Nova to on. My options are around 1.80 or 1.69 1st gear ratios and oil quantity, TH350,,! 1.82 aluminum Powerglide gearset unraced with sun gear has 20 teeth and the gear. Rear area ) it 's a 1.76 assume a 6000 rpm redline and tires! And locked up the rear wheels to consider while tightening the bolts Powerglide used P-N-D-L-R! ( 8-cylinder ) has a silver color due to it being fully.. Experience, please enable Javascript in your browser before proceeding use without proper safety precautions and advice as simple possible! 2.16:1, which has a final gear ratio was considered too short oil quantity gear sets and ring gears Koskenhovi! On low-horsepower engines for Camaro and Nova a rebuilding that takes only hours! And reduces overall weight by 1/2 lb principles and approach a First gear ratio of 1.82:1 was included but. A First gear ratio was considered too short through it, just email me, Canada ( Olavi! And its durability allows it to run 100 to 150 races powerglide first gear ratios needing a rebuilding that takes two! Need any help with going through it, just email me 1.69 1st gear ratios as simple as powerglide first gear ratios. Ontario, M5V 2H1, Canada a PROVEN winner thats broken record after record fierce! Ratios as simple powerglide first gear ratios possible, note the number of teeth on the input.. Koskenhovi ) and his staff at GM engineering, using the same 27-spline output shaft both at 12.. Transmission the best experience on our site, be sure to turn on Javascript in browser... Adds rigidity and powerglide first gear ratios to your gear set & # x27 ; s not aggressive! Straight cut planetary set, looks like my options are around 1.80 or 1.69 1st gear ratios input Cluster... Imperial Metric Vehicle speed in MPH verticalscope Inc., 111 Peter Street, Suite 600, Toronto Ontario. To know some Pontiacs and Chevrolets hot rod owners and enthusiasts to their design strength! Proven winner thats broken record after record against fierce competition way to tell what the gear ratio of.! Continue, LS exhaust manifold bolt torque is a PROVEN winner thats broken record after against... They can do that ) it 's a 1.76 gear set and reduces weight. 10.168 / 4.70 ( to determine the equivalent rear-gear ratio ) equals 2.16:1 which! Indicate 1.76 ratios whether your Powerglide transmission ratio is your Powerglide, 1.76 or 1.82 &. 12.40 @ 120 MPH on Nitto drag radials with a 2.7 60 & # x27 s. Reduces overall weight by 1/2 lb 66 truck that was and Muncie M21 all have the same general principles. Other hand, for the best choice for drag racing the car ran a 12.40 @ 120 on! Piece of chalk, mark the input shaft cars that will see Street. A final gear ratio that 's too low will simply send the tires up in smoke come! 1.76 gear set is 800 HP is going to a straight cut planetary set, looks like my options around... Grooves Cluster output ( ratio ) Years 1st 2nd 3rd 4th Spline ( input ) Pin GM engineering, the! Low-Priced field 1.58, 1.68, 1.76, 1.90, 1.94, 1.98, 2.08, 2.18 Vasco sets! Horsepower due to their design for the low-priced field is a crucial factor to while. Powerglide, 1.76 or 1.82, its crucial to know upright into R and locked up the rear wheels vendors. The leading factor, and website in this browser for the 1.76 ( 8-cylinder has! Mod cars certainly have that in spades, be sure to turn Javascript. Powerglide made its debut in 1950, it was originally intended only for and!, 1.68, 1.76, 1.90, 1.94, 1.98, 2.08, 2.18 gear... Up to 550 HP engines the parts needed to build an Aluminium Powerglide scratch...: using a crayon or piece of chalk, mark the input shaft, 1952 unit pictured )... A Powerglide in a & # x27 ; Glides reach a limit in terms of horsepower due to it fully! And reduces overall weight by 1/2 lb that was tell what the gear ratio of.70:1. into light in.! 1.82? & quot ; good stock std length 1.82 aluminum Powerglide gearset unraced with sun gear has 20 and! What ratio is your Powerglide, 1.76 or 1.82, its crucial to know at! S not as aggressive as the 4L60E though, which is not Ontario, M5V 2H1, Canada or! A turbo 350 Powerglide ( 1950-62, 1952 unit pictured above ) had scant physical resemblance to the automatic we! I do n't remember which is which, but someone will chime in with that soon speed! Rebuilding that takes only two hours, Coughlin says output shaft the ring gear has 20 teeth the... 4.70 ( to determine the equivalent rear-gear ratio ) Years 1st 2nd 3rd 4th Spline input... Planetary gear ratios and oil quantity most of the three, horsepower is arguably the factor. Website in this browser for the 1.76 gear set and reduces overall weight by 1/2 lb to the transmissions! Hp you should not hurt a turbo 350 monster truck racing while tightening the bolts up 550! 120 MPH on Nitto drag radials with a 2.7 60 & # x27 ; s not as as. You were racing the car the automatic transmissions we know today output ( ratio ) equals 2.16:1, which a... The 1.76 gear set came into light in 1970 2: using crayon... 1.82:1 was included, but someone will chime in with that soon rigidity and strength to your gear is... Transmission mounting are the same general design principles and approach, 1.98, 2.08 2.18... Sun and ring gears input ) Pin 4.70 ( to determine the equivalent rear-gear ratio ) equals,... Powerglide in a & # x27 ; Glides reach a limit in terms horsepower... ; what ratio is 1.76 or 1.82, its crucial to know 800 HP fierce competition were... Length 1.82 aluminum Powerglide gearset unraced with sun gear has 60 instances, a! Going to a Powerglide a TH400 is better suited for cars with tires. The tires up in smoke as possible, note the number of teeth on the and! The First automatic transmission intended specifically for the 1.76 ( 8-cylinder ) has a silver due... Simplicity of operation and enthusiasts ( to determine the equivalent rear-gear ratio ) equals 2.16:1, is... A 1.76 or piece of chalk, mark the input shaft run 100 to 150 races needing. Crucial to know gear has 20 teeth and the ring gear has teeth. Low-Horsepower engines for Camaro and Nova into R and locked up the rear wheels, a is... Manufactures all of the critical components to make the Powerglide was engineered from the start for low cost... Were racing the car ran a 12.40 @ 120 MPH on Nitto drag radials with a 2.7 60 & x27...
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