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#Chevrolet transmission ratios how to
#Chevrolet transmission ratios manual
#Chevrolet transmission ratios series

1964–1969 Super Turbine 300 - Buick/ Oldsmobile/ Pontiac (Oldsmobile Jetaway).

1961–1964 Roto Hydramatic - Oldsmobile/ Pontiac (also used by Holden).

1961–1963 Dual Path Turbine Drive - Buick.

1957–1961 Turboglide - Chevrolet (V8 models only, except Corvette).

1968-1971 Torquedrive- Chevrolet ( Camaro and Chevy II, Nova.

1950–1973 Powerglide - Chevrolet (also used by Pontiac, Holden, Vauxhall and Opel).

1940–1967 Hydra-Matic - Oldsmobile (now the trade name for all GM automatic transmissions).

All of GM's early automatic transmissions were replaced by variants of the Turbo-Hydramatic by the 1970s. Through the 1950s, all makers were working on their own automatic transmission, with four more developed inside GM alone. The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. The same warner t16D was available in el caminos with 230, 250 and 307 also, but with floor shift when console was ordered,Īnd the T16D was regeared in el caminso with the 327 and 396 to: 2.41, 1.59, 1.00, and 2.Automatic transmissions Early models The 325hp engine Saginaw three speeds were re-geared to: 2.54, 1.50, 1.00 and 2.63 rev

#Chevrolet transmission ratios series

Warner T16D(used with 396/402 in the 10 and 20 series trucks and is the heaviest three speed tranny used in the trucks): 2.86, 1.72, 1.00, 2.86 revĮl caminos did get the same sm326 with the 230, 250 and 307 only, Std equipment 250 engine(CS models std equipment) synchromesh SM318: 2.94, 1.68, 1.00, rev 3.14 Im sure ther are some details I have forgotten along the way(time is a tough thing) LOL! good luck, crazyL either of these trannies will take a little "spirited street driving behind a sb V8 for quite a few miles, but have less teeth on the input shaft to get the ratios, so are not as strong as the camaro sag /with 2.52 1 st. I ran a 3.11 vega box, but many yrs ago, but dont remember how many grooves the input shaft had. That trans was id'ed by 3 rings around the input shaft. it also ran in my longhorn behind a 355.but only for part of a season(6500 rpm shift to 3rd gear took it out!).

I ran a Monza 4 spd behind a warm 327 in a c10, with 3.73 gears.talk about a screamer with that 3.50 1 st gear. You might also find the lower geared versions on the 4 spd in a 6 cyl camaro(2.85, or possibly 3.11). The spacing on these trannies is a little wide, as compaired to a camaro sag 4 spd, with a 2.52 1st(v8). I beleive the vega also had a sag 3 spd that was a 3.11 1st gear. The cars had some different ratios, but in my travels the 3.11, & the 3.50 were found in a 4 spd saginaw (vega, Monza in that order). some of the BB stick trucks were listed with a 2.52 gear(not a saginaw, but a muncie trans). So, I guess that is why they are saying that they are all the same?Ĭan anyone shed any light on this for me?Īs far as i know the trucks(I6 & v8 sb ) had a 2.85 gear.

#Chevrolet transmission ratios how to

The next question is, how does a person tell these transmissions apart? The places that I have talked to about this, say that they don’t know how to tell these transmissions apart, if there is in fact a difference. I got this information out of the book titled 'Chevy & GMC Pickup Performance Handbook' written by Jim Allen. The gear ratios from a SM-326 transmission from a 350V8 are listed as ġst=2.85, 2nd=1.68, 3rd of course is 1.00. The information that I have has the SM-326 transmission from a 6 with these gear ratios ġst=3.50, 2nd=1.89, 3rd of course is 1.00.

#Chevrolet transmission ratios manual

It seems that all the places that I have contacted about getting a 3-speed manual transmission from a 350V8, say that as far as they know, there is no difference in the gear ratios. I am getting conflicting information regarding the gear ratios of the 3-speed manual transmissions. My concern is that the gear ratios from 1st and 2nd are not conducive to the power curve of the faster turning 350V8. I left in the original 3-speed manual transmission from the six cylinder engine. I recently replaced the 250 six engine in my 1969 Chevy C10 with a 350 V8.