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Gear ratio determination

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Old Dec 17, 2007 | 12:00 PM
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Default Gear ratio determination
Only label I can find on that thing is this. Does it do me any good?

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Old Dec 17, 2007 | 12:01 PM
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take a shot of your RPO sheet on the spare tire cover in the trunk.
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Old Dec 17, 2007 | 12:04 PM
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Not the original trans... x3. That'* why I want to know what gear ratio it is. It seems to be a little more sluggish than previous two transmissions.
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Old Dec 17, 2007 | 12:18 PM
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Originally Posted by putertopia
Not the original trans... x3. That'* why I want to know what gear ratio it is. It seems to be a little more sluggish than previous two transmissions.
x3? that is worse than stock 2004r expectations.

does the n/a 3800 have the 4T60? i was hoping the transmission in the ssei would be somewhat stout.
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Old Dec 17, 2007 | 12:36 PM
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Originally Posted by chris c
Originally Posted by putertopia
Not the original trans... x3. That'* why I want to know what gear ratio it is. It seems to be a little more sluggish than previous two transmissions.
x3? that is worse than stock 2004r expectations.

does the n/a 3800 have the 4T60? i was hoping the transmission in the ssei would be somewhat stout.
x3 ment he'* on trans #3

the N/A haf the 4T60 pre 96. anything 96+ had the 4T65

but there where a number od different gear ratios in the transe for different cars
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Old Dec 17, 2007 | 12:40 PM
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The "7ASW" on your tranny tag denotes 1997 C/H-Body 4T60E with 2.86 gears and 1420 stall torque converter:
http://home.att.net/~subzero350/1997-99_4T60-E.pdf
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Old Dec 17, 2007 | 12:47 PM
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FQ3 - ratio, transaxle, final drive 2.86
FR2 - ratio, transaxle, final drive 2.93
FW2 - ratio, transaxle, final drive 3.06
F17 - ratio, transaxle, final drive 2.84
F79 - ratio, transaxle, final drive 2.97
F83 - ratio, transaxle, final drive 3.05
GX3 - ratio, transaxle, final drive 3.33
Which of these RPO'* is on your spare tire cover? It'll tell you which you should have, if you think it may be messed up.
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Old Dec 17, 2007 | 01:04 PM
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Originally Posted by agrazela
The "7ASW" on your tranny tag denotes 1997 C/H-Body 4T60E with 2.86 gears and 1420 stall torque converter:
http://home.att.net/~subzero350/1997-99_4T60-E.pdf

That is dead on the money

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Old Dec 17, 2007 | 01:31 PM
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Originally Posted by Peterg22000
Originally Posted by chris c
Originally Posted by putertopia
Not the original trans... x3. That'* why I want to know what gear ratio it is. It seems to be a little more sluggish than previous two transmissions.
x3? that is worse than stock 2004r expectations.

does the n/a 3800 have the 4T60? i was hoping the transmission in the ssei would be somewhat stout.
x3 ment he'* on trans #3

the N/A haf the 4T60 pre 96. anything 96+ had the 4T65

but there where a number od different gear ratios in the transe for different cars
i understand and was shocked. hence why i compared it to the 2004r. i guess [never looked into it] that the 4T60 is just a transverse mount 4L60. so basically a 700r4 in transverse trim.

shocked he'd go through 3. that is like 2004r, 42/44re territory.
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Old Dec 17, 2007 | 01:40 PM
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Chris I know what you mean...

The 4T60-E is sort of hard to compare to a 4L60-E...

The 3T40( THM125 ) got a lot of its inners from the Turbo 350 way back when... The 3T40-E is a H*** bent little Transverse trans... Later thaey took a lot of what they learned and developed the THM440-T4, Basicly a larger 3T40 with an added gear... The 440-T4 then was renamed the 4T60, then later the 4T60-E.... The 60-e Is good for moving 6000 Lbs totall weight including the car....


putertopia, My guess is that you have FW2 in the RPO list.... But that trans is 100% 2.86..

Another thing I have to ask, with all of the trans failures did anyone ever flush out the trans cooler in the radiator to make sure that it wasn't plugged up in any manner to cause more failures?

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