4T60 ratios and final-drive

[TeeJay3800]

My '90 Cutlass has the 4T60 transaxle with the optional 3.33 final-drive. Can anyone tell me what the ratios are for each gear on this particular transmission? Also, what other final-drives were available on this car and what is gained by the 3.33 upgrade?

[Anonymous]

The only way you could get a better FDR is to swap the gears from a DOHC tranny into yours.

[spaceman]

since you have a 3.33 that means your diff is 3.33 and your cahin ration is a 35/35. you need to get the chain and sprockets from a dohc trans which will have 37/33 ratio. and that will give you 3.73 with your diff

[TeeJay3800]

I'm not looking for a better FDR, just interested in finding out what is gained by my 3.33 FDR over whatever was standard.

[robby1870]

I'm not looking for a better FDR, just interested in finding out what is gained by my 3.33 FDR over whatever was standard.

3.33 was standard for 4T60 as far as I know

[Anonymous]

since you have a 3.33 that means your diff is 3.33 and your cahin ration is a 35/35. you need to get the chain and sprockets from a dohc trans which will have 37/33 ratio. and that will give you 3.73 with your diff

Didnt I just say that?


Anyways, the 3.33 is no better than any other diff.