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What will my final drive ratio be?

DanGTP

DanGTP

New member
I'm grabbing a trans from a 98 NA Regal. I know the final drive as-is is 3.05:1 What will it be if I replace the differential with my stock HD one? 3.29:1?
 


You are correct. By replacing with your HD diff you will have a 3.29 fdr. With grand prix's it's easy, you either have 2.93 or 3.29 based on the sprockets on the drive chain. With regals and impala's they have the same 1:1 ratio sprockets as grand prix gt's but they use a diff with a different size sun and planetary gears to get 3.05
 
Take everything related to the final drive, including the output shaft. The 97s are different than 98+.
 


There are two types of clips, one that requires the diff be popped off the output shaft like an axle out of the tranny (98-08), and a c-clip that must be removed first to pull the diff off the output shaft (97)
 
OH4CompG said:
There are two types of clips, one that requires the diff be popped off the output shaft like an axle out of the tranny (98-08), and a c-clip that must be removed first to pull the diff off the output shaft (97)
Click to expand...

I'll remember that when I pull mine out.

Thank you guys for the extra info, BTW! FEED ME MORE!!!!
 


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