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?
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03-01-2010
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?
03-01-2010
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
03-01-2010
Make sure to get the sun gear!!
03-01-2010
Take everything related to the final drive, including the output shaft. The 97s are different than 98+.
03-01-2010
Really? Whats the difference?
03-01-2010
97's have a c-clip that actually holds the diff in place. Not sure it that makes the output shaft different.Originally Posted by minichopper6hp
03-01-2010
So does my 99
03-01-2010
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)
03-02-2010
As in pick up a new one?
03-02-2010
I'll remember that when I pull mine out.
Thank you guys for the extra info, BTW! FEED ME MORE!!!!
03-02-2010
He means if you're getting the HD diff make sure it comes with a sun gear because Its a different size then the one you have.
03-02-2010
I'm not getting another one. I'm re-using my stock one. Will that be an issue?
03-02-2010
No. I was saying that you need to use the 3.29 sun gear, not the regals 3.05 sun gear, that is all lol
03-02-2010
Ah. Will do.
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