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Old 10-24-2018, 08:19 PM   #8
Mike C
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Join Date: Dec 1999
Location: Austin, TX, USA
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Re: this rear axle stuff is confusing, but I have to go posi

Quote:
Originally Posted by LockDoc View Post
Yes, the 3.73 should work good for you. I run a 3.73 with my LS1/4l60e combo and it works good.....

LockDoc
As LockDoc says, it will work, but the 2.48 first gear combined with the 3.73 gives you a 9.25 overall first gear ratio while his 4L60E with its 3.06 first gear gives him an 11.41 overall first gear ratio. IMO, the 4L80E really needs 4.10 gears to maximize low speed performance, but it suffers on the highway because it only has .75 overdrive instead of .70 of the 4L60E.

The one feature of newer vehicles that makes them performer so well is the much better chosen and implemented gear ratios and transmission speeds. They accelerate like 60's muscle cars and cruise like 70's sedans with 2.56 gears.
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