Quote:
Originally Posted by Mike C
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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I was hesitant to answer his question not knowing anything about the 4l80 trans. That difference would pretty much make the 3.73 a no-go for that transmission. I originally had a 3.08 behind the 4l60e in my Panel Truck and that did not work for me. It made the transmission overheat when it was in OD. Thanks for the clarification. I will keep that in mind in the future.
LockDoc