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Re: this rear axle stuff is confusing, but I have to go posi
Quote:
Originally Posted by LockDoc
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
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I was not implying you were wrong just that he might want to think about his final application. You were absolutely right that it would work, and it would be a BIG improvement over a 3 speed trans. The 4L80E has the same first 3 gears as a TH400 plus a .75 overdrive. The big drawback to the 4L80 IMO is the expensive electronic controller required to run it.
These trucks came with 3.08 and the TH400 so the 3.73 would be a big improvement compared to the 6.776 ratio in first gear that application has!
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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