Recent content by Peewee
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TH400 swap to 4L60E or 4L80E
I do like the idea of just doing a rear end swap. I don't think I have the power to go all the way down to a 3.42 but a 3.73 should drop me a few hundred RPM at 68 to 70 mph. After spending a few hours looking for and reading about the 4L60E's and 80E's it seems one would have to go with a 80E...- Peewee
- Post #4
- Forum: Transmissions
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TH400 swap to 4L60E or 4L80E
Truck: 1989 C2500 5.7 TH400 trans with 4.10 rear end Sitrep: Will need to tow a 20' car hauler all over the midwest this coming summer - about 5500 to 6000 lbs max never more. Question: What would you do? A) leave it alone be happy with 60 mph and 9 mpg. B) Leave TH400 in it and swap out to...- Peewee
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- Replies: 3
- Forum: Transmissions
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