3.73->4.56 Regear Results
Regeared my truck a few weeks ago. I thought I would start a thread to let people thinking of doing the same what to expect. I've definitely seen the question asked a few times in the past, and o...
Forum Discussion
BenK wrote:
Thanks...love GMT400's too
When new, the 7.4L would occasionally get +15 MPG and hoping to get that or more after the rebuild. With a 42gallon fuel tank..kidneys would dictate a rest stop before adding to refuel
Key is go have enough torque down low in the RPM curve to take advantage of that 0.5 OD
Not saving anything in money/ROI...just having the ability to choose wnen/where to stop for gas
There is a savings in not spending the kinds of money new vehicles cost these days, and not into LAGs
Plus, with a tuned big block with 5.1's...going to be sooooo much fun !!!
Big block with gears like that would be awesome.
I love the 42G tank. Even towing the camper, a tank of fuel lasts longer than I do.
I plan to add a later model 11 blade fan, or maybe a duramax fan, and a 2 core radiator to address the cooling problems. Maybe a bigger external trans cooler, they have a (pretty much) bolt in model that is about 5" taller than stock. Already have an HD fan clutch.
After that, I will be replacing the exhaust h-pipe. They are extremely restrictive on the 1500 5.7L trucks. 2" pipes with crush bends down to 1 7/8". The 3/4-1 ton 5.7L had 2 3/4" pipes. I think that would help power a bit and help get some exhaust heat out of the engine.
If I ever replace it, it will be with an 8.1L Suburban/Yukon...if I can find one with decent miles that the rockers haven't rusted off of.
