You are REALLY gonna be lugging that engine! Your final ratio is gonna be in
the area of 2.40...
| After some thought, I've decided on putting 3.42 gears in my [2-wheel
| drive] '86 Silverado... it has the 700R trans, a 305 ci, and soon; the
| 3.42. Does anyone have a similar set-up, and if so what are your "likes"
| and "dislikes" of this combination?
| Thanks for any help and for your thoughts... GC
it's not that bad... my brother's '93 C1500 has that basic setup..
(4L60E, 305, 3.42) with his 235/75-15's it's not bad at all on the
highway and he gets about 18mpg. of course, I could drop my 88 K2500
in 4 low and rip his frame in half, but that's for another day.
I have a 1999 K1500 with a 5.7 liter and automatic transmission. The gearing
is factory 3:42 and has factory P265/75 R16 tires and have no problems with
lugging the engine. The 5.7 liter has plenty of torque to pull that gear.
The gear now in the truck is a 2.73... it's definitely doing some major
With a 3.42, I'd have slightly more first gear torque than a TH350 with
a 3.73 [typical combination in older Chevy PUs]... slightly less torque
in second and third... and overdrive for highway mileage.
A 3.73 would have more power in third, but would turn almost too much
torque in first... a 3.73 with the 700R's first gear of 3.06 would be
brutal on a little ole 305ci.
Wadda ya think?
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