[truckramrod]

I have a 95 Sonoma ext cab 4.3 tbi 5 spd with 3.08s, would it be a good idea to swap in 3.73s from my 98. My truck does 3500 rpms at 95mph in 5th. That means that it would be taching roughly 4250 at 95 mph with 3.73s. The problem is that I like to cruise between 70-80 on the highway. Should I just try to get 3.42s?

 

[MuddyS10]

i had 3.73's in my ZR2 and she did fine on the highway, i had her up to 95 numerous times and never a problem, and with cruise set at 75, i think she tach'd somewhere about 2200 rpm's. that was an auto tho.

 

[truckramrod]

Well, I read somewhere that the manual has 8% less overdrive. I am guessing less than the auto.

 

[Twin-10s]

i changed out my 3.08's for 3.42's nice improvment imo.
3.73 with a 5 speed will be real quick off the line,but i think it will be to much. 1st gear would be just about useless imo.

 

[MKR]

in a zr2, 3.73's are not quite even enough, manual or auto. they also have 31 inch tall tires. a normal 2wd truck though has around a 26 inch tall tire and a 3.73 gear would really be winding during normal highway driving. i'd recomend no more than a 3.42 gear for a daily driven truck with an m5 in a 2wd.

 

[MINTSICK]

in a zr2, 3.73's are not quite even enough, manual or auto. they also have 31 inch tall tires. a normal 2wd truck though has around a 26 inch tall tire and a 3.73 gear would really be winding during normal highway driving. i'd recomend no more than a 3.42 gear for a daily driven truck with an m5 in a 2wd.

Exactly, my dad's zr2 is a 5spd 3.73 and it needs more gearing if you ask me, but my truck is a 2wd 5spd 3.08, I already have a set of 3.42's waiting at home and just ordered the rebuild kit last night, I can't wait to feel the difference.