Ive got a gmc s15 pickup with a lq9/ls3 engine with boltons, cam, and nitrous with a th400 and a ford 8.8 rear end. Its more for racing than highway driver but I will still take it some distance a few times like 200+ miles. I want more highway gears but I dont want performance to suffer... im expecting 110 mph in the 1/8th on the spray and who knows in the quarter. Should I run 3.55 highway gears (2 shifts in the 1/8th) or 4.10's and shift 3 times in the 1/8th with my 28" tires? Im pushing more for the 4.10's for the racing but I dont like 3500 rpms on the highway. The truck weighs 2800 lbs without me.

 

To gain one the other will suffer.....for every give there is a take.....ying/yang....however you want to put it.

 

3.55 and spray the **** out of it.

 

Th400, 3 shifts, did I miss something?

 

Im expecting 110 mph on the spray in the 1/8th. 28" tire 1.48 2nd gear is under 110 mph with 4.10 gears. I bought 4.10's so we will see

 

converter should be slipping still in 2nd

 

My C70 dump truck with a 427 big block chevy runs 3500 all day long on the highway.