June 4, 2007ok i look in glove box and found codes like gu4 and mg5 but let me tell u something i do have slip with all my mods i do make 340 hp with 390 ft trq and this gear what i have right now got 2 go i need to have use for my 1 -2 gear and lol i run 20 psi and STILL RUNNING LEAN
June 4, 2007First gear is a granny gear! you don't need it so don't use it. Use second for your daily driving. Your second isn't too bad.
June 4, 2007Well, you have the NV3500. What do you mean 10 mph in 1st gear? The NV3500 still has a pretty low 1st gear (4.01) compared to the 4L60 (3.06) but it needs to be lower to get you moving and save the clutch. If you think the 3500 is low I'll let you drive mine.
Unless somebody swapped the rear gears, I think you've got a good setup.
If you wind out each gear to 5,000 rpm you will have:
1st - 34 mph
2nd - 58 mph
3rd - 96 mph
June 4, 2007ok so best rear end posi-gear is??342?? 373 or 308
June 4, 2007For your setup I would say 3.73's. You will still have good power and milage. In your other post did you say you were doing 80mph at 2000rpm? What size tires are you running? That's a great highway setup man. leave it alone!