redfishsc
Tired of fixing lousy engineering.
So I discovered the other day that my speedometer is not accurate on this 1999 K 1500 Suburban. It is incrementally worse the faster I go. I can compare it to a GPS speedometer on several different devices, and it's definitely not right.
Truck originally had 3.42 based on the gu6 rpo code.
I realize it could be a faulty vss but I suspect that the gear ratio is different than factory.
I also suspect this because the rear gear hums at around 45mph, very much like ive heard on other DIY gear swaps with cheap gears.
So i took some numbers today. In 3rd gear, I'm going 48mph (GPS) at 2000rpm. 60mph at 2400, 70mph at 3000. This matches almost precisely with what some online calculators say I should have with 3.73 gears. I have stock 245 75r16 (garbage Walmart "grantland" crap).
I don't know a whole lot about the history, the friends that I got this from had got the truck from an impound lot a couple of years ago.
So how can I tell if the FRONT has been changed? I have driven this is 4wd during the snow we had, and it seemed just fine.... but could this truck (Autotrac equipped) absorb the mismatched rpm via the clutch pack in the Autotrac transfer case?
Truck originally had 3.42 based on the gu6 rpo code.
I realize it could be a faulty vss but I suspect that the gear ratio is different than factory.
I also suspect this because the rear gear hums at around 45mph, very much like ive heard on other DIY gear swaps with cheap gears.
So i took some numbers today. In 3rd gear, I'm going 48mph (GPS) at 2000rpm. 60mph at 2400, 70mph at 3000. This matches almost precisely with what some online calculators say I should have with 3.73 gears. I have stock 245 75r16 (garbage Walmart "grantland" crap).
I don't know a whole lot about the history, the friends that I got this from had got the truck from an impound lot a couple of years ago.
So how can I tell if the FRONT has been changed? I have driven this is 4wd during the snow we had, and it seemed just fine.... but could this truck (Autotrac equipped) absorb the mismatched rpm via the clutch pack in the Autotrac transfer case?