What should br the OD rpms be at 70 mpr on my 2004 chevy tahoe 4x4?
That all depends on what package you have on your Tahoe, the low geared differentials will have higher engine RPM's then a higher geared one, my Yukon is turning right at 2 grand at 70 but I have done some wheel and tire size changes and readjusted the sensors accordingly. if you have a light touch with the throttle on the highway you can feel it shift all 4 times, and if your real good you can also feel the torque converter lockup. HTH
Check your build sheet to see what the final drive ratio is.
FoR, You and your math again.
I feel 2300 is acceptable. Count your gear shifts, there will be 4 gears (that means 3 changes). And there is torque converter lockup that happens after 45mph with low throttle. It can feel like a shift. Like they said though, looking up your build sheet or RPO codes will tell you your gear ratio. 3.08's will act very differently than 3.73's
I do like numbers, they don't lie.
Looking for a Used Tahoe in your area?
CarGurus has 32,569 nationwide Tahoe listings starting at $1,500.
Search Chevrolet Tahoe Questions
Chevrolet Tahoe Experts