Originally Posted by Rustic Eagle
I would tend to agree with the older GM 4-speed transmissions (like my '02' 4-speed/4.10).
Thinking out-loud here...., I would think with the newer GM 6-speed transmissions a 3.73 gear would be plenty deep, possibly under some shifting conditions even similar (output ratio) to the old 4-speed/4.10.
I will see if I still have it, but a member over on Articles - GM-Trucks.com - The Ultimate GM Truck and SUV Community - GM-Trucks.com
put together a chart comparing the different gear sets. A 6spd/3.42 combo was actually more like a 4spd/4.10 combo from what I remember.
Originally Posted by WrenZ71
I agree with you the 99 suburban is a 4 speed
The newer 6 speeds don't need as low of gears but in pulling conditions 3:73's would be nice.However gm did away with 3:73's in there 1/2 tons unless you get one with a 6.0 vortec max or 6.2 max trailering package.Im unsure on gearing as far as the 15+ body styles goes.
The 3/4 tons and 1 tons with the 6.0 had options for 3:73's or 4:10's.
The '14- 1500's with the Max Tow got 3.73's with either the 5.3L or the 6.2L motor. For '15, the Max Tow is a 3.73 with the 5.3L, but the 6.2L gets a set of 3.42's since it has the 8spd trans now.
HD's had the choice until the new '15 model came out, which they have only 4.10's now. The '13 had 3.73 standard, 4.10 as an option. '14 had 4.10 standard, with the 3.73's being optional.