bartonmd wrote:The AWD sleeve is by far better at making the whole disco stay together, being that the lifted CV angle puts an angle thrust on the gears, which doesn't seem to lend itself to longevity of... anything in the disconnect. The AWD sleeve is not only much stronger, but also keeps the shafts and bearings all in a line, rather than twisting on the bearings.
Having said that, when I went to the AWD sleeve I lost like 1.5-2mpg, so there's that... There actually is quite a difference from spinning the ring/pinion and front prop shaft all the time, even if it is only coasting.
1.5-2mpg? Really that much? Wow/ I typically get, driving around town, 12-14 and on the highway, maybe 20? So I guess its a matter of losing 10% or more mileage, or having a stronger disconnect. BTW, I do have a front strut spacer lift.....and the CV's are clearly near bind at full droop. I havent had issues yet, but if it starts chewing them up.....
Why didnt GM just go with the end of axle (at the hub) disconnect on these trucks? You figure it would get better mileage if NOTHING was turning, and also be easier to service and stronger. Sigh