Cammed 05 Escalade Ext with 4l80e question
#11
TECH Enthusiast
Either way, I can't imagine the MPG being very good. Even the TBSS with stock 4.10s gets low teens as an average. Slightly better in 2wd models, but only by 1-2. If I were in the OP's position, I'd probably go with 4.10s. His highway pull video made me think he'd appreciate a little shorter gear for the top end, but then again, maybe a 4.56 would be better for the general public.
#12
TECH Enthusiast
With the stock 4L60E converter shifting at 5,500 you will drop down to right at 3,000 rpm give or take a few hundred depending on the torque output at that engine rpm. 4L80Es drop with a stock V6 converter is more like 3,600-3,800 rpm.