Hello there friend.. I like to pay For advice on my 2001 Yukon Denali 6.0 l .. I need to get some lower gears its 4 wheel drive with a Single speed transfer case I read its 60%Maybe @Dantheman1540 can chime in and answer my question.
Rear powered So it must have a fluid cupling thing inside ,true? Or is it strictly a gearbox ?
Years ago I was a chevy high performance mechanic.. Thanks for your anticipated help Jon