GWolfe wrote:
Good to see you back in action ib. Your RPMs sound about right for a 3.73, thats what my 04 Silverado ran with 3.73s. I would always tow in 3rd with T/H on, the 5.3 seemed happy and I would also get better MPGs than trying to lug along in OD.
Truck is looking good BTW, I miss my 04.
Thanks!
And yes, I use 3rd and T/H as well. It'll lug along in OD if conditions are right (flat, no wind), but a GM technician I know says the OD gear and clutch pack in the 4L60E is tiny and weak compared to 3rd, and suggested I always use 3rd.
The truck has 150,000 miles on it (240,000 Km), and although the trans seems to work ok and the fluid is obviously new, I don't know the condition of the trans itself. So, better safe than sorry.
