this was just posted on GM forum
I have a 00 Silverado 1500 Z71 307,000 miles, had 89,000 on it when I bought it thanksgiving 05. Original motor, Reman Jasper 4L60E put in at 282,000 miles This is my Daily driver. I recently put a 6 inch Rough Country NTD lift. I am currently running 285/75/16 (33") tires. Thinking of going to 315/75/16 (35") around the first of the year when it will be time for a new set.
I am currently running factory 3:72 gears in the front and rear diffs. I have been doing some research and it seems the optimal gears for 35" tires would be between 4:11 and 4:56.
A new GM truck will never last this long .. 18yrs and 307K miles..
I have a 00 Silverado 1500 Z71 307,000 miles, had 89,000 on it when I bought it thanksgiving 05. Original motor, Reman Jasper 4L60E put in at 282,000 miles This is my Daily driver. I recently put a 6 inch Rough Country NTD lift. I am currently running 285/75/16 (33") tires. Thinking of going to 315/75/16 (35") around the first of the year when it will be time for a new set.
I am currently running factory 3:72 gears in the front and rear diffs. I have been doing some research and it seems the optimal gears for 35" tires would be between 4:11 and 4:56.
A new GM truck will never last this long .. 18yrs and 307K miles..