Home Forums Gear Hunting Trucks and Four-Wheel Drives diesel trucks

I dont think you can beat the Allison tranny. I have one in my 05 GMC diesel with 283,000 mi. and no problems yet. I change oil and filter with AMsoil Totque drive about every 50,000 mi. and no problems . My engine runs perfect . I get 19 mpg and about 15 mpg towing my double axle with tractor and concrete in it . The towing is about 7,000 lbs , so 15 mpg is pretty good. I have yet to replace a front end part or an engine part. I did need a transfer case rebuild @ 158,000 , a fuel cooler and some wire harness and break lines so far.