i just hauled a 62oo lbs. trailer up and over the Sierra nevada mts. 7500 ft. elevation in my 1/2 ton Tahoe no problems up and back just keep it around 60 mph and DON'T use ooverdrive. oh my 98 Tahoe has 255,000 + miles and the trip was 350 mi. each way good luck
U DONT HAVE TOO PULL COVER OFF. JUST CRAWL UNDER TRUCK AND SPIN TIRE 1 REVOLUTION...COUNT HOW MANY TIMES DRIVE SAFT TURNS. JUST APPROX. BUT WORKS 3 1/2 TURNS = 3:50 TO 1 OVER 4 TURNS = 4:11 TO 1 ETC.. ETC
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