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My tensioner was still working at 150K miles (at least I assumed it was the original when I first looked at it at 98K miles). I did change it at 150K miles (2nd TB change) to be safe. I have heard of aftermarket tensioners failing. I think Sparky experienced that.

IMHO, when you consider the expense of a TB change on these trucks, what's another $100? <img src="/forums/images/graemlins/lol.gif" alt="" /> I say change it and have peace of mind <img src="/forums/images/graemlins/kewl.gif" alt="" />


Yep, dont know what brand aftermarket tensioner failed on my gen1 a few years ago. I was in a field on side of the road 60 miles from home and needed it to run that day. I was not too far from a parts shop so I put in another aftermarket one. Had the tools in the truck to do the job on side of the road. Still good after 3.5 years and thousands of miles.

I just want to tell you both good luck, and we're all counting on you.