Shawn, the bottom line is this:

We're making GOOD torque LOW down in a HEAVY car. We break Pinion shafts, and you don't.

Tell me why? (And no, John Wikoff, SSEi95, and myself are not in the habit of one wheel wonder burnouts). And we're not the only ones. There have been other failures.

You break pinion shafts because you go WOT around corners. Not saying you do this often, it only takes once. If you did it in a straight line, something else should break first. The input shaft or input sprag should go before the diff, with my experience anyways. I know you guys are breaking them, I just don't see how with proper usage they could be breaking like yours are. Yes, your cars are heavier (what do they weigh 3600 or 3700lbs compared to my 3450lb. GP?) and that can definately be a factor in it, but other than that being a cause I think its just improper usage.

In a straight line there should be no reason for there to be any stress on the roll pin.

Shawn

My car was owned by a retired couple before me. Original owners. No local family to abuse their car. I bought it at 65k miles. I do NOT do burnouts in a turn, nor have I ever. Those that know me personally here can vouch for it. I can also tell you J Wikoff doesn't either.

We're not talking improper use, bud. We're talking weakend over time. Mine failed at 110k.

The Units parked behind the Caddy 4.9's seemed to fail at the same rate... I forget weather or not they did damage to the roll pin... But a few of those units were full of metal... and the cheapest rebuild was $2500 :roll:

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Did I say you were doing burnouts during a turn? I don't believe I did. I said going WOT while turning. This could mean a curve on the interstate while your WOT. Anytime you're going WOT you should be going in a straight line, any turning is what causes this to happen, this is what I'm saying.

I would hope you don't do burnouts through corners...