Pinion shaft lock bolt
#1
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Car: 85 Camaro
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Pinion shaft lock bolt
On two of the three 10-bolts I've disassembled in my lifetime, the pinion shaft lock bolt has been broken off near the end of the threads on the bolt.
Why do they do this?
I don't think there would be much force on them...
Why do they do this?
I don't think there would be much force on them...
#2
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Re: Pinion shaft lock bolt
just some a-hole putting way to much torque on a little bolt, whether its from the factory or a previous owner.
#3
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Re: Pinion shaft lock bolt
I don't think that's what caused it, by saying broken off at the end of the threads I don't mean the end that meats the head, but the end that is in the middle of the bolt. I considered that, but I don't think that would break it in the middle of the bolt.
Has anyone else seen what I'm talking about, or do I just have really bad luck?
Has anyone else seen what I'm talking about, or do I just have really bad luck?
#5
Re: Pinion shaft lock bolt
The bolt breaks from the cross shaft moving around and hammering on it. Most of the time the bolt has a lot of clearance in the hole and the shaft can move a lot. Each time you turn a corner the pinion gears cause the shaft to rotate on the bolt. Sometimes it might hit harder than others. If you look at most bolts that are not broke you will see wear on them. For some reason the 8.5 and 7.5 10 bolt rear ends break more bolts than the old 8.2 and 12 bolt. There is a special tool that is made for removing these broken bolts. I think Mac or Matco has it. I have a link to it on my other computer, but it's broke right now.
#6
Re: Pinion shaft lock bolt
The bolt breaks from the cross shaft moving around and hammering on it. Most of the time the bolt has a lot of clearance in the hole and the shaft can move a lot. Each time you turn a corner the pinion gears cause the shaft to rotate on the bolt. Sometimes it might hit harder than others. If you look at most bolts that are not broke you will see wear on them. For some reason the 8.5 and 7.5 10 bolt rear ends break more bolts than the old 8.2 and 12 bolt. There is a special tool that is made for removing these broken bolts. I think Mac or Matco has it. I have a link to it on my other computer, but it's broke right now.
Thanks,
Mark
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#8
Re: Pinion shaft lock bolt
There's about 1/4" of the tip with a few threads left on it of the lock bolt still down inside the carrier. I tried a pick but can't get it to budge. I read to grind into the pin, past the bolt and push the pin out, but I don't want to do any more damage than I have to.
#10
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#12
Re: Pinion shaft lock bolt
Appreciate all the help,
Mark
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Re: Pinion shaft lock bolt
Of the two broken bolts that I've had to remove, one just pulled out with a magnet, since it had broken off after the threads, and the other I was able to spin out with a pick, it broke off with about one thread.
I'll accept that explanation. Thanks everyone!
I'll order that tool next time I plan on disassembling a 10-bolt, the one I had to back out with a pick took about 2 hours.
The bolt breaks from the cross shaft moving around and hammering on it. Most of the time the bolt has a lot of clearance in the hole and the shaft can move a lot. Each time you turn a corner the pinion gears cause the shaft to rotate on the bolt. Sometimes it might hit harder than others. If you look at most bolts that are not broke you will see wear on them. For some reason the 8.5 and 7.5 10 bolt rear ends break more bolts than the old 8.2 and 12 bolt.
I'll order that tool next time I plan on disassembling a 10-bolt, the one I had to back out with a pick took about 2 hours.
#14
Re: Pinion shaft lock bolt
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