Transmission mount bolt stripped out - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 03-20-2004, 06:37 AM Thread Starter
 
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Transmission mount bolt stripped out

Hey guys,

I noticed that out of two mounting bolts, the one on the pass side was gone. I pulled the skids and cross member out to check it out. I priced a Heli coil set...TOO MUCH $...
I am trying two methods to repair..the treads are close so I bought the tap and retapped the threads...I'm going to try thread lock and a new bolt first.

If this doesn't work, I bought a 3/8 inch through bolt, nut, and lock washer. There appears to be enough room to put the nut on.

Has anybody had that bolt come out before? Does it just vibrate itself loose or is the torque of the trans ramming it out?

thanks
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post #2 of (permalink) Old 03-20-2004, 09:46 AM
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Re: Transmission mount bolt stripped out

1. Thread lock never hurts.
2. How much was the Helicoil?
3. That's IMHO, the best answer.
4. But heck 3/8" rod/nuts
5. Works for me...
6. But I think your plan is sound....
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post #3 of (permalink) Old 03-20-2004, 12:14 PM Thread Starter
 
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Re: Transmission mount bolt stripped out

Well, after trying to get the cross member and exhaust bracket lined up and then start threading in the already worn hole....I jumped to plan B.

I ended up using the through bolt and lock washer and nut. There is not alot of room in there for wrenching but it looks like it is going to be pretty solid.

Oh Yeah, the pieces that screw in the hole are cheap but the set required to drill, tap and feed was approximately $50...ouch for a one time size hole.....

Thanks
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post #4 of (permalink) Old 03-20-2004, 02:18 PM
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Re: Transmission mount bolt stripped out

If you've got the room, through bolting is a fine way to go. The complete heli coil kits are a little expensive, but there are a few other designs that aren't heli coil brand that work a little different and are a lot cheaper. You can just buy a drill bit and a tap on your own, and you can buy the thread repair insert that threads in with a bolt, no special install tool needed. But nut and bolt sounds pretty easy.
post #5 of (permalink) Old 03-20-2004, 10:07 PM Thread Starter
 
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Re: Transmission mount bolt stripped out

Yeah, took it wheeling tonight....problem fixed. I was hearing a bump sound under heavy torque...like in 4 Lo....I think it was from the trans moving under torque..... [img]images/graemlins/grin.gif[/img]

Nice fix....
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post #6 of (permalink) Old 08-18-2014, 09:33 PM
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Both of the bolts are missing on my 88 XJ. What bolt size do I need to screw into the threads?
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