Helicoil Transfer Case (1 Viewer)

[tcarlson78]

Greetings,
Hopefully a quick question for you all. I am leaking oil out of my TC because I over torqued and stripped the threads on a bolt. Given my other modifications the TC is mounted to the frame with an adaptor that replaces the rear "cone". I think it should be an easy fix by drilling and inserting a helicoil or simular product. I am mostly sure there is enough material to be able to drill and tap for this but I have to check again.

So here is my question.

Before I dig into this project, and occupy our single garage for a few days. Is a helicoil the right way to go for this repair? Is there another product? I hope to do this without removing the TC. Is this possible?

Thanks for your assistance.

 

[Blue77FJ40]

Not sure where on the tcase you're referring to, but timesert is a far better product.

 

[tcarlson78]

Top rear of the tcase. To the upper left of the rear output. Where can you get the timesert product?

 

[bsilva132]

If there is room for a helicoil, why not just upsize that bolt and ream out the rear mount hole? You are already reaming and tapping the hole 1 size larger to install the helicoil.

 

[Blue77FJ40]

Top rear of the tcase. To the upper left of the rear output. Where can you get the timesert product?

Many places. Have you tried putting timesert in google?

 

[tcarlson78]

I did google, and found a vendor in my town. My bad for asking before looking.

I am hoping that with a insert secured in the hole I can achieve a stronger thread and avoid problem with the two metals as an insurance against my own ability to mess things up.

 

[Blue77FJ40]

I bought an M12 x 1.25 kit and was impressed with the product. Their website is very informative. I have a great propensity for messing things up (timesert is a big hint) but once installed per instructions, the insert will work fine. Helicoils have a history of reversing out. These won't.

 

[inkpot]

Howdy! If your going to drill out the hole for a larger size for an insert, just drill and tap it for the next size up. The case is aluminum and very easy to work. I have used the AA transfer case mount and had the same problem with threads failing. Not that hard to repair on the rig. John

 

[tcarlson78]

If I drill and tap the aluminum, my concern is that I will cause weakness in the tcase, the timesert or simular product should help recover some structural strength, right? How much material do I have to work with there? Its been a while since I was up close and personal with my tcase. My questions are from a planing ahead aspect right now. Don't worry, the aww shucks, now what? posts will follow soon enough.

 

[inkpot]

If I drill and tap the aluminum, my concern is that I will cause weakness in the tcase, the timesert or simular product should help recover some structural strength, right? How much material do I have to work with there? Its been a while since I was up close and personal with my tcase. My questions are from a planing ahead aspect right now. Don't worry, the aww shucks, now what? posts will follow soon enough.

That 6 bolt flange on the back of the transfer case was originally designed to support a pto and/ or overdrive unit. It's pretty heavy and thick. I'm sure that I'm not the only guy that has drilled and tapped up a size on one of these, but so far I have never heard of anyone having structural failure from it. Good luck either way. It's always fun to work overhead with a drill. John