Stripped bolt hole for transfer case on transmission

[ErikTande]

One of these bolts on my transfer case is stripped, I must have over tightened it. Can I drill, tap and helicoil these without any issues? There's no oil / fluid passage there, right? I circled both because i don't remember which one I stripped.

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[PLDSM]

I have done this many times. Have done both the helicoil method as well as welding and tapping. If you do weld and tap ensure your dead on center so you don't have any issues with bolting in the transfer case.

 

[red_devil]

Mine are all helicoiled as it provides a more reliable and stronger thread. Just make sure they are straight.

 

[greddy_1700]

I did this before also. I couldn't get the proper size helicoil for over a week and needed the car running, so I tapped the hole in the next larger size in Imperial course thread and put in a new grade 10 bolt. Just another option if you cant find the right size kit locally.

 

[Mello]

My first choice would be Helicoils if the holes aren't oversized too much so the Helicoils won't fit poroper. I would also Helicoil all the holes while fixing the stripped holes as well. My opinion is all threaded holes in aluminum should have Helicoils. If you have the resources make yourself a drilling guide block to help keep the drill straight.

 

[AWD-Tony]

One of mine had a helicoil in it and I’ve had the tcase in and off several times without issues

 

[ErikTande]

My first choice would be Helicoils if the holes aren't oversized too much so the Helicoils won't fit poroper. I would also Helicoil all the holes while fixing the stripped holes as well. My opinion is all threaded holes in aluminum should have Helicoils. If you have the resources make yourself a drilling guide block to help keep the drill straight.

Good tip, thanks!

 

[spoolnmotorsports]

Heli coil it, it will be fine. As stated, just make sure its straight.