ATX trans pan

[cobrakidd03]

I changed my ATX pan gasket and there are 3 bolts that are stripped. How can I fix them or get new ones??

 

[hawkeye18]

If it's the bolts, get new bolts. If it's the bolt holes, get an appropriate tap and tap new holes in.

Edit: Take one of the old bolts to AAP for size identification, but I'd be willing to be they're M8x1.25x20mm.

 

[cobrakidd03]

Thanks. I am pretty sure it is the bolt holes that are the problem.

 

[SHOtimer]

I think you will have to pull the pan again and properly repair the threads in the tranny.

I learned many years ago - that those aluminum transmissions are very soft and not to torque those bolts too hard....

Doug

 

[cobrakidd03]

Ya I guess I found that out also. Now what do I need to get in order to repair them? This is first so I am clueless

 

[byersmith]

Ya I guess I found that out also. Now what do I need to get in order to repair them? This is first so I am clueless

A metric tap and die set and replacement bolts if you chewed any up trying to cross thread them in the case. torque for the bolts is probably around 10-12 ft/lbs dont quote me on that tho.

Byersmith

 

[cobrakidd03]

where can i get a metric tap set at? do they have specific one for diffrent bolt sizes?

 

[byersmith]

where can i get a metric tap set at? do they have specific one for diffrent bolt sizes?

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=39384

And you can use that fancy tap set you just bought to fix your bad bolts. Just take a good bolt from the pan and try to match it to the appropriate tap. It should thread correctly (tight with no wobble and no force needed). Now use the tool inside with your tap and pop those suckers in a vise and re-tap. As for the pan just make sure you are using the correct thread pitch as you already should have identified with a good bolt, get the tap in the bad hole(s) and make sure its straight on with the hole and turn it (but not to far and do not force) as you may crack the case.

Byersmith

 

[SHOZ123]

Use a 1/4-28 bolt. It is just slightly larger so you don't even need to tap it. I used SS bolts and just let them cut the threads.

 

[cobrakidd03]

Use a 1/4-28 bolt. It is just slightly larger so you don't even need to tap it. I used SS bolts and just let them cut the threads.

Is that a good idea? where can I get these bolts?

 

[SHOZ123]

It works. Otherwise you are going to have to put helicoils in it.

The 1/4-28 bolt is a fine threaded size. Mcmaster.com has them in stainless steel. Grade 8 would work too.

 

[cobrakidd03]

Thanks everyone!!! I will try the larger bolt size.