Bonehead mistake

Hey guys. I was having a nice morning working on the truck replacing the transmission filter which seemed simple enough. All was going well until I misread the TM torque for the bolt that holds the filter as ft/lbs instead of in/lbs and sheared off the bolt. I tried a reverse twist bit to get it out, but had no luck. I did not drill all the way through the bolt or with a big enough bit to hit the threads because I did not want to totally screw myself. I feeling pissed off and like a total idiot, I decided to stop and see if any of you had any advice for me before make things worse. Any advice is appreciated.

Since you drilled try a easy-out .

https://www.youtube.com/watch?v=cUWWUGGjLq0

For bolts broken by overtightening I've had good luck with useing a sharp center punch and a hammer, place punch near threads and tap at an angle in a counter clock wise direction. I've also had good luck useing a LEFT hand drill bit, it will usaully grab the bolt and unscrew it.

n8roro said:

Hey guys. I was having a nice morning working on the truck replacing the transmission filter which seemed simple enough. All was going well until I misread the TM torque for the bolt that holds the filter as ft/lbs instead of in/lbs and sheared off the bolt. I tried a reverse twist bit to get it out, but had no luck. I did not drill all the way through the bolt or with a big enough bit to hit the threads because I did not want to totally screw myself. I feeling pissed off and like a total idiot, I decided to stop and see if any of you had any advice for me before make things worse. Any advice is appreciated.

Click to expand...

nyoffroad said:

For bolts broken by overtightening I've had good luck with useing a sharp center punch and a hammer, place punch near threads and tap at an angle in a counter clock wise direction. I've also had good luck useing a LEFT hand drill bit, it will usaully grab the bolt and unscrew it.

Click to expand...

He tried that.

Here's how screwed I am

I'm looking for the easy out. Advance only had 3/8" which is too big.

n8roro said:

I'm looking for the easy out. Advance only had 3/8" which is too big.

Click to expand...

Do you got any farm stores or a NAPA ?

Here is the bolt:


You can see it mushroomed near the threads from me being a dumb gorilla.

NAPA has none in stock either.

It might be easier to pull the valve body and work at on the bench.

Grind up a 4 square machinist tool bit with one cuttin edge
Does Not have be big

................even 1/4" will do.
Drill hole in middle of the bolt IN THE MIDDLE OF IT, and slam in your new "toolbit"
and the square drive will give good wrench hold.
Use a square drive socket on ratchet , torque unlimited.
Screw extractors are for little kids screws. You need the torque.

Like this?

The bolt is 1/4" so the square part of the tool is 1/8"

Thanks for your help guys!

This is a horrible picture of a commercially available extractor tool. Try to copy this, taper it like the tool. Also, don't get too greedy when grinding it, you want to cool it often and not destroy the original heat treating.

I would make the tip whatever size the drill was that you used divided by 1.414 (sqrt of 2), and taper up from there. Drive it in and give it a twist...


EDIT- 1 minute too late! Glad you got it out!

I got it out with the home made version!

I have a couple more questions:

Is the bolt supposed to be long enough so that the filter is loose?

Any one know the part # of that bolt?

I'm going to try to match it at the hardware store now and see how that goes.

Thanks again for all the help.

Google, "th400 filter bolt".

https://www.atfspeed.com/TH400-SPACER-DEEP-PAN-FILTER-BOLT-65-98_p_1622.html

n8roro said:

I got it out with the home made version!

I have a couple more questions:

Is the bolt supposed to be long enough so that the filter is loose?

Any one know the part # of that bolt?

I'm going to try to match it at the hardware store now and see how that goes.

Thanks again for all the help.

Click to expand...

Here are the bolt specs from partstarget.

http://www.parttarget.com/5306-01-1...8&searchoption=sku&originalsearchtext=8633208

Thanks Doghead!