Transmission Bolt Repair

I once received a $500 tranny rebuild. I have since found out, that is exactly what I got. Two or three bolts now will not torque, obviously stripped out. What is the best way to go about repairing this? Re-thread or drill and re-tap with bigger bolts?

1992 S10 Blazer, 4.3L TBI, 4x4, 190,000 miles.

I once received a $500 tranny rebuild. I have since found out, that is exactly what I got. Two or three bolts now will not torque, obviously stripped out. What is the best way to go about repairing this? Re-thread or drill and re-tap with bigger bolts?

1992 S10 Blazer, 4.3L TBI, 4x4, 190,000 miles.

What bolts?
Oil pan or tail end or other?
MT

The bolts are to the trans oil pan.

The heli coil kit as posted works good.
Most parts places have them in stock.
MT

The heli coil kit as posted works good.
Most parts places have them in stock.
MT

Is it better to use a kit or to re-tap at a slightly larger thread size?

Either way usualy works.
And sometimes I have switched from metric to sae or the other way just screwed in a size larger bolt.
But the next person that drops the pan will have to watch the different size bolt setup.
The kit makes a good professional job.
MT

http://www.amazon.com/Helicoil-5546-8-Thread-Repair-1-25/dp/B0002SREP4

this is the proper way to go. The only way, very profesional.
I use these on all striped out threads.
easy to install and the kit comes with the tap, instalation tool and several coils.
the only thing I had to purches beyound the kit was a drill bit. replacing a 5/16 thread calls for a 21/64 drill bit.
Use brake kleen spray and air to clean out the hold after it is drilled.
On a few occations I used just the fast evaporating brake kleen to clean out the holes as I had no air handy. worked fine.
Then, like mentioned, the next tine your not fumbeling with bolts.

If you can, make up a block to guide the tap drill and tap. Give both the tap and drill just a little clearance. Aluminum is preferred, but hard plastic or phenolic will do. I like to use something 1"-1.5" thick. This keeps the drill and tap straight.

Mark the depth on your drill with a piece of masking tape so the depth is constant. If you can get a tap wrench handle ("T" type) this will make the tapping easier and less prone to breakage.

Bob

:cool: Hi you may want to look at this website (http://www.nes.co.il/Fastener_repair/index.html)they show tools that repair bolts and other threaded fasteners, but they do not create new fastener threads.

What do you think ?