Just install my B&M holeshot 2400 stall converter on a TH350 tranny. Here is the problem I had. The converter came with 3/8-16 by 1/2" length mounting bolts. When installing them through the flexplate into the converter they only catch about 2 threads and I could feel them staring to strip as I was torquing them to 30 ft. lbs. It really needed a 3/8-16 x 5/8" mounting bolt to fit properly but I could not find any 5/8" length bolts at ACE except in stainless steel. the next size was 3/4" length and they bottom out before being able to tighten them properly. What I did was use a 3/8-16 x 3/4" grade 8 bolt with 2 grade 8 washers. This was they did not bottom out and they do not seem to stick out to far to have clearance issues. I use loctite also. Do you think this will be a problem or should it work OK? Thanks

1/2 bolt sounds kinda small, are you sure you have the flexplate on correct?

The raised part of the indentation on flexplate goes towards the converter, 1/2 should contact more then a thread or 2, maybe you have it on backwards and thats why the supplied bolts are not long enough?

I have it on correct, indentation toward the converter. The threads on the converter do not start until about 1/8" in not leaving much to make contact with.


The raised part of the indentation on flexplate goes towards the converter, 1/2 should contact more then a thread or 2, maybe you have it on backwards and thats why the supplied bolts are not long enough?

I don't see the washers being used as spacers being any problem. But for future reference.....

http://www.boltdepot.com/

Thanks for the link. Hopefully it is OK since I did use loctite also.


I don't see the washers being used as spacers being any problem. But for future reference.....

http://www.boltdepot.com/

Would it have been better to use the bolt, washer and a lock washer instead of just using the bolt and 2 flat washers?

Would it have been better to use the bolt, washer and a lock washer instead of just using the bolt and 2 flat washers? If you used a torque wrench on the bolts, and applied the proper torque, it shouldn't be a problem. You went the extra mile and used the loctite also, so I wouldn't worry about it if I were you. As long as all or most of the threads of the holes in the torque converter are engaged by the bolts, you should be good.