TC TH400 - thread size?

[dieselponyexpress]

Searching for new bolts for my th400 converter (behind a 6.2l diesel), it seems to me a 10mm-1.5 would fit.
Well, not exactly, so my questions.

This is the same for both of my converters (old & new).

I know the 6.2 motor does have a lot of metric threads but never heard of a GM tc with other than standard size threads, like 3/8-16.

In a parts catalog I found bolts for a H1 (with the old th400) with metrich threads.

I had lots of problems in the past with loose tc bolts and broken flexplates, so I want to go for sure this time.

What do you guys use?

Walter

 

[gambit420s]

ive got 7/16-20tpi in a couple converters i've got laying around; 80 caddy, 80 c-30, 89 V-2500, 72 98, but i think 700's 200's 4l60(e) and 4l80e's are M10x1.5

 

[4X4HIGH]

ive got 7/16-20tpi in a couple converters i've got laying around; 80 caddy, 80 c-30, 89 V-2500, 72 98, but i think 700's 200's 4l60(e) and 4l80e's are M10x1.5

All your info and it doesn't even cover his application.
Actually, i do think it is 10 x 1.5mm though.

 

[gambit420s]

which is exactly why i put it there, i didnt know if the diesel t/c was different as i am not lucky enough to own one. thus the statement about the metric size being correct for other gm tranny's

 

[dieselponyexpress]

Good Info - Thanks a lot gambit & 4x4high

Not too tricky finding a M10x1.5 here in germany

Do you think I should go with a spring washer or take bolts with a larger head section (like a built in washer - don't know the term in your language, sorry for that)?

Thanks again.

Walter

 

[dieselponyexpress]

ttt

 

[POWERMAD]

Do you think I should go with a spring washer or take bolts with a larger head section (like a built in washer - don't know the term in your language, sorry for that)?

That would be a flange head bolt, that is what I would use with a dab of blue loc-tite.