what should i do

so the truck has been up and running for about three weeks now .yesterday i climb under it and do some checking out makeing sure everything is tight and i find the bolts holding the rear trans mount to the trans gone .so i put new ones in and the threads are stripped out

what do you guys think i should do .

 

Helicoil them and put em back in.

 

bolts were probably over tightened into aluminum tail shaft.............
however, you can helicoil the trans

 

what transmission? did you use the correct bolts? some GM ******s use metric bolts

 

i thought helicoil also .and yes thay probly were over tightend

 

thats a great question turbo 350 dont know if i used the correct ones or not trans was one of those things that was put in an all nite thrash to get it together

 

early TH350s used 7/16" NC bolts to hold the rubber mount onto the aluminum tailshaft . later th350s used (if i recall correctly) a 10 MM standard pitch bolt......a 3/8" bolt will feel like it screwed into the hole , but is that not correct and will not hold

 

thanks 36-3 3/8 bolt is what was in there.Guess i need to get some heli coils
thanks again

 

take a look at the threads , they may be ok..the 3/8" bolt doesn't really grip the metric threads so i don't think you stripped them out . double check the 10 mm size, i may be wrong

edit...the mount holes are not on the tailshaft