1650 problem

[bt 1650]

Morning all,
I've got a rather serious problem. Somehow the 2 bolts attaching the right side frame to the rear end came loose and fell out. I can't seem to get new ones to engage the threads, I'm afraid they are striped out. I'm guessing my only choice is to disassemble everything, drill out and put in heli-coils. Any other suggestions would be greatly appreciated

[olds45512]

Are your new bolts long enough? Those right side bolts are pretty long.

[mortten]

There are 4 - 3/8-16 X 2 1/4" bolts and 2 - 3/8-16 X 2 1/2" bolts.

[bt 1650]

Thanks for the replies, very helpful. I think I was using 2 1/4" don't really remember. Are there clearance issues if I would use longer bolts ?

[bt 1650]

I can't quite tell on partstree, are those through holes into the diff.? If I chase the threads will crap get in my fresh oil ?

[J-Mech]

Originally Posted by bt 1650

Thanks for the replies, very helpful. I think I was using 2 1/4" don't really remember. Are there clearance issues if I would use longer bolts ?

No. But if you aren't getting anything to bite, you don't really have much more thread in there to engage.

Originally Posted by bt 1650

I can't quite tell on partstree, are those through holes into the diff.? If I chase the threads will crap get in my fresh oil ?

Well.... yes. They are open to the oil cavity. You've got troubles.

[ol'George]

Did the bolts break off in the center section ,or did they just come out?
either way, it is going to become an involved job if they don't screw back in and hold.
How mechanically inclined are you?

[bt 1650]

Sorry, had to go to a wake. After a little more investigating, luckily? they didn't break off, although that might have actually been better. I can not run a 2 1/2" bolt all the way in though. I did put a small 3" long pick all the way in and could feel all the threads.
I won't be able to get to it today, but I'll run a tap in and clean up the threads. Then replace the hy-trans and filter, assuming I can get the 2 1/2" bolt to go all the way in.
Thanks for all the help

[ol'George]

I would think it is NOT a good idea to run in a tap, if the hole goes into the rear end.
in other words, a non blind hole, as the cuttings/$hit will go into the differential.
Granted, they might wind up in the filter eventually after circulating in there and causing undue wear.
A tap will not restore threads to original size.
If the threads are pulled out/stripped, things need to come apart and the damage addressed.

[john hall]

Something I have been known to do when trying to get as much of a bolt in a hole as possible, leave off all washers and screw it in by hand or using light wrench pressure. When it stops, notice the gap below the head. Cut off that much from the bolt. Then install the washers on the bolt--they should provide your clearance so nothing bottoms out. There will only be 1/8-1/4" clearance this way so check carefully--make sure the frame is already up tight against the rear, or you will have to allow for that gap also.