8-3/4 cap studs

[Paul Secoy]

I found when looking for a source for a set of studs to upgrade from the stock bolts in my 8-3/4 axle, there wasn't a lot of information available. I did decide on ARP part # 250-3012, and they ended up fitting perfectly, all of the coarse threads fit in the carrier housing, and one thread is visible above the nut when torqued. $27.00 at Summit. Hope this helps someone someday

 

[beanhead]

What year housing is it? Just curious because mine ('68) had factory studs with nuts, no bolts. Seems like it would be a heck of a chore hanging that pig back on there without studs!

 

[Paul Secoy]

What year housing is it? Just curious because mine ('68) had factory studs with nuts, no bolts. Seems like it would be a heck of a chore hanging that pig back on there without studs!

These are the 1/2" bolts (4 of them), that fasten the side bearing caps to the carrier. After a certain power level, apparently things wiggle around inside (deflect), and it destroys the ring and pinion. It might only be a small improvement, but it might be what makes the difference.

 

[Jerry Hall]

These are the 1/2" bolts (4 of them), that fasten the side bearing caps to the carrier. After a certain power level, apparently things wiggle around inside (deflect), and it destroys the ring and pinion. It might only be a small improvement, but it might be what makes the difference.

I was thinking the same as @beanhead, thanks for the clarification.

 

[Paul Secoy]

The torque spec for a 1/2" ARP is 110 ft. lbs, as compared to 90 ft. lbs for the stock bolts.

 

[451Mopar]

Thanks for the info. I looked up the length = 3.400"

I used studs in the Dana 60, but don't recall the part# / length, but those may be the same??
When I was changing the gears, I noticed one of the bolts did not match the others. I think it may have been a main bearing bolt?

 

[Paul Secoy]

Thanks for the info. I looked up the length = 3.400"

I used studs in the Dana 60, but don't recall the part# / length, but those may be the same??
When I was changing the gears, I noticed one of the bolts did not match the others. I think it may have been a main bearing bolt?

I think these are longer than those listed for the Dana 60 and I thought I may have ordered the wrong ones, but they ended up fitting perfectly. The factory bolts do look a lot like a main cap bolt for sure.