Stripped IRS bolt(threads not head)

[A Suede Futon]

So, I put new springs in last week, and when I removed the irs bolts the threads in the middle of the bolts were flattened out. I was able to get the bolt back in and tightened down right, but I would like to hear from you guys if this happened to anybody else. I supported the differential and had it aligned when removing/reinstalling the bolts. Should I just get a new bolt or will I be fine?
Also, when I walked outside this morning I found a few little puddles under the rear diff... This is starting to get aggravating..

 

[RedfireSVT]

i would replace the bolts:

1999-04 Mustang Cobra Low Profile Irs Subframe Bolts at LRS - Free Shipping!

also the rear diff cover in these cars is prone to leaking and it happens to alot of cars. the rear diff cover is very weak and needs to be upgraded or reinforced:

BilletFlow Mustang Cobra IRS Brace (99-04) at LRS - Free Shipping!

1999-04 Mustang Ford Racing 8.8" Irs Rear Differential Girdle, M-4033-G3 at LRS - Free Shipping!

 

[A Suede Futon]

Thanks Tony, Irs brace is on the christmas list :thumbsup: . I was planning to get a low profile bolt as soon as possible. Just wondering if this happened to any others.

 

[ripnesscobra]

In both of the spring installs I have done, the OEM rear IRS subframe bolts were stripped in the the same exact way that you are describing. Both times we replaced them with the low profile bolts. I wouldn't drive the car with the stripped ones.