SPF rear end mount problem

Jake · #1 (**permalink**) 03-17-2009, 06:24 AM

Just wanted to throw out there that I had a failure in the passenger side rear end mount on SPF #390. I am unaware if they upgraded the bracket on the newer cars. The metal they used on the mount is thinner then it should be or they should have added gussets to the mount (which I did). Mine sheared loose and actually had bent and tore the mount. This caused the rearend to slip down and the axle to hit on the frame, making a rotational clanging noise come through the roll bar. Just a heads up to do a visual inspection on your SPF's to see if everything looks good. I understand that this is not an isolated issue and it also has occurred on small block cars. Mine is all fixed and as much stronger then it needs to be with the new gussets.

P.S. Ray F. is a certified welder and did a great job fixing the problem. He said that he would fix others for a very reasonable price.

RedBarchetta · #2 (**permalink**) 03-17-2009, 07:49 AM

Please be more specific, as this is new news to me and I've had my car (#747) for five years and don't recall anything specific to a rear-end mount issue. SCOF would have also covered this extensively if it were an ongoing issue (you are a member of SCOF, right?). The upper shock tower brackets can be a weak link and upgrades are available through Performance Unlimited. I highly recommend them.

-Dean #747

wtm442 · #3 (**permalink**) 03-17-2009, 12:31 PM

I get my daily dose of SCOF e-mails. I read the article in SCOF about the upper rear shock mount being rather weak and dangerous before it was redesigned somewhere around car 1640 or so (check the SCOF site for acurate details).

I just got the new brackets. You could use them to tie down an aircraft carrier to a dock. Will be installing them soon.

Your title should not say "rear end mounting" ... its really a new bracket for the top mount of the rear shocks.

Calbullet · #4 (**permalink**) 03-17-2009, 03:14 PM

Warren I think he's talking about this

Cure for the twist

Mel

RedBarchetta · #5 (**permalink**) 03-17-2009, 03:36 PM

Great link, Mel! Good for those with the much earlier cars that may not have been totally sorted out and gone through properly as they were passed from owner to owner.

-Dean

xlr8or · #6 (**permalink**) 03-17-2009, 04:30 PM

Quote:

Originally Posted by Calbullet

Warren I think he's talking about this

Cure for the twist

Mel

Yep that is the problem spot.

1blackbb66 · #7 (**permalink**) 03-17-2009, 09:20 PM

The link does show the problem spot that Jake had and one way to fix it. What I did for Jake is weld in two gussets to the bottom side of each mount. ( We should have taken pictures Jake) A little easier to do and the end result is the same. I guess we will have to look at the shock mounts next. Didn't notice if they were bad or not.

Ray