Did a search and couldn't find anyone describe this problem. I've had a pair of front 12-way adj HAL QA1 shocks and HAL drag springs and have been happy with them. Recently, the pass side front side has started sagging to the point that I've had to raise the spring perch twice already to raise that side of the car and have it ride level.

I'm not talking a diff of just a 1/4" or so. I've got a difference of over 1 1/2" inches in the spring perch positions. Damn! The driver side perch is about 2 inches down from the top of the threads while the pass side is just 1/2 inch from the top of the threads. Both shocks are set to the same rebound setting and changing the settings makes no difference....

What the hell is sagging, the spring or the shock is shot?

BTW: The car is a 2002 LS1 M6 with 70,000 miles, 30,000 miles on the shoch/spring combo. Never crashed, drives straight.

 

I'd swap the springs from one side to the other, but it's such a PITA, to compress/decompress the spring, disassemble/reassemble the strut, remove and re-install everything just to find out and then, worst of all just go and have to do it all over again to replace either the bad spring or shock.

I'm sure someone has seen this before, was hoping to avoid a load of non-mod work...

 

It is the springs, shocks do not carry load.

 

Thanks Brian. Matter of fact, I just got an e-mail back for HAL stating precisely the same. Apparently, the spring on that one side just decided to take a dump and let go.

Weird thing is that these shocks/springs have been on for just over two years and worked fine. With the only exception of a CF driveshaft installed 4 months ago, no other mods have been done. Nothing has been added/removed that could change the weight distribution.

Freak spring, I guess...

 

I just got another e-mail from HAL in which the Tech has analyzed my particular scenario after requesting the part numbers of what I have installed. He concludes that the springs I have (which are the 275lbs springs) are not designed for a full weight f-body. He recommended the 325lbs for my case, the 275lbs are designed for cars that have undergone "significant" weight reduction, while the 300lbs are for cars with "mild" weight reduction.

I hope anyone reading thinking of ordering springs, reads this before ordering the incorrect spring rate for their ride...

Thunder Racing should probably add something to their site in reference to this possible problem, too.