No, PST doesn't always resolve problems satisfactorily

The post from Dan K was taken down because he had signed up on all 4 forums and proceeded to spam each one with 4 threads( one in general, one is tech and so on) each with a copy and paste of the same message. All the admin did was remove the duplicates. The original was kept of the FEBO as his car was a Challenger. Here is the link if you would like to follow:

Problem with PST Suspension




This is not an uncommon practice by any small company. Many times even after a new product is done (engineer and test fitting) a company will install them on multiple vehicles prior to putting them up for sales. When we first designed our pivot shafts we worked with and engineering firm on the blue prints, testing and fitting which was years prior to this complaint and since that time sold numerous pairs with no issue. So when the customers complaint came in we called tagged (prepaid shipping label) the pivot shafts and bought them in house for evaluation. At that time I personally checked them against our blue prints and found them ito be correct. So at that point I took them home to fit them to my 72 Duster (which is at my shop with no heat at the time (winter) and it is 20 miles away from my house so with children that are toddlers can be difficult to get away) to see if we could replicate the customers issue which I was unable to do. They installed correctly and torqued down properly without and issue. The hard part here is we could not replicate the customers issue and with not being with him and experiencing his problem makes it difficult to resolve the issue.

Thanks
James From

How were the shafts engineered/designed??? Did you reverse engineer them or get a hold of blueprints for the k-frame and design to those???

If reverse engineered, how do you know if the part that you used to design to was built to nominal and not at one end of tolerance or the other????

What quality control checks do you have in the process??? How often are the parts checked??? How do you check them, attribute or variable gauges???

Do you do SPC??? How capable is your process??? What are your Cp and Cpk numbers??? How do you quarantine out of spec parts???