samantha

Any one have an idea as to what the problem could be on my GTS- When I go around corners (slowly) I can feel the wheels kind of locking up. Almost like studder -- Hard to explain but anyone out there know what I am talking about?


Thanks in advance as always

derporsche928

Hello Samantha,
Oh, what the heck..... I'll chime-in, even though I'm definitely not an expert on this system......
It sounds like your PSD may be engaged permanently-like....
You didn't mention that your PSD indicator light was on, but I assume it isn't....
What you describe makes me wonder if perhaps the little slave cylinder that engages the limited slip might not be stuck-in and the electrics that tell you that it is just don't know it....
Perhaps a bigger brain will jump-in to either refute or confirm my thinking, and have a better explanation of what could be going on....
Best,

Mrmerlin

Try bleeding the PSD is might be time for a service IE fluid flush, it sounds like the diff is locking up all the time

Andre Hedrick

I have heard of people cleaning/rebuilding and then chrome plate the insides to prevent corrosion and such. Has anybody else heard about this idea?

Steve Cattaneo

If the dash reads PSD or ABS OFF, you must have the car checked for fault codes. No traction controls systems Off., the clutch plates in the differential are sticking, exchange the differential fluid with synthetic gear oil. IF you use regular gear oil you must add a LSD friction modifier to the oil.

samantha

Ok, thanks to all that replied as I REALLY appreciate it!! I do vaguely remember an error popping up only a couple times and only when I first started the vehicle (cold start) that indicated something with differential off and/or traction controls off but again it only happened a couple of times at about 1 out of 5 cold starts and it never happened again. There is no specific error up now nor has one showed that actually read PSD or ABS off. How do I drain and change this fluid- is it a very difficult job? Is this on the Nichols site and if so anyone have the right site address?

Thanks again,
Sam

Randy V

A search for 'PSD flush' gets several matches. Here's one that contains a link to the detailed instructions:

https://rennlist.com/forums/showthre...ight=flush+PSD

samantha

Thanks Randy!!!

Steve Cattaneo

Randys, PSD Flush recommendation should be on your future to do preventive maintenance List, but for now just change the differential fluid.



The differential housing has a Allen drain plug on the bottom and a fill plug on the rear cover, on some models you need a 10mm Allen wrench and on others a 18 mm Allen wrench, loosen the fill plug first. It’s a dirty job. Spend the $85 and let a reputable auto repair shop do the job. The PSD Fluid and Differential Fluid are in two separate systems.