Nick, like I said, we're cool. We just had a definition disconnect.

 

Re: LSD - the Guard LSD is great but does wear like everything else. I had the unit on my 2012 Interseries Cayman rebuilt after 65 track days (race & DE) when I started to notice increasing tail wag when braking hard at end of high speed straights. Glad I rebuilt it, big difference immediately noticeable, under hard braking car tracked straight as an arrow, increasing confidence in those brake zones. Done another 40 days since then and it is holding up well, but I assume I will likely be doing another rebuild sometime this season.

 

Hi Nick. Happy New Year!! You've gotten a lot of good advice above. For my .02 I'll tell you that much has been learned about the 987 platform since your car was built. Many wear items that were previously unknown have been discovered. Tweaks have been made to the suspension and alignment settings. Many of the components in your car have been upgraded in the more current 987 race builds. I would strongly encourage you to talk to Speedsport (they built my car) or Musante if you're looking for someone fairly close to home. Those two shops have built and serviced a ton of cars like yours. I'm confident your car will run better and more reliably if you let a good shop go through it for you. If you'd like more detailed information feel free to PM me and we can take the discussion offline.

BTW, after 45 track days in my Cayman I had my early generation Guard LSD (the same as yours) removed and sent to them for rebuilding. They told me it sill looked like new and they simply modified the ramps to the current specs for our cars. I've put another 40 days on it since then and it's still running perfectly well. Of course, if I was a faster driver that might be a different story...

 

Consider also putting a trans pump in as well as the front cooler. the car is most often at wide open throttle and therefore the fluid in the trans spends much of it time on the rear diff and nt where it belongs in the trans. The pump helps that problem of overheating metallurgy. Have you also considered rebuilding your JRZ's, the fluid needs to be replaced and can probably benefit by re-valving at the same time.

 

I have only glanced some of these responses. The guard diff is all but Bullitt proof. The first round the ramps were set differently. Easy to swap and inspect. The diff cooler is manditory. The temps go to 315 degrees. I have a kit that I use. The control arms and bearings should be timed out. Shocks should be rebuilt and upgraded to our new specs. Change oil very often !!!!! Call me for any questions . Any time.

Spencer ***. SpeedSport

 

4 years is a lifetime,

Fuel pumps, bearings, axles, diff rebuild, damper upgrade/service, ball joints. These are all things we do every winter on our cars.

Call Spencer up!

 

Listen to Spencer, he's know his sh$&.

 

All good advice here, and the Guard LSD is good stuff.

Spencer is referring to the lower control arms (aka 'LCAs') which are definitely a wear item and, if you don't know their age, should be replaced. Failure of this part tends to be sudden and potentially catastrophic. Same part on all four corners, the ends of which contain the 'ball joints' that Olsen mentioned.

The thrust arms and toe control arms should be ok, but check your outer tie rods to confirm that the boots are intact.