s4 or s5 Limited Slip Differential
good way to find out is to stick it in the car, rev up to 5g and dump the clutch. U will find out real quick if it is an lsd. Or you can do about 45 mph, downshift from fourth to 2nd, do a nice clutch kick and some throttle control. If ur drifting with both tires burning, LSD. If not, well, then fail.
Rotary Enthusiast
Joined: May 2001
Posts: 903
Likes: 1
From: Conyngham, PA
Wow this is a really long thread to ID a diff... Honestly, the ONLY way to know for sure what you bought is to pull the stub shafts out, remove carrier the bolts, and pull the two sections apart. If it all looks good, put a new bead of silicone on, tighten the bolts to torque spec, and slid the stub shafts back in. Should take about 20 minutes.
Come to think of it, a good test for a viscous GTUs LSD is to pull the stub shafts and verify that they are indeed different lengths. Open diffs have equal length stub shafts.
Come to think of it, a good test for a viscous GTUs LSD is to pull the stub shafts and verify that they are indeed different lengths. Open diffs have equal length stub shafts.
BTW,
dont let someone dog you about buying something and then finding out later what it is. I did the same thing a few weeks back. I had someone try to **** me into buying and NA LSD diff and swore up and down it was a turbo diff. I took it home and did some research and realised it wasnt what i thought it was.
I took it back to the dude and got my money back.
Just got a turbo diff, half shafts, rare sideskirts, window switches, s5 tails, t2 rims, t2 brakes, 5 lug conversion for $250 last week.
dont let someone dog you about buying something and then finding out later what it is. I did the same thing a few weeks back. I had someone try to **** me into buying and NA LSD diff and swore up and down it was a turbo diff. I took it home and did some research and realised it wasnt what i thought it was.
I took it back to the dude and got my money back.
Just got a turbo diff, half shafts, rare sideskirts, window switches, s5 tails, t2 rims, t2 brakes, 5 lug conversion for $250 last week.
Joined: Dec 1999
Posts: 7,855
Likes: 517
From: Behind a workbench, repairing FC Electronics.
good way to find out is to stick it in the car, rev up to 5g and dump the clutch. U will find out real quick if it is an lsd. Or you can do about 45 mph, downshift from fourth to 2nd, do a nice clutch kick and some throttle control. If ur drifting with both tires burning, LSD. If not, well, then fail.
Dumping clutch tears **** up.
Additionall, if the LSD has worn out clutch packs, then it will act like an open diff, even though he has an LSD...
The proper way to confirm if it is an LSD is to open it... The proper way to test performance is to measure breakaway torque or clearance on the clutch packs.
BTW,
dont let someone dog you about buying something and then finding out later what it is. I did the same thing a few weeks back. I had someone try to **** me into buying and NA LSD diff and swore up and down it was a turbo diff. I took it home and did some research and realised it wasnt what i thought it was.
I took it back to the dude and got my money back.
Just got a turbo diff, half shafts, rare sideskirts, window switches, s5 tails, t2 rims, t2 brakes, 5 lug conversion for $250 last week.
dont let someone dog you about buying something and then finding out later what it is. I did the same thing a few weeks back. I had someone try to **** me into buying and NA LSD diff and swore up and down it was a turbo diff. I took it home and did some research and realised it wasnt what i thought it was.
I took it back to the dude and got my money back.
Just got a turbo diff, half shafts, rare sideskirts, window switches, s5 tails, t2 rims, t2 brakes, 5 lug conversion for $250 last week.
You should know your **** before buying things.
You're very lucky you got an honest seller who'd refund your money.
+1 on Pele's post. I bought an S4 LSD, and don't want to put it in the car until I open it up and measure the clutches. It's not a daily driver, so I have time.
Related question - how do you know when a viscous (S5) diff is worn in the sense that it won't lock up?
Related question - how do you know when a viscous (S5) diff is worn in the sense that it won't lock up?
S5 diffs don't really wear. the fluid inside them breaks down. just replace your fluid and see if that helps. It probably needs to be replaced anyway.
As far as I know viscous type differentials are not rebuildable. If it is severely worn, changing the fluid might not help. The only option might be to by another LSD. The upside is that Viscous LSD's are cheaper than their clutch type counter parts. It all really depends on what you are using the car for.
