Lsd
#1
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I've recently changed my tranny mount, and I was hoping to get rid of a clacking sound when I shift from D to R (and vice-versa), and also a humming sound when I'm at 40mph/70mph (which is really annoying, 'cause it's the speed limit) and luckily the tranny mount just minimized the clacking sound and also the humming but didn't entirely get rid of it. Now, somebody suggested last time I posted that it must be the LSD? What is that, and what does 'LSD' stand for? I wanna learn more about this before jumping into it.
I'm gonna post a few pics later on of changing the tranny mount for the 1995 SC400 since most of the posts here where SC300. It's pretty easy, the only thing that gave me a hardtime was cleaning the metal plate that the mount was bolted to. But I cleaned that mo'fo to its aluminum finish and it looks great now!
I'm gonna post a few pics later on of changing the tranny mount for the 1995 SC400 since most of the posts here where SC300. It's pretty easy, the only thing that gave me a hardtime was cleaning the metal plate that the mount was bolted to. But I cleaned that mo'fo to its aluminum finish and it looks great now!
Last edited by OG Dada; 05-01-11 at 12:42 PM. Reason: pics
#6
Lexus Champion
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ok no stock diffs make noise just going straight even if its an LSD, which no stock SC has and if you installed one you would know what it is then, i would look elsewhere for the problem, if you have a noise at a certain speed its probably either your tranny mounts, engine mounts, or the driveshaft. do a search these are pretty common symptoms for the sc400. how many miles do you have? chances are if you need trans mounts you need engine mounts too.
https://www.clublexus.com/forums/per...vibration.html
https://www.clublexus.com/forums/per...vibration.html
Last edited by Ali SC3; 05-01-11 at 12:30 AM.
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#8
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ok no stock diffs make noise just going straight even if its an LSD, which no stock SC has and if you installed one you would know what it is then, i would look elsewhere for the problem, if you have a noise at a certain speed its probably either your tranny mounts, engine mounts, or the driveshaft. do a search these are pretty common symptoms for the sc400. how many miles do you have? chances are if you need trans mounts you need engine mounts too.
https://www.clublexus.com/forums/per...vibration.html
https://www.clublexus.com/forums/per...vibration.html
#9
Lead Lap
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Carrier bearings are inside of the differential. I would check your diff oil and if its level is ok your problem is most likely in the driveshaft. These cars have a bearing mid way on the driveshaft that can go bad and allow the shaft to move under load which causes a clank sound.
#10
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im gonna throw in a random question since im a few weeks away from purchasing a sc400 shell with hopes that it comes with an lsd rear end. i was under the impression that the sc400's came with a stock lsd (i hope) and the sc300's had the "one tire fire" situation (which is true). so are you saying that ALL stock sc's have this one tire fire? if so where is a good place to purchase an actual LSD since we're on this topic.
#12
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Carrier bearings are inside of the differential. I would check your diff oil and if its level is ok your problem is most likely in the driveshaft. These cars have a bearing mid way on the driveshaft that can go bad and allow the shaft to move under load which causes a clank sound.
#13
Lead Lap
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Did you put any in ? Now, on these cars with the independent rear end not having any oil in the diff won't make the wheel bearings go bad. They are nonserviceabe, sealed units that can only be replaced, and they never come in contact with the diff oil. If your diff oil did get very low you could have worn out the carrier bearings, pinion bearings, ring and pinion gears, or any combination of those. If you really think the problem could be in the diff you should get someone who knows what to look for to check it out, worn pinion bearings or preload bushings can cause clanking but need experience to check out.
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