VLSD go clunk clunk clunk

[eerrrrr]

ive had my vlsd on my car for a while now. the first time i drove it around it happened already. whenever i make a left or right turn it would clunk. it also feels like the rear tires skips too. sometimes when i make normal left and right turns the tires would screech as if i were to turn really fast. now it only clunks hardcore whenever theres a lot of weight in the back. the clunking is very hardcore and sounds dangerous. i can feel the clunking on the steering wheel and the shifter (i think). so i just wanna know if there is a problem with it or if its normal for a vlsd to do that.

also the clunking did not occur when i had my open diff so im thinking the clunking is cause by the vlsd.

[curbhuggerrps13]

check the pumpkin to see if the 2 bolts on the back are bolted in all the way. my brother in laws wasnt tightened when he bought his cuz the idiot who owned it before use the bolt as ground for his amp and didnt think tightening was important...otherwise it could be a bad wheel bearing or axle.cheap and easy to fix

[Irukandji]

sounds like you have a clutch type in your vlsd pumpkin. some people are lucky and find clutch types. The clunking is very common in aftermarket lsds because the clutch plates need to slip when making turns. When theres a lot of weight in the back, your rear tires have more traction, so the clutch has to slip so your wheels can spin at different speeds. Be happy, because you got lucky.

Sparknotes: That ain't no VLSD. It's probably a clutch type, so change the diff oil now and then.

[Sonic Motor]

my welded one goes 'clunk clunk" haha

[SoSideways]

my welded one goes 'clunk clunk" haha

Your welded diff shouldn't go clunk. It's probably your tires skipping that's causing a noise.

[eerrrrr]

alright. so i have a chance of it being an aftermarket one? the clunking noise just sounds hella loud and scary. well i guess i will try to take it off and open it cuz thats what a couple of guys in my town told me to do, so i can find out if the diff is an aftermarket one. hopefully it stops raining and i get to do it this weekend. but when ever i do it ill post here or make a new thread saying if it is or not. hopefully its good.

also, to check the diff. all i have to do is take the rear cover off, right? in doing that would i be messing up anything?

[Irukandji]

I'm 99.9% sure you have an aftermarket LSD in your VLSD pumpkin. All you have to do is drop the diff from the subframe after unbolting the axels and driveshaft, as well as the four bolts that hold up the "rear", then open up the cover. You should also make a new gasket from RTV for your diff before you put the rear cover back on to prevent any leaks. Take a picture of what you see inside your pumpkin and we'll be able to identify what it is.

[MidnightRice]

in a vlsd which uses viscous clutches... they require silicone based fluid i found out the hard way myself... i put some regular valvoline gear oil and ran my diff like that... guess what... i burnt the clutches and started to grind the teeth... it locks up but it will never work the same =(... imma fool for that one..

[eerrrrr]

so what kind of fluid should i be using?

[orion::S14]

in a vlsd which uses viscous clutches... they require silicone based fluid i found out the hard way myself... i put some regular valvoline gear oil and ran my diff like that... guess what... i burnt the clutches and started to grind the teeth... it locks up but it will never work the same =(... imma fool for that one..

INCORRECT.

The viscous coupler is a SEALED unit inside the center section of your diff, and is NEVER exposed directly to the gear oil.

You use just regular old 80w-90 GL4/GL5 gear oil...I like Mobil 1.

- Brian

[RedtopTech]

Even a Clutch typre shouldnt be all that dramatic. This usually occurs when someone fails to break the lsd in properly.
Proper procedure:
Drive vehicle in large figure-eight for thirty to fourty minutes. This ensures even break in wear "seating" to the clutch plates
Drain differential and clean throughly with brake clean and refilll. Clutches wear into each other a lot of particles are introduced into the clutch fluid.
Since it is an indeavor to remove the diff for cleaning a lot of people simply drain and refill. this leaves a lot of particles in the diff which will increase wear.
If you just go out there and do a few burnouts the plates will wear unevenly and cause various problems>

[infinitexsound]

my unit does the same ill gradually make a slow turn and all of a sudden the rear kicks in... im guessin its wearing out... but what ever... time for a new clutch type...