LSD noise ?? any advice

[Skimmer]

Right then after a month or so trying to locate an LSD for the van i finally find a chap who has loads of them and builds circuit race cars so this morning i ring him and he says bring my diff over and he'll fit the slipper into it for me setting it up etc so me and my lad whip out the diff , sounds quick , anyway i take it to the chap who does the business fits it etc even telling me that my diff was a new unit etc etc which i knew as i fitted it so thought he seems honest and knows his stuff ........so go home and refit new diff n LSD even putting in the correct oil that the chap supplied me so off for the test drive and after a very gentle 5 or so miles i corner very slightly and theres a very quiet clunk no prob anyway after about 10 miles its all quiet in a straight line though when i pull away from say the lights / roundabout again gently / normal it makes a lot of clunky rattly noises and loud they are too almost as if the shafts are breaking then finally did a gentle left turn into my drive and it made such a loud metalic noise and felt like it was possibly binding ........Re jacked it up back in the garage and the wheels have loads of movement and you can rattle them in a noisey way and there is plenty off oil in there.......Inside my head its telling me that the LSD not right and the noises coming from it aint right i just need to know from someone with experience with these things......Oh its a used Trans X type LSD .......i know this dont seem right but can anyone tell me what could be happening .......Sorry to go on abit but LSD's aint my thing

[turnover]

sounds like youve got too much backlash if its clunking all the time

[Skimmer]

Whats Backlash Terry ??

sounds like youve got too much backlash if its clunking all the time

[w p e]

typical tran x slipper thats been set to tight on the ramp curves. had a lot of this lately with new ones aswell its a fairly simple fix if you no what your doing. take it back to where you got it and get the ramp angle changed in the clutch plates

[oldschoolrules]

if its the salisbury tran-x then you only have two choices on ramp angles and you would be better to have the preload re-set, its likely its a 45/45 set up with fully inter plates meaning the preload across the diff is about 65-75lbft. you can half the preload making the initial bite less aggressive so that the diff behaves more like a normal diff until you push it. the other ramp option for that diff is 30/60 which is not really going to be better for road use, plus it will cost to buy the actual ramp reaction ring part of the diff. as the diff probably has the high preload the noise gets worse as the diff warms up. i had one and it was fine cold but after a run if i came up the hill to our house with a very gentle curve the diff even knocked and banged there.

 

if its the tran-x own version you can get quite a few different ramp set ups with a 45/90 or 55/90 ramp set up being perfect for a road car but again its going to cost you to buy the part.

 

so take it back if you can, get the guy to reset the plates to light weight setting and rebuild the diff, should only take half an hour.

[Skimmer]

Thanks for that , do you fix / set LSD's up then ....

typical tran x slipper thats been set to tight on the ramp curves. had a lot of this lately with new ones aswell its a fairly simple fix if you no what your doing. take it back to where you got it and get the ramp angle changed in the clutch plates

[Skimmer]

Sounds just like mine when first driven all quiet and a slight grin on my face after giving it a few miles and obviously warmed itself up the noise was something else , i lost the slight grin on my face to a very concerned what the f*** , thanks for the info.....

. as the diff probably has the high preload the noise gets worse as the diff warms up. i had one and it was fine cold but after a run if i came up the hill to our house with a very gentle curve the diff even knocked and banged there.

 

.

[w p e]

Thanks for that , do you fix / set LSD's up then ....

typical tran x slipper thats been set to tight on the ramp curves. had a lot of this lately with new ones aswell its a fairly simple fix if you no what your doing. take it back to where you got it and get the ramp angle changed in the clutch plates

 

yes we do on a regular basis and can make them work to how each individual likes them

[Skimmer]

UPDATE ....

Took the diff out again today ready to get it back to the chap i got it off and when i put the diff into a shallow tub ready to transport as i took it into the light i saw a massive amount of metal fileings had appeared in 2 lines as if in line with the sides off the diff ........so it was binding by the look of it ?

Any advice on what has happened ..........Thanks Mark

[w p e]

tell the supplier your findings and see what he comes back with