theville89

alright this might sound stupid but is the limited slip in these trucks really a limited slip. and by my understanding LS is similar to a locker correct...one wheel spins then the other kicks in. the reason i ask is b/c i have the 9.75 rear end with 3.55 gears and LS and about a month ago i had my diff serviced and i told the guy (ken towerys) that it was a LS but they didnt add any of the friction stuff or whatever its called. do these trucks not require any of that stuff. i was just wondering cause there is a vibration i can here and feel sometimes coming from the rear somewhere when turning and was wondering if this could cause that.

Schertz7

sounds like the clutches are chattering. the should be a tag on the diff cover that tells you to use additive, at least mine does.

theville89

yeah i know about the tag but its hard as hell to read. they actually had the friction stuff sitting there ready to go in then i noticed the guy didnt put it in so i asked why and he said it didnt call for it but i reminded him it was LS but he said the computer said no. when the clutch chatters is it all the time thing or every now and then

whitecrystal1

If your axle is ls you need to have one bottle of the ls modifier added.

theville89

im 100% sure...the axle code for my truck is H9 and last time i checked that means 3.55 gears LS. if ken towerys f***ed up b/c they didnt add that stuff and the result is something vibrating in the rear i am going to own their ***.

whitecrystal1

Yep that's the same rear I had in my 02. You need friction modifier in it.

theville89

could that be the reason for my rear vibrating only when i go from a dead stop to making a turn....no matter how fast i do it.

whitecrystal1

Yes. The modifier allows the rear to slip so this doesn't happen.

theville89

i no where im going in the morning. good thing i still have the reciept. stupid *** mother ****ers i told the guy it was a LS and now look. depending on how bad this is can it be fixed by adding some stuff or while i need new gears or what ever.

whitecrystal1

You'll probably be fine after the stuff gets added.