Just wondering how an LSD will perform with regular diff oil and no LSD friction modifier. Will it bind? Make noise? Offer no LSD function?
How will an LSD perform without friction modifier?
- Thread starter finderscuba
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Why would one wonder this??.... You shall replace your rear in 3k when the clutch packs fail....
The friction modifier increases the friction between the clutch plates. If you run a gear oil that has no friction modifier in it the diff will act more like an open differential. In short it will decrease the function of the lsd. It won't cause any damage.
listening to Pink Floyd " Be careful w/that ax Eugene "
i put a brandy new auburn in the rear of my 60 last may. the gear oil i used claimed that it had stuff in it for lsds.
well it might have, but not enough of it. the lsd would lock up around corners, and chatter around slight bends.
a quick trip to the parts house for a tube of stuff took care of the issue.
you need extra slippy stuff for them. the additive that used to be used was sperm whale oil.
well it might have, but not enough of it. the lsd would lock up around corners, and chatter around slight bends.
a quick trip to the parts house for a tube of stuff took care of the issue.
you need extra slippy stuff for them. the additive that used to be used was sperm whale oil.
The Detroit TrueTrac doesn't use clutch packs, it uses cut gears - so it'll be fine w/o friction modifiers.
Are you sure? I had a true track in front of my old runner. I could have sworn it used FMs.
X2 .. well actually IMOP factory Toyota LSD are not the best option in the market .. but better than nothing thought ..
Actually, the friction modifiers make it more slippery : leave it out and it will grab more but the clutches with wear very quickly. A lot of the synthetic gear oils are slick enough you don't need to add any additional modifiers
^^ This.
clutch type LSD with non-LSD oil will tend to chatter during tight cornering manoeuvers or right angle stall parking. The clutch packs are metal on metal, they don't really wear that much during normal street use. When they begin to slip excessively, you can disassemble it and shim it up to restore operation.
non-lsd oils will not really harm done to the unit itself, but chatter can be annoying. Add GM or Ford friction modifier to smooth it out.
truetrac or other gear type LSD requires NON-LSD, NON-synthetic oil because they rely on friction between the gear and diff casing to operate.
pretty sure the truetrac is a worm gear type (torsen type2 or quaife atb) torque biasing diff.
The end-thrust on the gear case is what helps it 'lock' and excessively slippery oils will reduce their action.
Toyota/Lexus car diffs (is250, etc) specify non-synthetic, non-LSD oils for proper operation.
IMOP LSD are waste of time and cash .. personal opinion .. I got the factory one in my 80 .. but I would not spend a dime on it.. coz when you really need it it won't work as expected .. means It won't safe your a***