View Full Version : gear lube
January 6th, 2008, 07:31 AM
i have a 9" with a detroit trac-lock. if iuse royal purple will i still need the limited slip additive? the 3-rd member is new and i need to change the fluid for break-in.
January 6th, 2008, 02:08 PM
I think Royal Purple has the hypoid lube in it, read the side of the bottle. Remember it is something you can have too much of.
January 6th, 2008, 04:02 PM
you can have too much? should i use the purple or regular fluid and just add the additive?
January 6th, 2008, 06:17 PM
Too much posi lube will cause the clutchs to do something bad. Look at the bottle, it should say. Regular and the additive is a garentee but I'd check.
January 6th, 2008, 06:20 PM
thanks. i guess that trac-lock and limited-slip are the same?
January 6th, 2008, 06:58 PM
Is it clutched or gear drive? If its a clutch or cone style, you need the lube. Gear drives.... don't know.
January 6th, 2008, 07:23 PM
A Trac Lock is a clutch-style limited-slip and does need friction modifier (I don't think "hypoid" is the answer here...that's for the r&p...all automotive gear lube is hypoid gear lube...correct me if I'm wrong).
A Detroit Truetrac is a gear style and should not require friction modifier.
Detroit is not the manufacturer of the Trac Lock...so which do you really have?
January 6th, 2008, 07:26 PM
I just recall that line from my '64 service manual, not sure if hypoid is right either. However yeah, you need the modifier for clutch or cone limited slips.
January 6th, 2008, 07:27 PM
January 7th, 2008, 11:23 AM
the original was a traclock, this one is made by detroit and is a locking type. it was made for me and installed while i was out of town. if it dosnt need the modifyer will it hurt to have it any ways thanks
January 7th, 2008, 11:34 AM
hey i just found the papor work. sorry iam polish. it is a detriot locker and dose not need any modifyer.
(actually my whife found it) thanks for your help guys. 8) the track-lock was the factory style
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