locking diff. not locking
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Senior User
Joined: Sep 2005
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From: mankato, MN
locking diff. not locking
My new axle has a locking diff in the rear, i was wondering if this takes a special gear oil for the locker because it is not locking right now. Is it just a special gear oil, something special you have to do with lockers, or do i need to go back to the company who sold it.
thanks
thanks
Thread Starter
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Senior User
Joined: Sep 2005
Posts: 237
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From: mankato, MN
I believe it is a tru lock, or lock-right? but not possitive, but it is a full time locker. I'm running 4.56 gears in a dana 70. What kind of friction adder and gear oil would be best. If the exact brand is required i could call the comp tomorrow.
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Joined: Apr 2002
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From: CT
If it's a posi, don't expect much as far as it "locking" and yes, it requires the limited slip suff. Many gear oils come with it already. If its a lock-right locker, like a ratcheting type, and it doesn't lock, addidive isn't going to help..and there is something seriously wrong.
Cargo Master
Joined: Oct 2004
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From: Seneca, SC
yeah the detroit style locker (a true locker, not limited slip) not locking means teeth are broken or the springs aren't pushing the lockers together. Might want to take that cover off and see what you've got/what condition it's in. Only costs you a new gasket and a little more time if nothing's wrong. If you see clutch packs, then you need friction modifier fluid. If you see teeth in the center then it's a detroit. I think that other types exist, but these are the most common.
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Wait a minute
The reply from Amish needs clarification. Friction modifier is designed to allow the clutches in a Traction Lock differential to SLIP. The product does not improve grip or assist the clutches to engage--torque does that, the modifiier allows the clutches slide more easily. This is probably not important to the original poster since he does not have a Traction Lock differential.
Regards
Regards
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Cargo Master
Joined: Oct 2004
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From: Seneca, SC
Pacam I was under the impression that if you had a trac loc that you had no locker without the friction modifier. I thought that this helped the clutches lock, and you never have a true lockup, just increased friction between the axles. I could be wrong here, as you pointed out, but I do know that if the fluid gets old and is not changed, the wheels fail to run together. This may or may not be the case for the poster, as he may or may not have a trac loc axle. I'd check the owner's manual and see what oil it recommends country.
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Friction modifier
Friction modifier is added to the gear oil to allow the clutch discs to rotate without binding. Without modifier, the discs will not slip as easily and the rear end will make some noise. Some guys don't use the stuff since it makes the rear end a little loose. My recent clutch pack needs the stuff but I use only enough to keep it quiet.
Regards,
Regards,
