Gear lube to make the thorsen diff less noisy?
03-12-2013, 08:49 PM
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Gear lube to make the thorsen diff less noisy? We have found some spalling on the spider gears in the thorsen diff in the 10 bolt rear. I have 85/140 in there now, is there a gear lube that may be a better choice to quite the noise I here durring making turns and slowing down? I'm not ready to dump a but load of $ in this rear end, and don't have the $ to buy a 9" yet. Hows the lucas stuff, or any other ideas?
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03-13-2013, 09:28 PM
#3
Limited slip diff require a special additive to the fluid to allow the clutches to slip while turning. You need to add that to your diff to cure your noise while turning
03-14-2013, 06:22 PM
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Yes, the Torsen is a worm gear type diff which does not need a friction modifier, although some dealers/TSBs suggested using it anyway to quell noise.
WHAT kind of noise does it make around turns and during power off coastdown, the classic 'rocks in a cardboard box' sound, or something else??
When I still had a stock Torsen T-2 in the car, the Lakewood BFL 80W-90 mineral gear oil (not sure who makes this for them??) was the quietest one I ever tried.
WHAT kind of noise does it make around turns and during power off coastdown, the classic 'rocks in a cardboard box' sound, or something else??
When I still had a stock Torsen T-2 in the car, the Lakewood BFL 80W-90 mineral gear oil (not sure who makes this for them??) was the quietest one I ever tried.
03-14-2013, 09:21 PM
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rocks in a cardboard box sound is a good way to call it!! Thats pretty much how it sounds. So still adding the additive may quite it down? Any brand better then the next?
03-16-2013, 01:02 PM
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Yes, you could try the friction modifier first.
I always use the potent (and the stinkiest fluid on this planet!!
), green colored, Motorcraft XL-3 stuff (especially now with my Eaton carbon fiber clutch pack posi-it's the ONLY one which works!).
If it is still loud, I would then try a premium, 'boutique' type gear oil like; Amsoil's Severe Gear 75W-140, or Red Line 75W-140.
I am currently using the expensive, very hig viscosity index, and hard to get, L.A.T. 75W-140.
I still get some gear whine with this, so next summer change I am going to give the even more exorbibtantly priced (and harder yet to come by) Millers Nanaotech 75W-140 a try.
I always use the potent (and the stinkiest fluid on this planet!!
), green colored, Motorcraft XL-3 stuff (especially now with my Eaton carbon fiber clutch pack posi-it's the ONLY one which works!).If it is still loud, I would then try a premium, 'boutique' type gear oil like; Amsoil's Severe Gear 75W-140, or Red Line 75W-140.
I am currently using the expensive, very hig viscosity index, and hard to get, L.A.T. 75W-140.
I still get some gear whine with this, so next summer change I am going to give the even more exorbibtantly priced (and harder yet to come by) Millers Nanaotech 75W-140 a try.
