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Pinion Bearing & Clutch Pack

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Old 04-13-2015, 12:00 PM
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Originally Posted by PerryB
At the advise of the shop owner we put standard 90 wt. GL5 in the diff, along with slip lube (friction modifier). My axle also calls for 75/140 synthetic. My bearings were perfect. All I needed was clutches.
Makes me wonder if I should add another bottle of friction modifier. Would it hurt?

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Ken
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Old 04-13-2015, 08:27 PM
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Before doing the clutches I changed the fluid with the syn. 75-140 and intentionally overdosed it about 50% with the FM to see if it would help. No change whatsoever. I drove around in circles, figure 8's and anything else I could think of to get the clutches to scrub in and nothing helped.
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Old 04-14-2015, 11:21 AM
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Originally Posted by PerryB
Before doing the clutches I changed the fluid with the syn. 75-140 and intentionally overdosed it about 50% with the FM to see if it would help. No change whatsoever. I drove around in circles, figure 8's and anything else I could think of to get the clutches to scrub in and nothing helped.
That's what I was afraid of.

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Ken
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Old 04-14-2015, 09:33 PM
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I just had an idea which I would try if I had it to do over. Drain thoroughly and refill with conventional 80/90 GL5 plus FM and see whet happens.
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Old 04-15-2015, 08:49 AM
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Originally Posted by PerryB
I just had an idea which I would try if I had it to do over. Drain thoroughly and refill with conventional 80/90 GL5 plus FM and see whet happens.
I might try that.

Thank you,

Ken
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