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Author  [Modern View]

01-24-2014 16:50:45

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I just replaced springs and rollers in 445 ampli-torque. Manual says to use 90w gear lube. Any better options? Thanks

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curt cooke

01-26-2014 15:18:33

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 Re: ampli-torque in reply to Huille, 01-24-2014 16:50:45  

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01-25-2014 20:16:10

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 Re: ampli-torque in reply to Huille, 01-24-2014 16:50:45  
No one other than me must have gear or bearing trouble as a result of using hytran.... seems to me splash lubed spur gears need a heavy oil. If the torque "slips" in low side its because the heavy oil is sort of gluing the plates together... no harm no foul. Eventually the viscosity of the oil will breakdown for the plates to release and still provide gear lube.

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Joe Pro

01-25-2014 14:36:35

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 Re: ampli-torque in reply to Huille, 01-24-2014 16:50:45  
I second the hy tran, hy gard etc type oil.

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01-25-2014 11:37:13

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 Re: ampli-torque in reply to Huille, 01-24-2014 16:50:45  
When your 445 was built, 90W was probably as thin a gear oil as was available. My U-302 manual recommends 80W which is impossible to find today. I have been using 80W-90 and it works fine. I would think either 80W-90 or 75W-90 would work well in these transmissions and might be better than a Hy-Tran type oil if you are pulling it much and would be better for year-around use than 90W.

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01-25-2014 06:48:15

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 Re: ampli-torque in reply to Huille, 01-24-2014 16:50:45  

I don't know where you are, but I'm in Michigan and that's pretty heavy for the temps here. I went to a Hy Tran oil. Like it a lot better. It's hard to get the 90 weight to warm up so it don't slip.

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