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Old 10-05-2008, 09:39 PM   #1
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AMSOIL Products: Has anyone used them?

Hello, I would like to know if anyone has used AMSOIL Gear Oil for their Manual Transmision. If so, do you like it and which product of theirs did you use. I have a 1999 Wrangler with a Manual Transmision. The Owners Manual says to use a GL-5 Gear Oil and I have a Repair Manual that says to use a GL-3. Which AMSOIL Gear Oil is supposed to be used in our Transmisions?

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Old 10-06-2008, 07:35 AM   #2
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You are supposed to use a GL3, no sulfur content, eats the synchros and any other sintered [bronze, copper] materials. I run Redline MT90 in all of ours. Now we did have a 95 YJ with a 5 speed, that tranny got replaced and my son put Amsoil in it, that was 3 years ago and the friend he sold it to is still running it, he stops by every couple of days.
There was a mistake made in the manuals, started with ~98 and it took them a couple of years of replacing trannies under warranty because the dealers were putting GL5 in them. I think the correction came out in the FSM as an addendum a couple of years later.
I have also heard you can use Penzoil synchromesh but I'll just stick to the redline, to expensive to try something else just to save a buck or two a bottle.

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Old 10-07-2008, 10:36 PM   #3
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Thanks for the info.
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