T150 / Dana 20 Lube - JeepForum.com
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post #1 of 4 Old 02-16-2009, 05:49 PM Thread Starter
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1977 CJ5 
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T150 / Dana 20 Lube

I know that the recommended lubricant for my trans & T case is 80W GL-4. Is it OK to use 80W90 that's GL-3, 4 & 5 or do I need to use one that's only GL-4?

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post #2 of 4 Old 02-16-2009, 05:53 PM
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Get the stuff from NAPA that's rated safe for brass synchros.

90 YJ, 4.2, AX-15
86 K1500, 305, 700R4

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post #3 of 4 Old 02-16-2009, 06:46 PM
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I have been using the Coastal 80-95 or whatever it is with all the GL's forever. You should be fine.
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post #4 of 4 Old 02-16-2009, 07:19 PM Thread Starter
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Thanks I have plenty of that same brand and weight that I use in my tractor and didn't want to buy more if it wasn't necessary. I didn't think it would hurt or make shifting harder but since I've got it tore down, I didn't want to have to do it again in a long while.
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