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**DONOTDELETE** 02-22-2002 08:25 PM

GL-3 OR GL-5
I've heard that GL-5 will screw up your AX-5 or AX-15 transmissions, and that you need to put GL-3 in instead. Is this BS? Why would it make a difference? Would a synthetic GL-5 be ok?
Thanks ahead of time for your replies.

Joker2002 02-22-2002 08:52 PM

Re: GL-3 OR GL-5
I've asked this question before myself, and I get about 50% saying that GL-5 is bad, and the other 50% saying it works great. The concern is that a certain additive in the GL-5 oil will damage the brass syncronizer rings. My "official" Chilton's manual, as well as other manual transmission books I've seen, all suggest GL-5 for the AX-15. You could play it safe and just get Redline MTF GL-3. This particular oil has been suggested to me several times before.

93 YJ/4.0L/33x12.50s/D30 front/D35 rear/NP231/AX-15/3" Rough Country suspension/1.25" shackles

jerry 02-22-2002 11:34 PM

Re: GL-3 OR GL-5
I put Mobil synthetic in my AX 5 and after about two years it was full brass particles. It actually looked kinda perddy. There wasn't much left of the synchros at that point.

87 Cherokee 4.0, 90 Wrangler 4.2, 95 Wrangler 2.5

Andytron 02-27-2002 01:53 AM

Re: GL-3 OR GL-5
My 1995 FSM for the XJ and YJ says to use 75W90 or 80W90 (I forget which) GL-5. I do remember hearing something about one year of the AX-15 requireing special lube. Do a search. It was covered a while back.

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