jim Posted January 8, 2010 Share Posted January 8, 2010 What is the correct transmission fluid for the AX15, currently running ATF! Sounds like it needs a GL4 but local transmission shop assures that it runs ATF. 1987 Comanche Pioneer, 4.0L, 4X4, AX15 swap, 88,000 miles rustfree. Sorry no pictures Link to comment Share on other sites More sharing options...
whowey Posted January 8, 2010 Share Posted January 8, 2010 What is the correct transmission fluid for the AX15, currently running ATF! Sounds like it needs a GL4 but local transmission shop assures that it runs ATF. 1987 Comanche Pioneer, 4.0L, 4X4, AX15 swap, 88,000 miles rustfree. Sorry no pictures GL4 gear lube.... Link to comment Share on other sites More sharing options...
jim Posted January 8, 2010 Author Share Posted January 8, 2010 Thanks that is what I am running in my Nissan, I'll give it a try, should quiet everything down even more. Link to comment Share on other sites More sharing options...
james750 Posted January 8, 2010 Share Posted January 8, 2010 Don't put gear lube in, it eats the synchro's. ATF goes in the Tcase, not the trans. The updated lubricant for the AX15 is 10w30 motor oil. It is the same viscosity as 80-90 GL but without the harsh additives that eat the synchros on these transmissions. Link to comment Share on other sites More sharing options...
akamcbird Posted January 8, 2010 Share Posted January 8, 2010 well.... gl3 originaly, don't use gl5 it will eat your brass sincros. jeep says use 10w30 motor oil, it works good. Link to comment Share on other sites More sharing options...
jeepcoma Posted January 8, 2010 Share Posted January 8, 2010 Pennzoil Synchromesh or the expensive Redline MT-90 is safe for your brass synchros. Link to comment Share on other sites More sharing options...
Darren Posted January 8, 2010 Share Posted January 8, 2010 I run 10-30 in my AX-15 Link to comment Share on other sites More sharing options...
jim Posted January 8, 2010 Author Share Posted January 8, 2010 Thanks sounds like as long as I stay away from EP additives the Amsoil GL4, Redline or motor oil should be an improvement over what I have now. Proud to be part of a club that is as helpful and active as this group again thanks for the info. Link to comment Share on other sites More sharing options...
Darren Posted January 8, 2010 Share Posted January 8, 2010 Anytime kid, don't be a stranger! Link to comment Share on other sites More sharing options...
xjrebel Posted January 8, 2010 Share Posted January 8, 2010 well.... gl3 originaly, don't use gl5 it will eat your brass sincros. jeep says use 10w30 motor oil, it works good. syntetic motoroil or mineral motoroil? Link to comment Share on other sites More sharing options...
whowey Posted January 8, 2010 Share Posted January 8, 2010 Don't put gear lube in, it eats the synchro's. ATF goes in the Tcase, not the trans. The updated lubricant for the AX15 is 10w30 motor oil. It is the same viscosity as 80-90 GL but without the harsh additives that eat the synchros on these transmissions. GL5 gear lubes contain sulfur, which is what damages the bronze synchros. But GL-3 gear lube was and is the correct fluid for the AX-15. Since GL-3 is no longer available, GL-4 which still contains no sulfur is now the correct fluid. Chrysler has a history of completely blowing the fluid recommendation for these trannies. They are the ones that started putting the GL-5 gear lubes in that damaged the synchros. Now after the AX-15's have their warranties expire.. only now Chrysler recommends to use motor oil. The same exact situation happened with the AW-4 fluid recommedation. Up until Apr 08 Chrysler recommends Dex III in all AW-4's, going so far as putting a note in TSB's specifically exempting the AW-4. But in Apr 08, when the 2001 7/70 warranties would have been expiring.. they suddenly reverse course and start recommending ATF+4. Doesn't leave me with much confidence in any recommendations for Jeeps..... Link to comment Share on other sites More sharing options...
JeepinSoldier Posted January 8, 2010 Share Posted January 8, 2010 Don't put gear lube in, it eats the synchro's. ATF goes in the Tcase, not the trans. The updated lubricant for the AX15 is 10w30 motor oil. It is the same viscosity as 80-90 GL but without the harsh additives that eat the synchros on these transmissions. GL5 gear lubes contain sulfur, which is what damages the bronze synchros. But GL-3 gear lube was and is the correct fluid for the AX-15. Since GL-3 is no longer available, GL-4 which still contains no sulfur is now the correct fluid. Chrysler has a history of completely blowing the fluid recommendation for these trannies. They are the ones that started putting the GL-5 gear lubes in that damaged the synchros. Now after the AX-15's have their warranties expire.. only now Chrysler recommends to use motor oil. The same exact situation happened with the AW-4 fluid recommedation. Up until Apr 08 Chrysler recommends Dex III in all AW-4's, going so far as putting a note in TSB's specifically exempting the AW-4. But in Apr 08, when the 2001 7/70 warranties would have been expiring.. they suddenly reverse course and start recommending ATF+4. Doesn't leave me with much confidence in any recommendations for Jeeps..... All part of thier evil plan? The trans lasts just long enough to get out of warranty then self destructs in time to make you purchase another vehicle or spend alot of money in thier service departments. :fool: Nothing like a good conspiracy theory LOL. Link to comment Share on other sites More sharing options...
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