Jaxso32 Posted January 14, 2015 Share Posted January 14, 2015 I recently put an ax15 in my mj to replace a shot ba10/5 and up until now it has been perfectly fine. But today and yesterday it has been extremely difficult to shift into 1st or 2nd from a stop. I don't like forcing it into first, any ideas what it is or what will fix it. Other than changing the fluid Link to comment Share on other sites More sharing options...
dscowell Posted January 14, 2015 Share Posted January 14, 2015 You may have to be rolling just a little or give it a little throttle when stopped to put it into first. Mine does the same things sometimes. Link to comment Share on other sites More sharing options...
nitroxsteve Posted January 14, 2015 Share Posted January 14, 2015 What it the temperature when it happens? Link to comment Share on other sites More sharing options...
Jaxso32 Posted January 14, 2015 Author Share Posted January 14, 2015 It's been pretty cold here, negatives or close to it. But today has really been the only time it's acted up Link to comment Share on other sites More sharing options...
AeroNautical Posted January 14, 2015 Share Posted January 14, 2015 The colder it is, the harder it will be, is my experience. First thing in the morning is a pain, but once the fluid warms up it's like butter. Is it always hard to shift in to first and second? Link to comment Share on other sites More sharing options...
87MJTIM Posted January 14, 2015 Share Posted January 14, 2015 Replace gear oil? For winter you may want a thinner oil. Link to comment Share on other sites More sharing options...
Jaxso32 Posted January 14, 2015 Author Share Posted January 14, 2015 When I'm moving, no it's easy to shift, no problem with up or downshifting. Just when I'm compleatly stopped Link to comment Share on other sites More sharing options...
Jaxso32 Posted January 14, 2015 Author Share Posted January 14, 2015 I get that it's going to be difficult when it's colder but It takes some serious force to put it in gear and I don't want to screw up the syncros . And after I put it in I never really did a flush so when it gets somewhat nicer out ill try changing the fluid Link to comment Share on other sites More sharing options...
benjy_26 Posted January 14, 2015 Share Posted January 14, 2015 I'm running 10-30 full synthetic in my AX4 and it's still hard to shift into 1st or reverse when it gets below 25. Just the nature of the beast, I guess. Link to comment Share on other sites More sharing options...
Jaxso32 Posted January 14, 2015 Author Share Posted January 14, 2015 Very well could be what it is, I just don't want to destroy it by forcing it in gear since I just put a lot of working into it swapping the ax15 in Link to comment Share on other sites More sharing options...
benjy_26 Posted January 14, 2015 Share Posted January 14, 2015 I forgot to mention that this is at start up. Once I've been driving for a while, shifting to any gear is smooth. Link to comment Share on other sites More sharing options...
Jaxso32 Posted January 14, 2015 Author Share Posted January 14, 2015 Unfortunatly mine does it even if I've been driving for awhile Link to comment Share on other sites More sharing options...
gogmorgo Posted January 14, 2015 Share Posted January 14, 2015 Something I've found with my Lada (and therefore may not even be relevant here) is that the transmission behaves much better if when I let it idle for a couple minutes to warm up, I leave the transmission in gear and the transfer case in neutral. It seems to get things moving around a bit better. Obviously if you've only got a 2wd (you didn't say) this won't help at all. Edit:: just saw your last comment. This makes it seem like you're running an oil that is a bit too thick. Link to comment Share on other sites More sharing options...
Jaxso32 Posted January 14, 2015 Author Share Posted January 14, 2015 I was kind of thinking that it might be to thick of an oil, but I wanted to see what others with more experience with jeeps and manual trans thought. Not really sure what to put in it now since I don't wanna pay the price of amsoil or redline and I'm kind of hesitant to put 10w 30 in it. Also thanks for the answers and sorry about the limited information I gave Link to comment Share on other sites More sharing options...
Eagle Posted January 14, 2015 Share Posted January 14, 2015 You might try Pennzoil Synchromesh in the yellow bottles. Has anyone actually tried it? I plan to but have not done so, but I have seen favorable reports and I haven't read anything negative about it. Link to comment Share on other sites More sharing options...
benjy_26 Posted January 14, 2015 Share Posted January 14, 2015 Synchromesh works really well in ny MR2. Better than Royal Purple, actually. Next fluid change will be with Redline fluid. I'll keep y'all posted. As far as being hesitant to use 10-30 in an Aisin, don't be. 10-30 has the same protection as 80-90, believe it or not. Link to comment Share on other sites More sharing options...
benjy_26 Posted January 14, 2015 Share Posted January 14, 2015 Link to comment Share on other sites More sharing options...
Jaxso32 Posted January 14, 2015 Author Share Posted January 14, 2015 i was talking to some of the professors at the college i go to and they said pretty much the same thing or to even use atf in the winter so i guess 10w30 is what I'm going to use soon to see if it helps Link to comment Share on other sites More sharing options...
benjy_26 Posted January 14, 2015 Share Posted January 14, 2015 Just go with a decent quality synthetic like Amsoil or Mobil 1 for a lower pour point and you should be fine, I think. Link to comment Share on other sites More sharing options...
87MJTIM Posted January 14, 2015 Share Posted January 14, 2015 You might try Pennzoil Synchromesh in the yellow bottles. Has anyone actually tried it? I plan to but have not done so, but I have seen favorable reports and I haven't read anything negative about it. I've put in my 87 BA10 and an AX15 in my CJ7. Works good. Link to comment Share on other sites More sharing options...
Jaxso32 Posted January 14, 2015 Author Share Posted January 14, 2015 just curious has anyone used valvolines synchromesh oil? Link to comment Share on other sites More sharing options...
Stacks Posted January 15, 2015 Share Posted January 15, 2015 My first thought would be that the clutch has started to drag ever so slightly. If you can force it into gear with continued pressure it could be just the friction of the syhchros finally overcoming the drag so it goes into gear. Does it exhibit the same issue if the rig is stopped, engine off with trans in neutral and trying to put it in 1st or 2nd? Granted you may have to rock it to get the gears to mesh but once you do then you should be able to put it in gear easily. If it still takes the same amount of force to get it in gear then yes the gear oil may be an issue. I've lived in north Idaho or north west Montana all my life and only once have I had an issue with the gear oil being too thick in cold weather. That was cuz of a big error on my part of adding a half a bottle of STP in my full synchro 3 speed. I had to drive a block or two before I could even move the shifter. Just something to think about. Link to comment Share on other sites More sharing options...
HOrnbrod Posted January 15, 2015 Share Posted January 15, 2015 :hijack: Hey Stacks - interested in how your Clifford MJ is going. Checked your build thread and no posts sine last July. She running and driving? Link to comment Share on other sites More sharing options...
Stacks Posted January 15, 2015 Share Posted January 15, 2015 Hey Hornbrod... she's runing and driving good. Still fussing with fine tuning stuff. With the cooler wx here now the mpg is down but then most of my driving lately is just around town so the engine hardly gets warmed up. Most of what I've been doing on her is just little stuff. Got the fog lights mounted on the pushbar and the headlights re-wired onto relays straight of the battery. Bit the bullet and got a wide band A/F meter installed. I need to clean up the mounting of all the extra gauges I have on her. Vacuum, A/F, oil pressure, coolant temp, trans temp, volt meter. The console and dash look pretty redneck right now. I'll have to do before and after pix of dash and console to show what I mean! lol Yeah... I'm a gadgit freak!! lol Chasing a pretty big voltage drop from battery fuse block. Factory volt meter says aaround 10vdc when running and battery is at 14vdc give or take load. Working on a set of 4" stacks for her. Hoping to lower the exhaust note a bit. The split 6 crackle is really pronounced with the 3" stacks. I don't mind but I get some pretty strange looks from people and I don't want to be too obnoxious. Hoping to get a couple 'warm' days so I can work in the driveway on the carb adjustments and timing advance and verify the carb synch. I've gotten to be a wuss about working on that type of stuff when it's below freezing outside. ;) Link to comment Share on other sites More sharing options...
HOrnbrod Posted January 15, 2015 Share Posted January 15, 2015 Thanks Stacks - you have to update your build thread when you get a chance. :yes: Always liked the Clifford stuff since I used to fool around with their products on Chrysler 225 slant six cars back in the day. It's good to see someone doing the same with the AMC I6. :cheers: Link to comment Share on other sites More sharing options...
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