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Unread 03-03-2009, 09:03 AM   #1
MikeyJ
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Changing fluid on a AX5

I want to change the transmission fluid on my AX5, I have a scrape going into 2nd gear sometimes and would like to try to quiet this down/prevent further damage to the syncro. What's the best fluid for my tranny? Where is the drain plug and fill hole?

Thanks in advanced

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Unread 03-03-2009, 10:37 AM   #2
moonshinefuel
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just go to jiffy lube.
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Unread 03-03-2009, 10:39 AM   #3
moonshinefuel
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i know im going to get slammed for the jiffy lube comment. ahh well, i thought it was funny
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Unread 03-03-2009, 10:44 AM   #4
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the general consensus here is either Redline MTL or Penzoil Syncromesh. I have Penzoil in mine with good results. Drain plug should be on the botton and fill on top lol. Sorry can't remember exactly where they are but I know you need torx for at least one of them. Open the fill plug before draining.
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Unread 03-03-2009, 10:46 AM   #5
OneCleanYj
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I ran Syncromesh in my last tranny and it made a big difference when shifting, 4th to 3rd was grinding a lot and it was more or less gone after adding Syncromesh. My current tranny is on it's way out already (POS AX-5!), so I opted for some cheap 70-90w instead of treating it to some good stuff.
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Unread 03-03-2009, 10:46 AM   #6
Beater37887
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The fill plug is on the passenger side if I'm not mistaken....DO NOT remove the plug that requires the Torx bit as it should be labeled DO NOT REMOVE and will screw your tranny (or so I've heard) if you do remove it. I've slept since the last time I checked my fluid but I believe it's a regular plug.
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Unread 03-03-2009, 11:42 AM   #7
jordanw_125
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How much does synchromesh cost?
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Unread 03-03-2009, 01:36 PM   #8
ritjobbie
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Redline MTL is ~$10/quart around here. Synchromesh is about the same. Purple is $15/quart. IIRC, you need just less than 4 quarts to fill an AX5.

I use MTL and love it, especially for cold weather shifting. It made all the difference in the world for my AX5.
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Unread 03-03-2009, 01:39 PM   #9
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Quote:
Originally Posted by jbach View Post
the general consensus here is either Redline MTL or Penzoil Syncromesh. I have Penzoil in mine with good results. Drain plug should be on the botton and fill on top lol. Sorry can't remember exactly where they are but I know you need torx for at least one of them. Open the fill plug before draining.
DO NOT REMOVE THE TORX! The drain is on the bottom and the fill is on the passenger side right next to the torx bolt. I think it was about 1 1/8" socket for the fill and drain plugs, but don't go out and buy a socket based on my memory. On my AX5 the fill plug had a small raised circle in the center of the flat face of the plug.

Always remove the fill plug first. Draining the fluid to find out that you can't put more in leaves you in a crappy place.
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Unread 03-03-2009, 01:43 PM   #10
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FWIW, I tried Penzoil Syncromesh in my AX-15 and it was better initially it was just as bad as gear oil within a short period of time. I also tried ATF as recommended by a tranny shop (buddy of mine) and it was no better.


Finally I used 10W-30 motor oil and it has worked excellent for me for a few thousand miles now!


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Unread 03-03-2009, 03:24 PM   #11
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x2 buddy^^

I use 10w40 on the graph it was a little closer to 75w90



15w50 looks like the closest. But 10w40 is stocked on every gas station shelf in the country. No problems with mine and it's had a rough year.
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Unread 03-03-2009, 04:25 PM   #12
snaustin09
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I have the same problem as the OP, definitely need some new tranny fluid, I think I'll give Redline a try.
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Unread 03-03-2009, 04:49 PM   #13
MikeyJ
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So now it comes down to redline vs syncromesh... I just want to quiet the damn scrape.
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Unread 03-03-2009, 04:52 PM   #14
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You can also use Amsoil's MTF. I sell it for $8.30 per quart plus shipping, PC price.

Keep this in mind. You need a GL-4 fluid as the GL-5 typically uses a sulphur based additive to make it pass the EP certification. As the sulphur gets hot, it becomes acidic. The acid is what causes the damage to the Yellow metals of the syncros. So don't just put any old fluid in to the AX trannies.
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Unread 03-03-2009, 06:23 PM   #15
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Quote:
Originally Posted by MikeyJ View Post
So now it comes down to redline vs syncromesh... I just want to quiet the damn scrape.
No, RL or SM or 10W-30 motor oil. I've got 1000 miles on an AX-15 with 10W-30 and all is perfect. Figure it this way, motor oil is easy to try, cheap, readily available with no shipping charges, and if you don't like it, drain it and put it in your motor.
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