Forums
New posts
Search forums
Image search
Shop
Amazon Store
T-Shirts
Stickers
Members
Current visitors
Supporting Member Upgrade
Sponsors
About
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Image search
Search
Search titles only
By:
Search titles only
By:
Menu
Install the app
Install
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Jeep Wrangler YJ
YJ General Discussion
AX-15 Transmission Fluid Report
Reply to thread
Message
<blockquote data-quote="Gary747" data-source="post: 427375" data-attributes="member: 19207"><p>Thanks for the 10W30 info... I did NOT know that Chrysler changed that transmission oil recommendation. I do know that I failed (locked up) my first AX-15 using 75W90 and that the heavier oils make the transmission shift harder.</p><p></p><p>I <u>was</u> concerned about AX-15 seal compatibility with ATF, and spoke a shop owner in the area about it. He had knowledge of numerous Jeep owners with manual transmission who switched to ATF and never complained. I literally decided to risk the transmission to conduct my own trial. There are plenty of AX-15's out there, and if I didn't break something, mine could be overhauled and re-sealed.</p><p></p><p>That was over two years ago. No leaks, no losses. Just smooth shifting.</p><p></p><p>Moving on, I recently started a new thread titled "Transfer Case Gearbox Changed" that approaches your NP231 comments, only backwards! Forever, as you mentioned, I used ATF in the transfer case and got 397,000 miles out of it, occasionally adding ATF to top off operational losses. However, my newly purchased (rebuilt) 231J Transfer Gearbox came with the warranty requirement that ONLY 5W30 motor oil be used. You can check that thread for more info, but in this case, the oil swap is backwards... instead of replacing lube oil with ATF, now I'm replacing ATF with lube oil! Again, no leaks. After about 700 miles on the new Transfer Case, I drained and replaced that 5W30 just to flush out any potential manufacturing debris and to check the oil condition. It was perfect.</p><p></p><p>The only devices that I currently use 75W90 in are the axles, but I've no reason to use anything different in them. They were installed at the factory in 1990 and have endured 398,000 problem free miles. I do change those oils regularly and add the limited-slip additive to the front.</p></blockquote><p></p>
[QUOTE="Gary747, post: 427375, member: 19207"] Thanks for the 10W30 info... I did NOT know that Chrysler changed that transmission oil recommendation. I do know that I failed (locked up) my first AX-15 using 75W90 and that the heavier oils make the transmission shift harder. I [U]was[/U] concerned about AX-15 seal compatibility with ATF, and spoke a shop owner in the area about it. He had knowledge of numerous Jeep owners with manual transmission who switched to ATF and never complained. I literally decided to risk the transmission to conduct my own trial. There are plenty of AX-15's out there, and if I didn't break something, mine could be overhauled and re-sealed. That was over two years ago. No leaks, no losses. Just smooth shifting. Moving on, I recently started a new thread titled "Transfer Case Gearbox Changed" that approaches your NP231 comments, only backwards! Forever, as you mentioned, I used ATF in the transfer case and got 397,000 miles out of it, occasionally adding ATF to top off operational losses. However, my newly purchased (rebuilt) 231J Transfer Gearbox came with the warranty requirement that ONLY 5W30 motor oil be used. You can check that thread for more info, but in this case, the oil swap is backwards... instead of replacing lube oil with ATF, now I'm replacing ATF with lube oil! Again, no leaks. After about 700 miles on the new Transfer Case, I drained and replaced that 5W30 just to flush out any potential manufacturing debris and to check the oil condition. It was perfect. The only devices that I currently use 75W90 in are the axles, but I've no reason to use anything different in them. They were installed at the factory in 1990 and have endured 398,000 problem free miles. I do change those oils regularly and add the limited-slip additive to the front. [/QUOTE]
Verification
Post reply
Forums
Jeep Wrangler YJ
YJ General Discussion
AX-15 Transmission Fluid Report
Top
Bottom