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Old 10-05-2009, 12:16 PM   #1
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Shifts a little stiff, after tranny fluid change

i changed my tranny fluid a few weeks ago, it seems to shift a little harder into 2nd gear, almost as if the shift pattern has moved over .5" to the right. Before shifting into second was flawless, but now i have to think about it a little bit, instead of just throwing it down into second applying alittle pressure to the left toward me (my normal habbit), i need to come straight down and maybe even over a tad, often wondering if im in 3rd, until i let the clutch out.

It became fussy....

why

and i put in what was recommended almost 4 qrts of i think it was 75 90.

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Old 10-05-2009, 12:28 PM   #2
Really?

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Do you have an AX15 tranny? Sounds like you've used the wrong fluid. Jerry Bransford could tell you for sure, but I think you need to run Redline MT-90 or Redline MTL or Syncromesh in that transmission.

Also, I got this off the Stu's website:

Quote:
Originally Posted by Stu
Manual Transmission - If you have a TJ with either an AX-5 or an AX-15 transmission, do NOT follow the transmission fluid recommendations in the owner's manual. It is a misprint. The factory service manual (FSM) does have the correct information in it. That being said, I use Redline MT-90 or Redline MTL fluid in my AX-15. The GL-3/4 rating of this fluid means it does not have the harmful additives that cause synchronizer wear as experienced when running GL-5 rated fluids. When I switched to MT-90 (shortly after getting the TJ), the cold weather 1st to 2nd gear shift problem that the AX-15 is well noted for became virtually a non-issue. After running MT-90 for several years, I decided to try their MTL fluid. MTL is almost the same except that it is slightly lighter weight. I found that the last little bit of cold weather shifting problem that MT-90 almost cleared up was gone when MTL was used. Redline is a very respected name and I don't think you can go wrong using it. I've never found it in the local AutoZone, Pep Boys, etc. type stores. I pick mine up from a performance shop that caters to the speed crowd. You can find it on-line too. I believe Summit Racing carries Redline Oils. It is highly unlikely you will find Redline at the usual auto parts store (AutoZone, Checker, PepBoys, etc).
Good luck.

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Old 10-05-2009, 12:52 PM   #3
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hmmmm... this is good to know!

the temp has dropped about 10-20 degrees since the change aswell (50's - 40's; with 30's at night)

do you think i should order some of the Redline MTL-90 asap?

i used like a Master Craft 75w 90 (bond auto), i do have an AX-15 im pretty sure, it has hex head fill and drain plugs, fill plug has a pig tail wire attached to it.

Thanks

Thanks For the info. CCain
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Old 10-05-2009, 01:00 PM   #4
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What model year do you have? Most 75W-90 gear lubes sold in auto parts stores are rated GL-5 which is not the best for a transmission, GL-5 means it was made for an axle. Early TJ manuals erroneously specified GL-5 but that was a typo, it really requires either a GL-3 or GL-4 75W-90 (GL-5 is not just a later/better version of GL-3 or GL-4).

As CCain recommended above, Redline's MT-90 is an excellent choice. It's a fully synthetic GL-4 75W-90 gear lube that is well suited for the AX-5 and AX-15. Summit Racing - High Performance Car and Truck Parts l 800-230-3030 is a good source for it or you can get it directly from Redline at Red Line Synthetic Oil but it's a little more costly directly from Redline.

SOME synthetic GL-5 75W-90 gear lubes are fine in the AX-15 and AX-5 though you have to look carefully at the rear label to see if it is. Royal Purple's 75W-90 is a GL-5 but it is ok for use in this application, so is Amsoil's 75W-90 GL-5 gear lube. It and some other synthetic 75W-90 GL-5 gear lubes are ok to use if the back label says something like "safe for use with yellow metals" which means it's safe for your transmission.

Most older non-synthetic GL-5 75W-90 gear lubes aren't safe for use in our AX-5 and AX-15 transmissions because they are harsh on yellow metals which means it's bad for your transmission's gear synchronizers which are made from brass, bronze, etc.
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Old 10-05-2009, 01:05 PM   #5
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98 4.0L 5speed,

Im going to order the Redline MTL-90 (4qrts.) and yes i believe the Master Craft was GL-5

by the sounds of it the MT(L) is just a lighter weight oil correct? in the paragraph above he said there was minor symptoms of hard shifting with the MT-90 and with the MTL-90 everthing seemed to be resolved.
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Old 10-05-2009, 01:28 PM   #6
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Ok i just ordered it,

i went with the MT-90 (75w90) GL-4

it was $49.95 shipped through JEGS, all sites were the same if not a little more.

that master craft was a $39 lesson, i should write Chrystler and ask for a refund!
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Old 10-05-2009, 01:42 PM   #7
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Don't expect dramatic results by changing to MT-90. It's a superb gear lube that is well suited for the AX-5 and AX-15 but it's not a miracle lube. It will work much better and help your shifting in those uber-cold winters you get there in Vermont though.
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Old 10-05-2009, 02:13 PM   #8
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Wooo Hooo, Thank's guys

now i just need to get my heater to blow hotter and we are golden
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Old 10-05-2009, 02:31 PM   #9
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My NV3550 actually shifts worse after I put Pennzoil syncromesh in. It acts like it doesn't want to come out of any of the gears at times. then other times its smooth. except 2nd which now requires dbl. clutching or REALLY slow shifting. I have a feeling a transmission rebuild is in my future.

Hope you have better luck than I have. I may try Redline if you guys think it will help??
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Old 10-05-2009, 03:44 PM   #10
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I'm going to try bleeding the clutch, and see if that gets me anywhere. Its one of those things that needs to be done anyway.

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