Hard shift in cold weather - JeepForum.com
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post #1 of 11 Old 02-24-2020, 12:46 AM Thread Starter
tpetrovick
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Hard shift in cold weather

In the recent cold weather snap my 2000 Jeep TJ 2.5 l, 5 speed started becoming difficult to shift into 2nd gear. All others were fine. After a few miles and a warm up everything shifted fine. Is the problem low gear oil? Or something else. Thoughts? Thanks Tom

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post #2 of 11 Old 02-24-2020, 08:24 PM
Shark_13
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How old is the fluid?

Get out and explore.
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post #3 of 11 Old 02-24-2020, 09:01 PM
TJ4Jim
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Quote:
Originally Posted by tpetrovick View Post
In the recent cold weather snap my 2000 Jeep TJ 2.5 l, 5 speed started becoming difficult to shift into 2nd gear. All others were fine. After a few miles and a warm up everything shifted fine. Is the problem low gear oil? Or something else. Thoughts? Thanks Tom
My 2.5 with the same trans loves Redline MTL.

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post #4 of 11 Old 02-24-2020, 09:53 PM
mukluk
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Cold, thick trans fluid and the synchro that tends to get the most wear... sounds fairly normal since the hard shift cleared up as the transmission warmed. It's unlikely you're low on gear oil, though that is something you can easily check and answer for yourself. You may consider letting the Jeep warm up a bit more before driving off or maybe double clutch second for the first few miles.
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post #5 of 11 Old 02-25-2020, 03:27 AM Thread Starter
tpetrovick
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Thanks for the feed back. I have had the Jeep a little over 2 years. God knows the age of the fluid. Warm weather I guess I should drain it and put in fresh see how that goes. I'll try the double clutch idea until then thanks again.
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post #6 of 11 Old 02-25-2020, 06:42 AM
2jhanna
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in your TJ, you have the AX5. Synthetic 10/30 motor oil can be used or RedLine's MT90.

I am multi-talented, I can talk and piss you off at the same time.

jhanna
denton county, tx
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post #7 of 11 Old 02-25-2020, 05:17 PM
Jerry Bransford
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For your AX-5 go with Redline MT-90 which is a superb full synthetic lube that is ideal for the AX-5 and AX-15 transmissions. Transmissions shift better in extreme cold weather when there's a good full synthetic lube inside.

When you have a choice, buy American made.
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post #8 of 11 Old 02-26-2020, 03:02 AM
Jonny Jeep
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I currently have MT-90 in my AX15 and it's good stuff. When I get around to changing my AX15's rear output seal I have Redline's recommended fluid to try. Not MT-90 or MTL as are regularly recommended on here but their 75W90NS.
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post #9 of 11 Old 02-26-2020, 09:12 PM
Jerry Bransford
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Quote:
Originally Posted by Jonny Jeep View Post
I currently have MT-90 in my AX15 and it's good stuff. When I get around to changing my AX15's rear output seal I have Redline's recommended fluid to try. Not MT-90 or MTL as are regularly recommended on here but their 75W90NS.
You know I'm a big Redline fan but I certainly would not run any synthetic gear lube in the axles. It's well known among gear and axle-heads that the ring & pinion gears run hotter when lubed by a synthetic. That's why companies like Currie and Revolution Gear & Axle recommend strictly conventional gear lubes.

When you have a choice, buy American made.
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post #10 of 11 Old 02-27-2020, 01:52 AM
Jonny Jeep
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I run dino in my axles too, Jerry. The closest the 75W90NS will get to my axles is the inside of my AX15.


Perhaps I wasn't clear enough. Redline's recommended fluid for AX gearboxes is their 75W90NS. Since they recommend it I'm going to give it a try. I can always go back to MT-90 if I don't like the feel of the shifts.
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post #11 of 11 Old 02-29-2020, 06:27 PM
TJSport97
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I've had my '97' since new and it's never been a great shift from first to second. Other gears are fine. I just learned to live with it.

Have a nice day. Gary
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