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Old 12-18-2007, 05:26 PM   #31
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My 3rd gear used to do that in my 99 4.0ltr. Then my clutch went out about 75k so when I put in a new clutch I replaced the syncros 1-4 gears.

problem fixed.

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Old 12-18-2007, 07:16 PM   #32
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But all we know right now is that Chrysler superceded their ax-5/ax-15 fluid with 10W30. I'm going to make a few phone calls tomorrow to some dealers to verify the changes. I wish there was a way to contact Jeep to verify that 10W30 is OK. If everything checks out, then my heep is getting some fresh Synthetic 10W30.
Well I finally bit the bullet and changed the oil in my trans. It was getting too hard to shift. I decided to be the guinea pig and use synthetic 10W30 (which is what Chrysler is recommending now).
once I pulled the fill plug my heart sank when I got a strong sulfer smell, and again after draining slightly glittery oil. I guess the Original owner had replaced the fluid and used GL-5
I got about three quarts out of the tranny, and it took almost all of four to fill it. And after test driving, man it sure felt good to shift!

BTW, I emailed Jeep about the whole fluid change over, and the person that responded recommended consulting the appropriate manual...duh! But apparently the whole ax-5/ax-15 fluid supersesion to 10W30 is old news:
http://www.naxja.org/forum/showthread.php?t=935886

http://www.naxja.org/forum/archive/i...hp/t-2811.html


I did find a website that classfied 10W30 and GL-3 the same..can't find the dang link...But it makes sense since GL-3 has no addatives.

A concern, was the fact GL-4 has half the Sulfer based addatives that GL-5 has. So I wonder if GL-4 is bad for the trans as well.

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Old 12-18-2007, 11:26 PM   #33
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So for all of us having the tough 2nd gear problem use synthetic 10W30 ?
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Old 12-18-2007, 11:30 PM   #34
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It will certainly help!
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99' TJ-SOLD

Without a Jeep for now...
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Old 12-18-2007, 11:37 PM   #35
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So for all of us having the tough 2nd gear problem use synthetic 10W30 ?

Not everybody, there's also posibility of worn synchros. or that foam sleeve on the shifter.
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Old 12-18-2007, 11:39 PM   #36
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yep seing if its the foam thats getting in the way is the easiest and fastest option (about 15 seconds to be exact).. Its also free.
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Old 12-19-2007, 03:22 PM   #37
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I imagine this will work, too?

http://www.amsoil.com/StoreFront/mtg.aspx
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Old 12-19-2007, 10:05 PM   #38
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I also found that pulling away in first then like 2 seconds later changing to second gear is fine too. 2nd has plenty enough torque to get going at 10mph
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Old 02-24-2008, 09:02 PM   #39
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i started having the same problem with my '97 4 cylinder. when i try to put it in second gear during cold weather, it grinds unless i let the RPMs drop to around 1,500. i bought it in September with about 88,000 miles and didn't notice the problem until it got cold. don't know how long it's been doing this isnce i drove it the most while it was still warm out. i noticed some of you guys saying it's like -10 degrees where you live but i'm in GA and 40 degrees is cold here. i get the grinding at any temp below about 55. If i drive around for about 10 mins, it goes away.

i put Redline MT-90 in it today and it didn't make any difference. exact same symptoms. you are supposed to put that in the trany and not the diffs, right? i don't know a whole lot about cars yet but is that the synchro that i'm hearing grind? could it be going bad?
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Old 02-24-2008, 09:08 PM   #40
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sorry about the post above, i didn't notice there was a second page to this thread. i'll try the 10W30 next time i change the fluid. Marc1Kim mentioned the worn synchros above but wouldn't that make the gear grind all the time, not just when the weather's cold? is it really expensive to replace a synchro? probably a ton of work (and therefor a hefty labor charge) to replace a pretty small, simple part, huh?
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Old 02-24-2008, 09:14 PM   #41
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Quote:
Originally Posted by Smeghead View Post
I also found that pulling away in first then like 2 seconds later changing to second gear is fine too. 2nd has plenty enough torque to get going at 10mph
hhhaha yeah now with them 35s first is actually useful
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Old 02-25-2008, 08:34 AM   #42
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Triple88, what's this foam you mentioned above? can you give me more details about where exactly to look and what i'm looking for? would that cause the grinding in just second gear?

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