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Old 12-09-2010, 12:14 PM   #1
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What Tranny and Fluid to use

I have an 03 Sahara with 4 liter engine and am not sure which 5 speed I have. Was told it could be an AX5 or an NV3550. How do I tell them apart and which fluids do I use?
Want to do some servicing soon and dont want to put in the wrong stuff. Was done at the shop last time but dont really wanna spend that kinda money for something I can do Myself. Also told I can sometimes use something different in the tranny to make it shift easier in cold weather. Any help would be great.

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Old 12-09-2010, 01:08 PM   #2
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the only way to tell what tranny you have is to get under the jeep and look at it.
AX-5/15 uses GL-4 NOT GL-5 (Redline MT-90 is a very good GL-4)
if its NV 3550, ONLY use MOPAR oil.

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Old 12-09-2010, 05:21 PM   #3
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So you know get the build sheet from Chrysler and it tells you everything! I did today after seeing another thread. It included my dana rears and trans type. I got a email back in 4 hours.

First go to Chrysler - Contact Us

then customer assistance then send us a email then fill it out and I put the full vin in the comments section.
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Old 12-09-2010, 06:21 PM   #4
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NV3550 - 2000-2004
* 5 speed manual
* Used with 6 cyl models
* 10 spline input
* 23 spline output
* Ratios:

1st - 4.01
2nd - 2.33
3rd - 1.39
4th - 1.00
5th - 0.78
Rev - 3.57

For anyone else curious of "what is my transmission".....

http://www.wranglerforum.com/f5/tj-t...ecs-26347.html
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Old 12-10-2010, 11:23 AM   #5
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Thanks for the info. Thats sorta what I thought. Someone told me the Canadian versions might be specced different but I dont see why they would. Any ideas of what a good fluid to use would be? Dont feel like getting ripped off at the dealer if its something I probabl carry at the store
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Old 12-10-2010, 12:00 PM   #6
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I would go for the "known" Mopar product. It's synthetic. No need to "borrow trouble" by expertimenting.
How often do you plan on changing the transmission fluid?
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Old 12-10-2010, 12:11 PM   #7
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Probably do it every 30.000 km or so. It was done when I bought it at 70 and its a bit over 100 now so I figure it's due. Gonna do the tcase at the same time.
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Old 12-10-2010, 01:14 PM   #8
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Originally Posted by Wallygator View Post
Probably do it every 30.000 km or so. It was done when I bought it at 70 and its a bit over 100 now so I figure it's due. Gonna do the tcase at the same time.
Check your Owner Manual / Maintenance Schedule for the manual transmission fluid. It keeps saying check it for level. Here's what they say for the 2004:
Quote:
Frequency of Fluid Change
Under normal operating conditions, the fluid installed at the factory will give satisfactory lubrication for the life of the vehicle. Fluid changes are not necessary unless the lubricant has become contaminated with water. If contaminated with water, the fluid should be changed immediately.
For the transfer case it's every 96,000 kms for severe conditions and every 192,000 kms for normal conditions.
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Old 12-10-2010, 01:16 PM   #9
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Redline MT-90 is your best bet.
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Old 12-10-2010, 02:29 PM   #10
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If you have the NV3550, use the Mopar oil. If you use something like Royal Purple Syncromax, it will slowly destroy your syncros.
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Old 12-10-2010, 06:27 PM   #11
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X2 on what ray says, use the factory stuff. Do a search on grinding gears with the
NV3550.
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Old 12-10-2010, 07:21 PM   #12
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If you have the NV3550, use the Mopar oil. If you use something like Royal Purple Syncromax, it will slowly destroy your syncros.
Synchromax actually has a very good reputation in the NV3550, especially since it is not hard on the synchros like a standard GL-5 gear lube is.

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