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Old 06-20-2019, 05:22 AM
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6 speed manual fluid

I’ve had my ‘10 rubicon for about a month so I’m changing all the fluids just so I know when they were done. The transmission is already a little “clanky” so I wasn’t sure if I should use the factory recommended Mopar fluid or possibly upgrade it to synthetic. I’ve read some people say they have seen improvements after switching to the AMSOIL syncromesh. But I read one guy that had more noises with the royal purple then switched back to the factory Mopar stuff. Anyone had any experience switching to a synthetic? What do you guys think? Factory or synthetic?

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Old 06-20-2019, 05:33 AM   #2
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I noticed an improvement in shifting when using synthetic manual transmission fluid, especially in colder temps.
https://www.amsoil.com/shop/by-produ...-30/?zo=226468
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Old 06-20-2019, 06:01 AM   #3
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Old 06-20-2019, 06:15 AM   #4
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I use Redline MTL (synthetic.) Did notice smoother shifts and less noise when I first switched.
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Old 06-20-2019, 06:39 AM   #5
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I have been a fan of the Redline oils for other applications (race car, especially) and will probably switch to MTL when I change the oil in my tranny soon.
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Old 06-20-2019, 12:23 PM   #6
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I just replaced mine with Pennzoil Synchromesh and it made a noticeable improvement. More likely that it was not at least 105k miles old.
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Old 06-20-2019, 01:04 PM   #7
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If you do the manual transmission oil change, do the transfer case at the same time for good measure. The TC takes ATF fluid.

Both are easy DIY if you want to, the MT a little tricky because of the exhaust crossover being in front of the drain plug, but plenty of threads on this forum and videos on the Interwebs.
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Old 06-21-2019, 02:09 AM
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Quote:
Originally Posted by wheels082 View Post
I noticed an improvement in shifting when using synthetic manual transmission fluid, especially in colder temps.
https://www.amsoil.com/shop/by-produ...-30/?zo=226468
Thanks! I’m going to go woth the AMSOIL.
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Old 06-21-2019, 08:15 AM   #9
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Quote:
Originally Posted by cdeslandes View Post
If you do the manual transmission oil change, do the transfer case at the same time for good measure. The TC takes ATF fluid.

Both are easy DIY if you want to, the MT a little tricky because of the exhaust crossover being in front of the drain plug, but plenty of threads on this forum and videos on the Interwebs.
I agree... With MT you can buy a cut allen slug to put in the drain plug then get a wrench on it. I bought one from Ebay for 10 bux.

My transfer case drain plug did not have a magnet on it for some reason like the rest of my drain plugs.... I wonder why?

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