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  #1 (permalink)  
Old 09-19-2021, 01:33 PM
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Default TKO600 What fluid ??

I was re-installing my trans and spilled a bunch of fluid out the tail end. What is the best fluid to use. Figure I will drain the rest and call it an oil change instead of topping off.

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Old 09-19-2021, 01:39 PM
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Quote:
Originally Posted by MaSnaka View Post
I was re-installing my trans and spilled a bunch of fluid out the tail end. What is the best fluid to use. Figure I will drain the rest and call it an oil change instead of topping off.

Thanks,
John
"For all TKO 5-speed models, TREMEC recommends TREMEC HP-MTF, GM Synchromesh™ or Mobil 1 Synthetic ATF. For all other aftermarket models we recommend Dexron III ATF."

https://www.tremec.com/faqs.php
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Old 09-19-2021, 02:53 PM
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If you don't know what's in it just replace it all rather than take a chance on mixing different types.
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Old 09-19-2021, 03:33 PM
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And some of us don't fill it up to the bottom of the fill hole.
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Old 09-19-2021, 04:29 PM
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And some of us don't fill it up to the bottom of the fill hole.
Yep, should be about 1/4" BELOW the fill port. Shifts better that way and Tremec admitted their instructions are wrong.
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Old 09-19-2021, 04:57 PM
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GM Syncromesh or Tremec has their own fluid now. I purchased it from Summit.

John
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Old 09-19-2021, 05:26 PM
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In Tremec's 2018 Performance Product Guide it says that their HP-MTF transmission fluid is only for Tremec transmissions produced from 2008 on. My TKO was built before then so I contacted them to see if the HP-MTF stuff was ok or not for my older TKO. They told me that the year reference was for differentiating the 6-speeds, T56 as opposed to the TR6060 - the TR6060 wasn't released until 2008. So there's a little trivia for you, and yes the stuff is good for older TKOs.
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Old 09-19-2021, 05:56 PM
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Thanks guys!!
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Old 09-20-2021, 07:09 PM
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Cobra valley sells their ultrashift fluid for TKOs. I'm running it, and it's great so far. It's supposed to improve shift feel, but mine wasn't terrible to begin with.
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Old 09-21-2021, 12:01 PM
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Pennzoil makes syncromesh gear oil great stuff cheap and works.
Tom Kirkham likes this.
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Old 11-24-2021, 09:15 PM
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Amsoil Syncromesh is what I'm using and it works great nice and smooth TKO 600.
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Old 11-25-2021, 08:23 AM
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GM Syncromesh seems to work well in my TKO600. It is a 2016 model.
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Old 11-25-2021, 09:10 AM
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For my TKO600 built circa 2005, I ran the GM Synchromesh for a few hundred miles and then replaced it with readily available Penzoil product Tremec recommended in their tech literature. It still does not have a smooth 1st-2nd gear shift so its the box not the fluid. Its fine for the street, but would be clumsy if racing in that 1-2 shift since its a bit notchy.
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