C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

zf6 trans oil question

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Old Jan 25, 2015 | 02:20 PM
  #41  
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Make sure you can loosen the fill plug before you drain the trans.
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Old Jan 25, 2015 | 07:28 PM
  #42  
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Originally Posted by Red 91
Make sure you can loosen the fill plug before you drain the trans.
Thanks, I am going to pick up the 17mm allen socket to remove the plugs tomorrow. Then I will give it a try.....I have sprayed some wd at the plugs in hopes of making them loosen up a bit easier....I will let you know how it went....

Thanks Russell.
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Old Jan 28, 2015 | 06:17 PM
  #43  
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I've i hand ready to fill my 1995 ZF red line MTL, not tested yet , so I'm not be able to say you if improvement in shifting to make , anyway think yes

Last edited by Christi@n; Jan 28, 2015 at 06:20 PM.
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Old Jan 28, 2015 | 09:29 PM
  #44  
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Originally Posted by BigMac2395
Thanks, I am going to pick up the 17mm allen socket to remove the plugs tomorrow. Then I will give it a try.....I have sprayed some wd at the plugs in hopes of making them loosen up a bit easier....I will let you know how it went....

Thanks Russell.
The plugs came out without issue. I drained the fluid. Let it drain for awhile. Cleaned up the plugs and got out my fill hose and snaked it through down past the firewall and refilled with the redline lightweight shockproof gear oil. Talked to Bill from ZFdocs and he said ok to use that fluid. He also said no thread sealant of any kind on the tranny plugs or fill plug. Just torque to 26lbs. It all went just fine.

PS I also replaced my fuel filter while I was down there. 😝
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Old Jan 29, 2015 | 04:19 AM
  #45  
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Originally Posted by BigMac2395
The plugs came out without issue. I drained the fluid. Let it drain for awhile. Cleaned up the plugs and got out my fill hose and snaked it through down past the firewall and refilled with the redline lightweight shockproof gear oil. Talked to Bill from ZFdocs and he said ok to use that fluid. He also said no thread sealant of any kind on the tranny plugs or fill plug. Just torque to 26lbs. It all went just fine.

PS I also replaced my fuel filter while I was down there. 😝
Whrench size for plug?

Allen socket Both 17mm fill and drain?
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Old Jan 29, 2015 | 10:00 AM
  #46  
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Originally Posted by Christi@n
Whrench size for plug?

Allen socket Both 17mm fill and drain?
Yes, 17mm for both.
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Old Mar 14, 2015 | 11:45 AM
  #47  
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Originally Posted by GS977
I bought a brand new zf6 blue tag trans to replace the 90,000 mile one in my 96. it came full of oil from GM. my question is should I run it with the oil that came in it or drain and fill with something better. like amsoil ? here it is.
Just replace trans fluid with red line mtl, going out to take a ride, will come back soon to let you know how its feel
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Old Mar 14, 2015 | 08:34 PM
  #48  
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Originally Posted by Christi@n
Just replace trans fluid with red line mtl, going out to take a ride, will come back soon to let you know how its feel
Red line MTL works very well, after 7 hours, improve are the shifted, like butter, all gear are smoother than old fluid were, that think was a 20 years old fluid.

Reverse gear also is very smooth, before with old fluid was very hard to engage, and sometimes malfunction on back up lights switchhappened, missing to turn on lights, no more

Great smell, typical petroleum, i love it, red colour,
Tomorrow i will re check level, think it will be necessary to add fluid a little, cause today car wasn't on perfect flat surface...

Last edited by Christi@n; Mar 15, 2015 at 08:23 PM.
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