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Amsoil synchromesh in ZF-5

Discussion in '6.9L IH & 7.3L IDI Diesels' started by Kevin 007, Feb 27, 2020.

  1. Kevin 007

    Kevin 007 Full-floater

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    Stumbled across a few quarts of Amsoil Syncromesh on my shelf that I once bought for an NV4500 GM, that I never ended up using. Im due for a fluid change on a ZF-S542 that has some worn syncros and wondering if anyone has had good results. I have heard rumors that it's good stuff.

    I always use Mobil 1 syn ATF in ZF's....but this will be the last oil change in this trans before it has to come out for some syncro's/cold shifting problems, so im thinking I will give this a try and see what happens.
     
  2. flareside_thun

    flareside_thun Reviving The General Tao

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    I'm interested to know how this turns ou . Mine is a little loose inside as wel .
     
  3. Kevin 007

    Kevin 007 Full-floater

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    I should have in installed in a couple weeks and will report back. If it helps out the synchro problem even a bit, it will be note worthy.
     
  4. Garbage_Mechan

    Garbage_Mechan Garbage Mechanic

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    Redline MTL has kept my ZF’s happy. My 91 had 210,000 miles on the trans and shifts perfectly.
     
  5. Desertfireguy

    Desertfireguy Full Access Member

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    The Pennzoil version didn't make enough of a difference, so I ended up rebuilding with a new synchro/bearing kit. I did refill with new Pennzoil and haven't had any issues since.
     

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