Amsoil synchromesh in ZF-5

Kevin 007 · Feb 27, 2020

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.

flareside_thun · Feb 27, 2020

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

Kevin 007 · Feb 27, 2020

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.

Garbage_Mechan · Feb 28, 2020

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

Desertfireguy · Mar 2, 2020

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.

Kevin 007 · Apr 19, 2020

Finally got the Amsoil synchromesh MTF in my ZF. I immediately noticed an improved shift into 2nd, 3rd and 4th, (the gears that I was having synchro grind issues with before). Its no longer cold enough to know how it will do in the dead of winter but im pretty sure it will be better then the Pennzoil synthetic atf that I have always used in ZF's.
The Amsoil synchromesh will now be my "go to" for ZF5 fluid. I think I will also try it in my ZF6 that will soon be due for a flush

firehonomichl · Apr 19, 2020

That am soil is what I run in mine and I’ll never go back to regular ATF now that I put a new fly wheel and clutch in its even better!

riotwarrior · Apr 19, 2020

Kevin 007 said:
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.

Hey im in Kimberley u close by...lets hook up

Kevin 007 · Apr 19, 2020

riotwarrior said:
Hey im in Kimberley u close by...lets hook up

Haha we used to be close when I was in Osoyoos and you in Keremeos, and we never met, and now were still kind of close and haven't met.
We'll have to make it happen. Im actually near Slocan. Run a towing outfit here, I tow into Cranbrook from time to time. Are you living in Kimberly or just there for a bit? I could run into Nelson or Castlegar if your passing thru

riotwarrior · Apr 19, 2020

Kevin 007 said:
Haha we used to be close when I was in Osoyoos and you in Keremeos, and we never met, and now were still kind of close and haven't met.
We'll have to make it happen. Im actually near Slocan. Run a towing outfit here, I tow into Cranbrook from time to time. Are you living in Kimberly or just there for a bit? I could run into Nelson or Castlegar if your passing thru

Im hete for work building the new Save on foods...so here for bit fer sure...

Kevin 007 · Apr 20, 2020

riotwarrior said:
Im hete for work building the new Save on foods...so here for bit fer sure...

Sounds good. Lets try to connect

riotwarrior · Apr 20, 2020

Kevin 007 said:
Haha we used to be close when I was in Osoyoos and you in Keremeos, and we never met, and now were still kind of close and haven't met.
We'll have to make it happen. Im actually near Slocan. Run a towing outfit here, I tow into Cranbrook from time to time. Are you living in Kimberly or just there for a bit? I could run into Nelson or Castlegar if your passing thru

Im hete for work building the new Save on foods...so here for bit fer sure...

tjsea · May 16, 2020

Any update on how the Amsoil is working for you? Just to clarify, did you use the 5w30 synchromesh fluid or the 75w90 manual transmission fluid they list?

Sent from my SAMSUNG-SM-G890A using Tapatalk

Kevin 007 · May 16, 2020

Hey, ya I used the 5w-30 MTF. I am happy with it and I will choose it as my go to fluid, on ZF's from now on worn out or otherwise. I only have experience with it in one trans so far, and it is better then syn ATF. Cold syncro crunches are still there, but definitely less then before. Likely due to thinner MTF at colder temps.

So I think it should buy me some more time with a tired trans, opposed to dropping it and rebuilding. So that's good news. I will be installing it in a early ZF6 at some point this year, and will report back with results.

tjsea · May 16, 2020

Kevin 007 said:
Hey, ya I used the 5w-30 MTF. I am happy with it and I will choose it as my go to fluid, on ZF's from now on worn out or otherwise. I only have experience with it in one trans so far, and it is better then syn ATF. Cold syncro crunches are still there, but definitely less then before. Likely due to thinner MTF at colder temps.

Do you think it might be a good idea to try the MTG since it's a little thicker? From my reseach it actually carries a ZF spec that works for the S5-42. My tranny has a few synchro issues when trying to shift it a little faster. Sounds like either way I'm going to give the Amsoil a try. It's just trying to figure out which product at this point.

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Amsoil synchromesh in ZF-5

Kevin 007

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