Here’s an example of a Dex Merc product.
Ford ZF manuals shifting worse after Amsoil synthetic fluid change. Suggestions?
- Thread starter Mowendevlin
- Start date
I'd use what worked before, that will rule out if the fluid is the problem or not if things improve. If not something might be going on with the transmission in question.
What are you going to reset in a manual trans?
MolaKule
Staff member
Yes I do, intimately.
Oops thought it was an auto box.
Never mind.....
The loose nut behind the wheel?
If you know what was in there before I'd just go back to that. It seems the new stuff isn't letting the synchros do their thing?
My thoughts exactly. Simple enough to rule out too.
This has me interested because I'm working on a truck with a ZF-5 and I had intended to put Amsoil in it. Most guys on the Ford diesel forums prefer synthetic in their ZF transmissions.
I'm not an expert but I would think for the shift quality to be worse either the viscosity is different or maybe the fluid is causing the syncros to not mesh as easily? Does the trans shift any better when warm?
Also brings up the question as to whats the difference between all the fluids. If Mercon was originally speced than whats the difference between it and Mercon V? Also how does Amsoil compare to Mercon and Mercon V? And whats the difference between Amsoil signature series ATF and Torque Drive?
I'm not an expert but I would think for the shift quality to be worse either the viscosity is different or maybe the fluid is causing the syncros to not mesh as easily? Does the trans shift any better when warm?
Also brings up the question as to whats the difference between all the fluids. If Mercon was originally speced than whats the difference between it and Mercon V? Also how does Amsoil compare to Mercon and Mercon V? And whats the difference between Amsoil signature series ATF and Torque Drive?
MolaKule
Staff member
According to the Amsoil PDFs (Technical Specification), which are available on line, the main difference is in the viscosities; the ATL is about 6.3 cST, the ATF is about 7.5 cSt, and the Torque-Drive is about 7.6 cSt.
However, I would surmise that the Torque-Drive contains enhanced chemistry for HD AT transmissions.
However, I still cannot see any rational reasons why the Amsoil product would produce any performance differences, assuming the transmission actually requires an ATF.
