ZF6 oil
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Mountain Pass
Joined: Dec 2011
Posts: 104
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ZF6 oil
Hi, I have a 01 Superduty with a ZF6, 268,000 miles. I am using regular ole ATF. I want to change the oil soon, and would like know what has been working in there?
I have a grinding when I try to downshift into 1st, or whatever you want to call, the normal take off gear ( not the granny gear opposite of reverse/granny gate ).
I have used Pennzoil synchromesh, in other applications that has worked well, in backlash, not preload transmissions, like the ZF6.
Any ideas? Thanks, Artie
I have a grinding when I try to downshift into 1st, or whatever you want to call, the normal take off gear ( not the granny gear opposite of reverse/granny gate ).
I have used Pennzoil synchromesh, in other applications that has worked well, in backlash, not preload transmissions, like the ZF6.
Any ideas? Thanks, Artie
Senior User
Joined: Aug 2014
Posts: 237
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At the risk of starting another oil debate; I changed mine to Redline Synthetic ATF. It may be my imagination, but it seemed to shift smoother and I eliminated the rollover (klack klack) when you push in the clutch after being under load: Red Line Synthetic Oil - Automatic Transmission Fluids - D4 ATF
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,353
Likes: 5,946
From: Lake Hartwell, GA
I use Amsoil full synthetic ATF, but do have gear roll over when towing heavy at various times. Although, since I bought the truck a year and a half ago and changed the fluid twice, the gear roll over is not as bad as it used to be.
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