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Got a 97 f250 that was a automatic and I just swapped it over to a manual. Donor transmission was a zf42 out of a 93 7.3idi. Everything went great. Truck runs like it rolled off the assembly line as a manual. I get confused when automatic transmission fluid is talked about. The book calls for synthetic mercon. I put castrol mercon v in it. Is this synthetic? I'm also getting alot of gear roll over noise. I did put a single mass flywheel on it.

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If it doesn't say synthetic, it's not. And yes, ZF requires synthetic in this transmission when it's behind a Powerstroke. Synth might reduce the rollover noise, but some fellas just overfill the tranny some by filling from the shifter opening.
 

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all merc V is synthetic no matter who makes it
 

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Yeah mercon.v is synthetic and when I put it in my s5-42 that was in My 95 f350 I got alot of rollover noise with the single mass flywheel.
 

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I use Redline MTF 4 quarts through the shifter top is easiest. Single mass will create more rollover. Congrats on the conversion.

j
 
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