97 f350 5 speed problems

[Tobijas]

Just changed fluid I put in royal purple synthetic now it's grinding from 2-3 anyone have any suggestions? Should I try some thicker stuff or is there an additive I can put it


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[Patrick Feeley]

I found that the RedLine MTL worked better in my 94's original tranny in regards to the grinding issue. The 2-3 grinding (worn synchros due to multiple slave cylinder failures ... long story) was even more apparent after putting in the Single Mass FlyWheel (SMFW). The RedLine MTL helped a lot. I did eventually opt to put in a ZF-Factory remanufactured unit later. Cheers!