A833 4 Speed Problems.

340demon said
If you would take what the trany guy said about the uses of auto trans fluid your problem will go away mopar put out a fix for this problem back in the 70'd replace the 90 weight with auto trans fluid it will take care of the problem this was a problem when my demon was new it did work it will get to be more of a problem as it get colder this winter

Sorry I don't agree. He said it "grinds into reverse." That means that the clutch is not releasing and the input shaft is still turning.

Typically heavy (90wt) just causes (some) difficulty getting into gear but NOT grinding in reverse, and may cause "stiff" shifting until warmed up, in cold wx.