I just changed the tranny fluid on my t-5 tranny and i used valvoline dex/merc. And it was winning pretty bad so i put some lucas tran fix and it still winnes real bad so does any body have a idea what could help.
If it whines loudly in 1st and gets quieter in 2nd and 3rd and completely silent in 4th then the 15 roller pocket bearings probably ran dry from low fluid at an earlier time and scored the mainshaft.