dirtcrew51m

Trans has reg gear oil, is this ok or change to atf?

Just call me Sean

iTrader: (1)

It requires Dextron/Mercon ATF. You will notice an improvement when you put the right stuff in.

dirtcrew51m

Thanks I figured such, the tard who had the truck b4 me put reg gear oil in.

dirtcrew51m

But for now will gear oil hurt the trans? It shifts pretty good now. And please no synthetic suggestions, lol. I used it in my old F150 w\ m5od-r2 and it leaked out of every gasket.

Just call me Sean

iTrader: (1)

It doesn't lubricate the parts as well because it's too thick.

dr_bowtie

thats what I heard too...

my truck had ATF in it when I got it and it didnt shift right and it felt crunchy shifting or gritty as I should say...

I drained it and filled it with the specified fluid and it seemed worse...so i drained it and added 2 quarts of Lucas red fluid and then tranny fluid...that helped alot...then then I drained a quart and added 80-90 to that and now it shifts great...still wont go into 2nd when cold unless I double clutch

Just call me Sean

iTrader: (1)

I'll bet your 1-2 shift fork is worn down to nothing. Soon you'll lose 1st and 2nd all together.

dr_bowtie

1st, 3rd, 4th and 5th shift fine...just 2nd gives me fits...only when cold...as long as the truck runs for 10 minutes to warm the fluid it shifts like butter...someone gave a link for the shift forks..maybe I should go look for them?

EDIT: the 2nd gear issue is only while moving...sitting still it will shift into 2nd like butter...but moving it wont...I am inclined to think syncro more...the previous owner didnt use the clutch to shift...

Just call me Sean

iTrader: (1)

I had problems with 2nd like you describe before my fork quit engaging the shift ring. You can compare it with the 3-4 fork. Mine looks pretty much brand new compared to the 1-2 one.

dirtcrew51m

Thanks, I plan on changing it this week.