4R70W help

**DominickSch** · 08-07-2007, 06:48 PM

Well I just changed the filter and fluid Sunday put mercron V in
ran it Monday all was good felt great ran it today to and from work felt great
but when i was comming home from my mother-in-laws i went through 1st
gear into 2nd when the engine hit 3k RPMs i lost trans felt like lack of fluid
truck slowed down and RPMs hot 6k i let off the gas fast slowly revved
up no trans did that 3 times then finally it engaged
any clues?

thanks in advance,
Dom

**DominickSch** · 08-07-2007, 11:06 PM

well as a side note i found that i had to much fluid in so i drained some of it
but did i hurt the trans??

**71hotrodpinto** · 08-08-2007, 01:15 AM

Well the short of it could be that when a trans is over-filled the fluid gets churned up and can foam. Then the trans will loose line pressure and things can and will start to slip. To little. bad. To much. Bad.
Im no trans expert but id change out the fluid and refill with fresh since it sounds like it may have gotten 'foamed up'. I woulndnt know however if the fluid is ruined. Its just what id do.
Good luck.
Other thoughts anyone?

**dbu8554** · 08-08-2007, 01:41 AM

what year trans is this? from when they first came out untill 1998 ford had problems of the tranny losing the 1-2 shift i had this happen in 3 vehicles so far and its a well documented problem if caught before what you experienced you can get some parts to fix the problem but looks like you might be in trouble how many miles are on the tranny now?

**DominickSch** · 08-08-2007, 05:52 AM

Its out of a 95 f-150 and has a little over 137,000 miles on it

**69rangerman** · 08-08-2007, 02:13 PM

The 95 f-150 I just bought from the company I work for (work truck) with 176k on it had to have a rebuild due to the 1-2 shift problem. Since then (well over 50k ago) no problems. Runs great.

Hope yours was just fluid related.

**strtcar** · 08-08-2007, 07:07 PM

Quote:

Originally Posted by DominickSch

Its out of a 95 f-150 and has a little over 137,000 miles on it

I had same problem with 75,000 miles on a 95 t-brid. Finally got rid of the car but I hear this is a problem with the 4r70w

**DominickSch** · 08-08-2007, 07:11 PM

Well like i said i took some of the fluid out and ran it to work today so far so good but then again it ran great Monday the day after i did the change

**dbu8554** · 08-08-2007, 08:10 PM

do a search about the problem with the 12 shift on the 4r70w there is a fix i would suggest doing it before it becomes a problem save yourself a rebuild

**DominickSch** · 08-09-2007, 05:12 PM

Well so far she has been a good girl lol maybe just the high fluid
still a little soft on 1st to 2nd shift o well