AOD tranny problems
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Joined: Sep 2007
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AOD tranny problems
Hi, i have a 1991 ford f-150 4x4 regular cab with an AOD. About 10,000 miles ago i took a 650 mile trip and on the way im pretty sure the overdrive band burnt out. The fluid level was fine, so im not sure what caused it except for the 8+ hours of straight driving. Anyways, i havnt had the money to fix it since, so ive just been riding around in drive (3rd gear) and it shifts fine. There's also a winding noise that comes from the tranny every now and then, especially if i leave o/d on. My question is would it be a better idea to get mine rebuilt, or to go buy a used one? i know where i can get one out of another truck; but i have no idea what sort of condition it was in before the truck was junked...Also, would it help mine any to change the fluid/filter, or is it pretty much a lost cause? Thanks for the help!
David
David
Super Moderator
Joined: Apr 2004
Posts: 34,512
Likes: 2,824
AOD links. Read their stuff, they beef them up plenty. Some kit parts too for rebuilding on the kitchen table.
I've seen what an auto trans looks like taken apart, so no matter what, I would be going to a reputable trans shop. (if there is such a thing, I guess....)
http://www.tciauto.com/Products/Ford/ford_aod.asp
http://ckperformance.com/ford_aod.html
http://www.becontrols.com/products/aodcat.htm
http://www.transmissioncenter.net/AOD.htm
I've seen what an auto trans looks like taken apart, so no matter what, I would be going to a reputable trans shop. (if there is such a thing, I guess....)
http://www.tciauto.com/Products/Ford/ford_aod.asp
http://ckperformance.com/ford_aod.html
http://www.becontrols.com/products/aodcat.htm
http://www.transmissioncenter.net/AOD.htm
Posting Guru
Joined: Nov 2004
Posts: 2,155
Likes: 1
From: sunny fla sometimes windy
I would change the fluid out! It's worth a shot! With the addition of big tires(if you have them bigger than stock), You should consider that a special operating condition so changing out the fluid every 30,000 is needed!! Do the trans fluid check, Take a piece of paper towel and take out your dipstick let it drip onto the paper towel in one spot, Then wipe off the dipstick and put it an a bottle of new trans fluid to the same level that was on the dip stick(so you get roughly the same amount) and on a different spot at least 5" away from the first spot let it drip. You will see the fresh fluid spread out into a big circle, The old if it is really bad will hardly spread at all. After using this method for awhile you will get an idea of the relation of old fluid and how much of a change is needed by the spread of the fluid!
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,661
From: SE Florida
If the transmission is just about to die, changing the fluid might help it die. If you don't change it, the trans will die anyway.
If the trans is not ready to die, but the fluid is worn out new fluid will help it a lot.
If the trans is not ready to die, but the fluid is worn out new fluid will help it a lot.
