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  #1  
Old 12-29-2010, 10:59 AM
iroc iroc is offline
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Question Here's a good one for u guys

The truck is a 2001 4X4 Edge with 5spd auto tranny.
I will try to explain the best I can. 1st off, the truck won't move when in drive or reverse. If I go to 2nd it will move, or I can go to 1st with the O/D off and it will move. Once i get into 2nd I can put it in drive with O/D off and it will shift fine to 4th. To get it into 5th I have to be going at least 45mph before turn O/D back on. It will kinda coast then go in. Then u can slow down to 2nd gear, speed back up, and it will shift through all of the gears including 5th. WTF. Sounds almost something electrical or speed sensor idk. Oh, and with reverse. It will kinda creep back on flat level ground. Yesterday, I put it into reverse on a hill (going down it backwards) and once the truck got going I would guess around 5mph, reverse started working. I could come to a complete stop and smash the throttle and just rip the tires over! But once I shift out of reverse and back, It will do the same thing until I get moving around that magical speed. Could the speed sensor in the rear diff. cause this. The fluid level is good. No O/D flashing. I do have a ABS light on though, but it's been on for years before this problem. Speedo works fine. Any help would be a great help. Thanks, Lance.
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  #2  
Old 12-29-2010, 01:38 PM
satan satan is offline
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Default Re: Here's a good one for u guys

Sounds like a pressure issue ... not too uncommon for the 5r55e -- there was a TSB about the valvebody gaskets and there's a few manufacturers that have componants for ya.

I'd suggest that dropping the pan is in your future - prolly past time for your filter change anyway - Plan on going that far then add into it dropping the valvebody and swapping the seperator plate gasket...

I'm still kinda wondering why you don't hvae a flashing O/D lamp and a code though...

If the weather here was a bit warmer, I'd offer to sell you the working valve body outta my '01 (some mods on the bench waiting to replace said "stock" unit )


Good reading here:
http://www.explorerforum.com/forums/...d.php?t=140987
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Old 12-29-2010, 02:02 PM
bugz1racing bugz1racing is offline
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Default Re: Here's a good one for u guys

The same thing happend to my '99 3 years ago. After taking it to the tranny shop they said that something in the inside broke causing the problem.
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Old 12-31-2010, 11:16 AM
iroc iroc is offline
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Default Re: Here's a good one for u guys

I guess I'll see if any codes are stored in the computer. If any of the sensors are bad, theyll show up right? Anything else I should check before I drop the tranny and replace it?
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Old 01-03-2011, 07:28 AM
satan satan is offline
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Default Re: Here's a good one for u guys

Sounds exactly like a torn separator gasket, which is addressed by Ford's TSB for your transmission and a few odd parts - Prolly $150 of parts and 3-4 hours under-car - no need for the tranny to come out. -- the Trans-go shift kit should also address this issue (new gasket), though I'd recommend sticking in a new EPC Solenoid while you're on the bench.

I'd suggest pulling the pan and looking for busted band parts or massive amounts of friction material in the pan -- If you don't have broken parts and can assume that the bands are OK, then (since gears are engaging for the most part) look at the sep gasket and EPC solenoid performance for the issues you describe ...

Here's a photo of fairly typical sep gasket failure for the 5r55e (photo source) You can see the blown-out area at the Reverse servo and also near one of the shift solenoids... Pressure lost to these leaks will keep the solenoids from engaging exactly as you describe.


Only a few bolts to get you this far into it -- and give you a good understanding of what you've got.

Even if all you do is pull the pan and look -- you'll have drained out a fair amount of ATF (~5qts) so if you end-up pulling the tranny, it'll be a bit less messy.
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