aod with no od.

Reply Subscribe

Thread Tools

Search this Thread

Oct 19, 2013 | 02:06 PM

Greasemonkey93

Thread Starter

Junior User

Joined: Jul 2012

Posts: 58

Likes: 0

From: Lockport

aod with no od.

aod transmission with 70k lost od last night. it engages but wont hold and seems to neutral out until I move it to D. never used for towing and isn't "horsed around" 1993 F150 5.0 AOD Metric 2wd.

Oct 19, 2013 | 02:53 PM

Ken Blythen

Cargo Master

Joined: Aug 2007

Posts: 2,561

Likes: 70

From: New Zealand

I've had an AOD previously & remember reading that loss of OD, followed later by 3rd, is often how they go when they fail.

Oct 19, 2013 | 03:02 PM

Mike1

Lead Driver

Joined: Mar 2006

Posts: 6,272

Likes: 438

From: IL

I'd check the fluid and see if it's turning brown or smells like it's burning, then if you can work on the trans yourself I'd take it to the dealer. It could be something as simple as your shifter solenoid is going bad. I know when I owned my F350 7.3L with the 4EOD, I started having the same problems, then it started shifting hard. Dealer had to replace coil packs to a tune of $780 installed, Still better than a new trans though.

Oct 19, 2013 | 05:36 PM

timbersteel

Logistics Pro

Joined: Mar 2005

Posts: 4,698

Likes: 47

From: Mexico, Missouri

PCM has no control of the AOD. Possible the servo is bad. I just encountered a loss if reverse in my 1992 F150, and so far, replacing the reverse servo has fixed it.

I'm with Ken on this. That sounds like a possibility. Could also post this in the Clutch, transmission, differential forum for further assistance. I know Mark Kovalsky is the Ford transmission guru. You may be able to send a PM to him.

Oct 20, 2013 | 12:33 AM

Greasemonkey93

Thread Starter

Junior User

Joined: Jul 2012

Posts: 58

Likes: 0

From: Lockport

thanks all. this will be the 2nd used tranny in it. cant seem to get a decent one. would rather replace a servo or o ring instead of a band or clutch. will need further diag but now im off on a decent start.

Oct 22, 2013 | 10:47 PM

Greasemonkey93

Thread Starter

Junior User

Joined: Jul 2012

Posts: 58

Likes: 0

From: Lockport

-UPDATE- T.V. pressure was at 60 psi neutral idle. reset to the 28 psi. still no od
it attempts to engage but still backs off and neutrals out

Oct 23, 2013 | 02:37 AM

Ken Blythen

Cargo Master

Joined: Aug 2007

Posts: 2,561

Likes: 70

From: New Zealand

AFAIK that is still too high.

Here's a link to setting the AOD T.V. - Baumann Electronic Controls

Oct 25, 2013 | 11:12 PM

Greasemonkey93

Thread Starter

Junior User

Joined: Jul 2012

Posts: 58

Likes: 0

From: Lockport

so Ken, you are saying that it still sounds too high? im not attempting to be rude but your link says 30 psi with the tool, which I used. I work with a retired ford mechanic who does everything now. he told me about this site to begin with. either way: still no od, it applies but wont stay in od. this tech told me to check the governor in case its partially plugged.( allowing enough pressure to apply but not hold) its getting cold up here so im looking to find a break at work to check it.

Oct 26, 2013 | 03:17 AM

#10

Ken Blythen

Cargo Master

Joined: Aug 2007

Posts: 2,561

Likes: 70

From: New Zealand

Sorry, I wasn't aware that you had the test tool.......so 28 psi (vs 0-5 psi without it) is in line with their instructions.

An AOD can be upgraded for durability at a price, but by the time mine failed, I had had enough of them & swapped in a C6. I didn't need OD.

If you haven't already seen it, there is a trouble-shooting page on that site - Troubleshooting the AOD Transmission

Oct 27, 2013 | 04:28 AM

#11

Greasemonkey93

Thread Starter

Junior User

Joined: Jul 2012

Posts: 58

Likes: 0

From: Lockport

so from what I understood its most likely my band or a bad seal for 3-4 valve. which is more likely and what do the repairs involve

Oct 27, 2013 | 09:48 AM

#12

nflfreak43

Postmaster

Joined: May 2008

Posts: 2,703

Likes: 3

From: La Vergne, TN

If your diggin that deep you need to just repair it with all the upgrades.. It's only 500 or so in parts if you know how to do it yourself

Oct 29, 2013 | 01:29 AM

#13

Greasemonkey93

Thread Starter

Junior User

Joined: Jul 2012

Posts: 58

Likes: 0

From: Lockport

this I understand. love the comic btw. I plan on putting a 5 speed in it soon. just need the $$$

Jan 15, 2014 | 09:49 AM

#14

96_F250_Deezal

More Turbo

Joined: Jun 2011

Posts: 634

Likes: 21

From: Indiana

yep, its the OD band. its easy enough to fix.

remove the transmission from the vehicle
remove the pan, filter and valve body
remove the OD servo from the bore
remove the front pump from the case
remove the intermediate clutches
remove OD band and discard
replace OD band
Install OD servo in bore to hold band in place - upgrade to "A" servo or aftermarket "A+" servo is desired.
install intermediate clutches
install new front pump gasket and o-ring
install front pump and torque to specs
install valve body and torque to spec
install new filter and torque to spec
install new transmission pan and new gasket, torque to spec
install transmission into vehicle, refill with fluid
adjust TV cable properly
test drive for proper operation