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View Full Version : AOD Problems... PROBLEM FIXED



daminc
04-17-2012, 08:47 AM
So I've been having some problems.....
First off... I have a SC AOD with a 2800 converter. Miles are unknown at this point....
also installed new filter, gasket, and drain plug.
I got it from another member here, and he said it was in working condition when he pulled it out of his car for me.

First question
should the dip stick go into the pan? or stop short?
my original 87 AOD has the same length tube but the dip stick is longer and the full marks are about 1-1/2" diff then the stick in the SC AOD.

Second question
Should the TV lever be pushing all the way clockwise until the throttle is moved, moving the TV lever counter clockwise? That's what it's doing ... I believe that's the way it should be set up according to the video I watched

Main problem
The car shifts fine until the rpms go up, then it slips out into neutral when the rpms lower (as I let up on the gas pedal)... then nothing until the rpms go way up again, and it goes back into gear... Does the same thing in all the gears including reverse. It acts like it's low on fluid, but I'm not sure which dip stick is correct... It seems like the stick should go into the pan, but I could be wrong.... When I use the shorter stick, and fill it to the full marks, it leaks out of the bottom of the tube. I'm sure it needs a new O-ring.... But I still have the same problem... plus leaking fluid...

Another question
When the fluid is cold.... Should it read way past the full mark, or lower then the full mark on the stick... The vert reads way lower until it's been running, and this one reads way way past the full marks


If there is a problem with this AOD... I have 2 choices until I get this one rebuilt....

1. Install my original V6 AOD with 108,000, and watch it slowly (or quickly) die behind my 306.....
or
2. Put the C6 in, and get another converter for that... I believe it also has a shift kit in it (if I remember correctly)... and I already have the SB bell, flexplate, and shorter driveshaft for it too. And I also have a ratchet shifter for it..

This will be a temp setup until the SC Aod get rebuilt (if needed), but it won't happen this year. I also don't drive more then 100 miles a year in any of my Cougars.

what do you guys think?

mcb82gt
04-17-2012, 09:35 AM
Im sorry to hear that, I really like your car.

My AOD is acting funny also, since I put the 3.73 gears in.

Im not sure how long the V6 aod will last, but that is prob what I would do. I also admit I know nothing about C6's though. I like the OD, but 100 miles/year is no issue.

Sorry I know I wasnt any help. Im just empathetic cause Im kinda in the same boat. LOL

ThunderbirdSport302
04-17-2012, 09:38 AM
Myself, it depends on the driving I'd do. If it's mostly lower speed (as in, no highway, or interstates, or above 60 or so) I'd probably just rock out with the C4.

If fuel mileage, and highway speeds are definite...well, obviously not the 3 speed auto, for me.

Of course, neither of my Fox cars have an auto, so WTF do I know...

ZondaC12
04-17-2012, 10:56 AM
If you filled it to the point that it leaked out of the tube o-ring, and that didn't help, you definitely have enough fluid. Too much, obviously, but the pump isn't getting starved. I know I've had my pan off with the dipstick not removed and it doesn't just-barely reach the end of the tube, it definitely sits in the middle of the fluid in the pan. If it ever grabs any gear good then the clutches can't all be spent.

I can't visualize the linkage for the TV right now, so damn complicated LOL. But I do know that the lever on the trans itself, is spring loaded. The spring inside the valvebody fights to return the valve to the almost closed position, letting through the least amount of pressure. So when the throttle is opened all the way, that lever should be at the other end of the travel from where it sits with nothing connected to it at all. I don't know if that rotating linkage could make the opposite happen, but I feel like it might be possible, which would be funny but also terrible. Giving you hard shifts with a light pedal and almost no pressure under severe load, which would quickly destroy all of the clutch material. Definitely sounds like a global loss of pressure, whether it's the tailshaft governor, the Throttle Valve, or the pump is shot and not producing enough pressure. Doesn't sound like a shift accumulator is stuck or something like that, which would affect one or two gears.

daminc
04-17-2012, 11:16 AM
yes, the TV lever is loaded, and the cable is pulling the opposite way

daminc
04-17-2012, 11:26 AM
Myself, it depends on the driving I'd do. If it's mostly lower speed (as in, no highway, or interstates, or above 60 or so) I'd probably just rock out with the C4.

If fuel mileage, and highway speeds are definite...well, obviously not the 3 speed auto, for me.

Of course, neither of my Fox cars have an auto, so WTF do I know...

there is no speed limit higher then 45 on the island, and I'm not planning on leaving it

daminc
04-17-2012, 11:30 AM
it also def grabs the gears real good until I ease up on the throttle, then after .. it will grab and chirp the tires when the rpms go up...it will also try to stall the car after it grabs

thewestie
04-17-2012, 11:33 AM
http://www.clickclickracing.com/forums/forum.php

Check here the seem to know alot on aod stuff
Good luck

The Shredder
04-17-2012, 01:41 PM
My AOD acted like that when I didn't have enough fluid. But it seems you should have more than enough.

I believe the fluid level with a full torque converter should be above the pan gasket level but below the fill tube o-ring.

daminc
04-17-2012, 01:48 PM
My AOD acted like that when I didn't have enough fluid. But it seems you should have more than enough.

I believe the fluid level with a full torque converter should be above the pan gasket level but below the fill tube o-ring.

this AOD has about 1/16" from the gasket to the tube. It's pretty much right on the pan.. it's not exactly the same as my 87 where there is maybe an inch of area from where the tube goes in above the gasket line...

Haystack
04-17-2012, 02:14 PM
The only reason I have gotten rid of any of my fox's is the aod going out. A new or rebuilt one costs more then another car. Seems petty now that I can't find one...

I'd rock out a toploader with a top speed of 45mph, you could put some serious gear behind it, get better power, and the same or better gas mileage as an auto wit the same rear gear ratio.

Haystack
04-17-2012, 02:15 PM
Is it possible your trans filter came off? Its also your pick up...

What color is the fluid?

daminc
04-17-2012, 02:43 PM
Is it possible your trans filter came off? Its also your pick up...

What color is the fluid?

I don't think it could have come off. it's got 3 bolts holding it on...
the color is the same exact color that went into it.... the darkish red

V8Demon
04-17-2012, 03:06 PM
Snap a picture of your linkage underneath. That's exactly what mine did when it was binding up on something once.

FWIW -- My dipstick shows higher with the car off.

daminc
04-17-2012, 03:27 PM
Snap a picture of your linkage underneath. That's exactly what mine did when it was binding up on something once.

FWIW -- My dipstick shows higher with the car off.

hey... hold on there... I'm gonna go put it in gear and see it it's hitting something.... not running of course

daminc
04-17-2012, 04:03 PM
Ok, there's absolutely nothing in the way, or rubbing or hitting.... But....... I found a nice pic of the TV linkage, and mine was not connected exactly the same...so I switched some things around, and I'm gonna give it another test run....Hope it was something that simple....

I'll report back shortly.

Daminc out

daminc
04-17-2012, 04:24 PM
so I checked the fluid, gave it a test run, and still the same problem...

went under the hood and revved the motor... what do you know... the TV cable is sticking, and isn't returning to the set position after a big rev....

Ordering a new TV cable setup tonight....

V8Demon
04-17-2012, 04:37 PM
It sounded like something binding. Glad you found it ;)

daminc
04-17-2012, 04:53 PM
I'm glad you said you had the same problem, and found the remedy.... Made me look harder for something binding.
I would have been real upset if I swapped aods, and it still did it. :hick:

daminc
04-17-2012, 06:32 PM
Lokar cable ordered.... now we wait. (and finish putting stuff back on the car)

ZondaC12
04-17-2012, 09:57 PM
Aaayyyyyyyup that's supposed to bring itself back :hick: Sounds good Jerry glad you found the culprit :)

daminc
04-19-2012, 09:37 PM
got the cable, and it's half installed....... ran out of time, and will have it finished tomorrow.

fingers crossed

V8Demon
04-21-2012, 12:26 PM
Well?

daminc
04-21-2012, 02:14 PM
lol.... I worked real late last night.....

I installed the TV cable ...... still not working better, but way better then the old cable......

went to get a new O-ring for the dipstick tube, and said, "what the hell, I'm going to use the original dip stick"

filled it using the fluid I just drained, and added almost 2 more quarts to get it up to the full mark. Now everything is working the way it should be... guess the AOD out of a super coupe takes 2 more quarts then the others.... Who knew

So this concludes the AOD portion of the show.... now I got another problem.... Sounds like a pump somewhere under the hood is running dry after the car is running for about an hr or so.. not sure what it is, but is sounds like bearings grinding real bad.... Oh the fun of rebuilding a car from the bottom up

flylear45
04-23-2012, 06:51 AM
Jumping in late here, but the fluid level in my car is much higher than the mark when cold. It goes down after starting. I believe in my case it is because I have the aux cooler mounted so high that the fluid subsequently drains back when it's parked. It leaked like crazy until I put on a new fill tube seal.

Glad things are working out for you!

daminc
04-23-2012, 07:48 AM
As long as we, are on the subject still.... What coolers are everyone using? Is there any diff between your basic trans cooler and the $200 coolers that they have? Also, should you connect it along with the rad, or on it's own? and should it have it's own cooling fan?

I have your basic cooler, but I disconnected it when I was trying to solve the AOD shifting problems. I thought it may have been clogged, and connected the lines to the rad. I'd still like to use it, but was just wondering if the basic unit was worth it, or should I upgrade

mcb82gt
04-23-2012, 08:04 AM
I plan on using one of these

http://bmracing.com/?wpsc_product_category=transmission-engine-coolers

flylear45
04-23-2012, 12:31 PM
As long as we, are on the subject still.... What coolers are everyone using? Is there any diff between your basic trans cooler and the $200 coolers that they have? Also, should you connect it along with the rad, or on it's own? and should it have it's own cooling fan?

I have your basic cooler, but I disconnected it when I was trying to solve the AOD shifting problems. I thought it may have been clogged, and connected the lines to the rad. I'd still like to use it, but was just wondering if the basic unit was worth it, or should I upgrade


My research led me to a stacked plate unit with thermostatic switched fan in series with the rad cooler. Fluid out from trans, thru rad cooler then through the add-on cooler.

V8Demon
04-23-2012, 09:47 PM
I plan on using one of these

http://bmracing.com/?wpsc_product_category=transmission-engine-coolers

Why use that when you can get from THEIR source?
http://www.importperformancetrans.com/index.php?l=product_list&m=94

Long makes the coolers for B&M. I have one waiting to go in to replace my current one. I'm going with the 4490.

daminc
04-23-2012, 10:16 PM
wow...nice price too

mcb82gt
04-24-2012, 07:57 AM
Why use that when you can get from THEIR source?
http://www.importperformancetrans.com/index.php?l=product_list&m=94

Long makes the coolers for B&M. I have one waiting to go in to replace my current one. I'm going with the 4490.

Awesome. Thank you. :D Saving money = good.