1995 Mustang Auto Transmission

Tiny
BMAX
  • MEMBER
  • 1995 FORD MUSTANG
I have a 1995 Mustang GT with an AOD-E Transmission. The car will down shift and jump back up into the previous gear. I had the transmission rebuilt and it was OK for a few days and then started doing it again.

I took it back to the transmission shop and they pulled the transmission and went through it again, but could find nothing wrong with the transmission, but it continued to do it. Even driving on the interstate with the cruise set at 60mph, it would randomly downshift.

The Transmission shop changed the TPS and MLP sensors thinking that may be the problem. They then changed the valve body in the transmission and it is still doing it, not as bad right now, but I believe it will get worse as it did before.

It shows no codes and never has concerning the transmission. The Transmission guys are convinced the problem is not in the Transmission.

At times it would be so bad the car was almost undrivable.

I like the car and need dependable transportion, but I don't know where to turn.
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Saturday, July 29th, 2006 AT 6:51 PM

2 Replies

Tiny
MIKEYBDMAN
  • MEMBER
I found this, maybe your trans guys can put 2 and 2 together and figure it out.

A shift to neutral at heavy throttle or kickdown can be caused by restricted or flooded shift solenoids. Use the following steps to correct this condition.

Step 1

Check line pressure during the neutral condition.

If line pressure is high (over 200 psi), check the valve body bolts for looseness. If the valve body bolts are loose, torque them to 80-100 inch pounds.

Note This condition usually occurs one or two weeks after rebuild.

Step 2

Check the snout of the pressure control solenoid for wear.

If the solenoid snout is worn, replace the solenoid (figure 2). The Ford part number for the solenoid is F3AZ-70383A. The solenoid bracket should also be replaced (figure 3). The Ford part number for the bracket is F3AZ-7H111A.

Step 3

Check the solenoid pressure regulator valve.

Remove the solenoid regulator valve from the valve body. Make sure the valve strokes freely.

Step 4

Replace the shift solenoids.

Ford has updated the shift solenoids twice. The most current change occurred in 1995. The Ford part number is F5AZ-7G484-A.
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Saturday, July 29th, 2006 AT 7:51 PM
Tiny
BMAX
  • MEMBER
They told me when they pulled the transmission the second time they replaced the solenoids and checked the pressures and everything was good.

They had the car for two weeks trying different things. That may be why they seem to believe the transmission is good and the problem is elsewhere.

I should have given more detail in my previous post, but I wanted to keep it short and readable. I really appreciate and value your response. Thanks!
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Saturday, July 29th, 2006 AT 8:34 PM

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