1994 XR7 Electronic Transmission Prob

1994 XR7 Electronic Transmission Prob

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For 2 years my 1994 XR7 V/8 has been jumping out of OD momentarily and
revving in neutral. I know this problem has been reported but I've seen
no solution. I have done a search on this forum.

The oil has been changed twice with the proper fluid. The only thing
that makes it happen less often is shutting the car off for 10 minutes
and then driving. Makes it hard to diagnose at a shop when this happens.

The vehicle only has 50k on it and sits for long periods of time. The
last guy that looked at it said that the seals were dry and he'd rebuild
the whole transmission, not a great answer.

Does anyone, or has anyone EVER fixed this problem? I'm totally lost!
I've heard range sensor, accumulator and Vacuum Sensor. Nobody seems to
have ever fixed one though.

Can ayone help an old man out

--
John

> GUEST wrote:
> 1994 XR7 Electronic Transmission Prob
>
>
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>
> For 2 years my 1994 XR7 V/8 has been jumping out of OD momentarily
and
> revving in neutral. I know this problem has been reported but I've
seen
> no solution. I have done a search on this forum.
>
> The oil has been changed twice with the proper fluid. The only
thing
> that makes it happen less often is shutting the car off for 10
minutes
> and then driving. Makes it hard to diagnose at a shop when this
happens.
>
> The vehicle only has 50k on it and sits for long periods of time.
The
> last guy that looked at it said that the seals were dry and he'd
rebuild
> the whole transmission, not a great answer.
>
> Does anyone, or has anyone EVER fixed this problem? I'm totally
lost!
> I've heard range sensor, accumulator and Vacuum Sensor. Nobody
seems to
> have ever fixed one though.
>
> Can ayone help an old man out
>
> --
> John

Hello, is that a 302 Cougar? If so then it's got an AOD
in it, AODE if it's electronic. In either case there is an OD servo
like all overdrive transmissions. The Supercoupe Thunderbird had the
largest OD servo installed by Ford, called the "A" servo.
The three parts required for that go up into any AOD by dropping the
pan and R&R'ing the OD servo piston, spring, and cover. In the
AODE it has a different part group, but there is a better servo
available than what you have.

Officially the best answer is to install one of two valve body kits.
TransGo makes both a correction type kit and a heavy duty
"shift" kit. Choose the one for your needs. The OD servo is
a wise upgrade to make if you have issues with OD. The valve body is
still the likely problem.

With any age(years) on the electronic AOD's, it is very wise also top
replace the EPC valve, and other electrical solenoids when a problem
occurs. I suggest spending the $200-$300 for the better parts, and
having the valve body gone through. That parts cost and the labor is
much cheaper than a rebuild, and with that low mileage may give you
many years more life from the car.

FYI, use Mercon V, not the Mercon original fluid, that is old and
obsolete now. Good luck,