Automatic transmission problems

SMILEY9804

MEMBER
2002 FORD EXPLORER
4.0L
V6
4WD
AUTOMATIC
159,583 MILES

Was at a stop sign and lost all forward gears any ideas what that could be? I have the transmission out and the vent hose on top has a hole in it could that be the reason it has no forward gears? It drives in reverse and before this happened there was no signs of any problems.

3 Replies

STEVE W.

MECHANIC
13,443 POSTS

Hole in a vent line won't make a difference, it's a vent that should be open anyway.

Would it still move if you shifted it manually or did you only test it in drive?
It could be a simple solenoid replacement or bad electrical connection. Or it could be mechanical failure internally. If the trans is already out it won't be possible to do any diagnostics as you need the PCM in the vehicle to connect to the electronics while the engine runs and you test the operation using a scan tool.

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Friday, September 1st, 2017 AT 10:58 PM

SMILEY9804

MEMBER
2 POSTS

When it was in it would only move in reverse would not move in any other gear when shifted in forward gears would only shake when pressing gas checked for codes before took it out and it was not giving any codes.

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Saturday, September 2nd, 2017 AT 10:56 AM

STEVE W.

MECHANIC
13,443 POSTS

Codes wouldn't be visible to anything but a high end scan tool. With it in you can activate the various solenoids and run tests.

But as it didn't do anything I would suspect the forward clutch. But it's a gamble.

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Saturday, September 2nd, 2017 AT 6:11 PM