E150 Transmission Problem

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Oct 22, 2005 | 09:24 AM

mikevv

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E150 Transmission Problem

I have a 94 E150 with a 351 engine. It has 150k miles on it and runs great. I had the transmission flushed at 120k miles. About once every 200 miles the transmission seems to drop down a gear, the engine races, there is a hard clunk when it shifts back up and then everything goes on as normal. This always happens at light throttle and low load. It will happen with OD on or off. I have taken it to a dealer and there are no codes and no obvious problems.

Any ideas?

Oct 22, 2005 | 06:05 PM

Ponyracer

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From: Willamette Valley, Oregon

I would suspect the MLP/TR sensor on the drivers side of the trans at the shift lever. It can cause all kinds of trans issues and not set any codes.

Oct 24, 2005 | 03:24 PM

mikevv

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Mlps

Jim
Can you tell me a little more about where it is located? I can see where the shift lever goes into the trans on the driver side and there are a lot of connectors and cables in the area. What exactly am I looking for?

Thanks Mike

Oct 24, 2005 | 05:08 PM

Ponyracer

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From: Willamette Valley, Oregon

I am assuming that you have the E4OD transmission. The pan is a long rectangle with a rear corner cut out like this;

:::::::::::::
::::::***::
::::::***::
::******::
::******::
::******::
::******::
::******::
:::::::::::::

The MLP/TR sensor will be mounted behind the trans shift lever on the drivers side. If the wiring connector plugged into it is a "D" shape then Ford has an update for it and you should update it. Also, when you replace it, put Dielectric grease in the connector to seal out moisture and protect the connection.

Oct 31, 2005 | 07:29 AM

mikevv

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So far so good

I replaced the MLPS and drove the Van 250miles this past weekend with no problems. I will need another 200miles to be positive but I am very optimistic that the problem is fixed. Thanks to all for your advice.

Mike