Hi All,
I'm a new member and am glad to have found like minded folks to swap lies with.

I have a 1991 F250 4x4 with 7.5 V8 (460 ci.) and E4OD. Climbing a slow winding road yesterday and pulled in into 2nd from D to keep it from shifting up and down and had no power with what seemed like tranny slipping. Only works in D and Park. 1st, 2nd and Rerverse all no power and slipping. Code reader also indicated Manual Lever Position Sensor (code 67) problem. Thought I would change the sensor but at $108.+ at the Ford dealer I thought I would ask what else it might be first. Or maybe I'm on the wrong track all together. Trranny works fine in D.

Tnx,

Stay/W/ It

 

I have a similar problem. My 2nd slips.
All the other positions seem to work fine. If I am going up and put it in 2nd the truck kinda sits there waiting for instructions. It seems to be starting the same type situation in reverse. I put it in reverse and it sits until I give it more pedal than I think I should have too.

I hope some one comes on line with help.

Commo

 

Hi Common,

My truck is also slow to respond in 1st.

I got an MLPS from the local Ford dealer with the agreement that I could bring it back as long as I didn't install it. The usual rule of thumb is, "If you walk out the door with an electrical part you own it."

I got out my multi meter and tested each of the eight terminals against every other terminal in every gear position. My truck is a six wire MLPS. What I found goes like this:

(1) Terminals 32 and 33 are shorted in the Neutral and Park positions. That cuts through a circuit to the starter so that the truck can only be started in Neutral and Park.

(2) Terminals 463 and 57 are shorted in Neutral. It looks like that operates a switch in the Transfer Case so that the Transfer Case can only be shifted into Low Range while the Transmission is in Neutral. It must be a saftey feature so you can't shift into Low Range while in any other gear including Park.

(3) The other two terminals included in the six wire configuration are 199 and 359. These two leads go to the PCM which seems to be the Powertrain Control Module. Every gear position connects these two leads together but with a different resistance value for each gear. The resistance values are as follows:

Park: 4.2 ohms

1st: 87 ohms

2nd: 211 ohms

Drive: 402 ohms

Neutral: 735 ohms

Reverse: 1450 ohms

After I figured all that out l climbed under my truck and ckecked to make sure that the two lines on the MLPS were lined up in Neutral as they should be. They were lined up. Then I shifted the truck into all of the other gears and marked each position on the MLPS where the moveable portion of the Neutral line up line came to rest. Then I removed the MLPS from the truck and tested it with my multi meter. All position measurements were exactly the same as on the new MLPS. I reistalled the old MLPS and adjusted it so the Neutral line was adjusted properly. Why spend $116.00 if it's not neccessary.

Today I took the truck to a transmission shop and they said the first thing they would have done would be to replace the MLPS. I instructed them not to do that even if my MLPS was bad. It might be bad because anything is possible. But when I tested it I moved it back and forth several times and tested it several times.

We had talked about looking at the manual valve in the transmission but rather than calling me to tell me it would be a minimum of $250.00 and giving me the opportunity to say yes or no they put it back together with a new filter and fluid. The fluid looked and smelled OK and no metal in the pan.

Tomorrow I'm going to try to talk to the lead mechanic at the Ford dealer who I understand is a real nice guy and will probably be willing to spend a little time with me if he's not to busy.

This is not rocket science. Somebody, probably lots of people, have run into this and can point us to the trouble rather than changing out everything you can think of and running the bill up while not really knowing what to do. Or maybe the best will happen and someone on this site will have the answer.

Until something new to report,

Stay/W/It