Hard shifting E40d
FTE Chapter Leader
Joined: May 2006
Posts: 12,342
Likes: 1,315
From: Central Mississippi
You plug it in, display lights, needle swings with motion, trans shifts better.
Or it does the same thing or nothing.
I got a half dozen I've run through my cluster over the years.
Or it does the same thing or nothing.
I got a half dozen I've run through my cluster over the years.
Logistics Pro
Joined: Aug 2014
Posts: 3,567
Likes: 852
The MLPS is from the parts 94 that I also used the computer, harness and shift solenoid from. So, I have not replaced it with a new one but have checked the adjustment on it to make sure it was properly aligned. The whole intermittent problem I have leads me to believe that something is sticking. If it was a "malfunctioning" part or sensor, why does it often stop shifting weird when I stop and shift in and out of gear? That is why I am thinking that it is a dirty/sticky shift solenoid or valve body. But, I am not a transmission guy by any means. I do appreciate the suggestion though, I knew I would get some solid info on this site.
Water gets in, corrodes resistors, poor connections that heat up/cool down, you now have an intermittent problem.
It stops shifting weird, because your moving the MLPS and 'cleaning' the connection from corrosion.
My truck had this bad when the roads were wet, not so much when dry out.
Have you tested the MLPS?
Fleet Owner
Joined: Jul 2006
Posts: 20,376
Likes: 843
From: Mi'kma'ki
I have a hard shifting problem on my '95 F150 with 302 and E4OD. This just started, had been shifting just fine for many years. I am getting code 452 but the speedo works just fine so I am assuming this means the sensor in the rear-end is OK? How do I test the signal going to the trans to see if the PSOM is the problem?
Just because the speedo is working fine, doesn't mean there may not be a problem with the VSS. It may need a cleaning or replacement. The odds are highest of the VSS being bad, when you get this code. I got it years ago, just after installing a dump bed and the dump hoist pitched my wires. I had to work the truck some slow and easy that day haha.
Yes.
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