E40d slipping gears?
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E40d slipping gears?
I got a 1997 f350 dually 7.3 powerstroke with a new reman e40d with a bank trans controller just the details about the truck. When am driving usually only happens in 4th or overdrive and when rpms are above 1500 but can also happen randomly mostly in that range tho. The truck feels like it falls into neutral like I can Rev my rpm up and it won't acceleration. Sometimes if I keep on reving it it "catches" back into 4th but most times I have to come to a complete stop then go and it starts back in 1st
replaced mlps and checked wires no visible problems there
3rd brake light works
fluid is good too
Another thing is my gear selector can be wiggled from the very left side of the D indicator to the very right side of it. It seems from my limited experiment that if I wiggle it onto the middle of the D it dosent seem "slip" if that makes sense that could also be part luck I guess.
can't scan codes odb2 port dosent work.
Any tips or suggestions will be much appreciated thank you.
replaced mlps and checked wires no visible problems there
3rd brake light works
fluid is good too
Another thing is my gear selector can be wiggled from the very left side of the D indicator to the very right side of it. It seems from my limited experiment that if I wiggle it onto the middle of the D it dosent seem "slip" if that makes sense that could also be part luck I guess.
can't scan codes odb2 port dosent work.
Any tips or suggestions will be much appreciated thank you.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
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From: SE Florida
Replace the Manual Lever Position Sensor (MLPS.) It is located on the driver's side of the trans. It is the part with the wiring harness attached. As it wears it can send a false signal to the PCM that you have moved the shift lever to N.. The PCM then sends the trans to N, and you get what you have been seeing.
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Replace the Manual Lever Position Sensor (MLPS.) It is located on the driver's side of the trans. It is the part with the wiring harness attached. As it wears it can send a false signal to the PCM that you have moved the shift lever to N.. The PCM then sends the trans to N, and you get what you have been seeing.
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Hey Mark I just remembered one more thing my reverse light dont work not sure if it the bulbs or not. I think it's not the bulbs since the wiring at the back is a rat nest brakes light still work tho.
thank you for your help
thank you for your help
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
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From: SE Florida
As for starting in any gear, that means that whoever installed the push button start bypassed the MLPS, making this very dangerous.
Another possibility is the PSOM is starting to fail. That's the module on the backside of the instrument cluster. It sends vehicle speed data to the PCM, which decides what gear the trans should be in. Does your speedometer bounce, or otherwise do things it shouldn't do?
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Another possibility is the PSOM is starting to fail. That's the module on the backside of the instrument cluster. It sends vehicle speed data to the PCM, which decides what gear the trans should be in. Does your speedometer bounce, or otherwise do things it shouldn't do?
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
A junk yard PSOM is probably no better than what you have. There are places that rebuild them. I don't know any of them.
The TPS is another possibility. I've seen them wear out and cause issues.
The TPS is another possibility. I've seen them wear out and cause issues.
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do you know of a way to test to see if my psom is going bad? Or is that a scan tool job?
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thank you Mark I'll check those things out probly won't have time to do so this weekend do you think me driving the truck could cause any damage to the trans with me driving it with the issue?
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
Probably not.
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another thing I forgot to mention when it happens and it puts itself into neutral when i come to a complete stop somtimes it wont shift out of 1st or 2nd. I can manually put it in 2nd and 1st by the gear selector. Just moves the truck but no shift. Is this limp mode probably right? Cause by whatever is happening?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,661
From: SE Florida
Are there any codes stored in the PCM?