okay so for the time ive owned the truck occassionally the truck would randomly go into netutal while its still in drive, id pull over put in park put it back in drive and be on my way like nothing happened. Today it did it again although i pulled over and i put it in park it grinds i killed it put in park let my foot off the brake theres no park, started went through every gear nothing , still grinds in park though . Anyway i get a tow and as he is towing it in park because it had no park before it catches while its being winched. Tow it home get it on the street put it in gear like nothing ever happened it shifted alittle hard though. Any help is appreciated.

 

Which auto does it have?
How many pan bolts?

 

20 bolt
E4od 4r100

 

The MLPS on the side of these transmissions can cause some funky stuff. I had a dirty connection on my Bronco's trans and it would intermittently act like it went into neutral but it never would stay like that, it would just slip and then slam back into gear. That could be a cheap and easy place to start, you could try adjusting it before replacing (there's "timing" marks on it that you line up when trans is in neutral). And the not going into park thing really sounds like a mis-adjusted shifter cable but I'm pretty sure on these models there no adjustment down on the cable end like the newer models have. Do you have a loose feeling shifter or is it nice and tight like it should be?

 

Never always firm

 

sounds like the selector cable nut came loose on the gear selector linkage/mlps sensor.
inspect the linkage.it's on the passenger side of trans.you'll find your issue there.

 

Will do , i posted another thread stating we adjusted the mlps and cleaned the connections. Dtove it alittle bit it wont shift unless your rpms are pass 2500rpm. And when it does its extremely hard. The o/d off light is flashing as well. I changed the vss about a month ago if that helps. Also on the highway when it was not broken it wouldnt know to shift to overdrive or keep it in 4. And when it did it shifted very hard. Any help is appreciated.

 

Update getting codes 634 and 654

 

Code 634: Transmission Manual Lever Position Sensor circuit out of self test.

Code 654: MLP sensor not in park position.

Looks to me like your MLPS "adjustment" created more problems.

A visual from Steve83:


Snagged from his Super Motors page: http://www.supermotors.net/registry/media/81709

 

I guess so any suggestions , i was gonna replace the mlps. Mine also looks different. I have a 95 e4od the sensor is vertical.

 

The alignment procedure is the same. Before your truck was "neutraling", which is a very common symptom of a faulty MLPS. After you adjusted it things have gone from bad to worse. If it were mine I would replace it.

Here is a pic that probably looks more like yours:

 

Okay ill go ahead and replace it . While ive got your guys help, i also get codes 121 and i already replaced tps, i also get evr solenoid fault, and secondary air system bank 1 fault .
Lastly my steering has play it sometimes has turning right others its left and others its were ever . I know its alot any help appreciated.

 

just some added info.to adjust that sensor,you line up the marks as noted in the pic,and then you place the trans in N not P when you tighten it down.

now,if your experiencing issues with the shift lever mechanism,then you may have broken the internal detent spring.to fix it,you'll need to drop the pan.pick up the peice that broke off down in the pan,and the other end will still be held in place by the bolt.

if you need one,google: e40d detent spring. or try e40d spring arm and roller.

use caution next time you replace the MLPS so it doesn't happen again of course.
while replacing the mlps,and since you may be replacing the manual shift dentent spring,you may want to go ahead and find N,line up the MLPS and install it all while the pan is still off.then go ahead and place the pan back on and fill with atf.

im not sure,but it seems like i recall the tps line coming from the mlps.so this might explain code 121.i could be off and it's unrelated.i can't remember all this crap haha.regardless,just focus on the most obvious issues at hand first anyway.once the shift lever and mlps is all resolved and if you do in fact still get a tps code,then tackle that one when you get there.1 step at a time.

remain in one thread is always a good idea.
however for steering questions,since that's completely unrelated,should be in a new devoted thread.

 

DTC 121 indicates the Throttle Position (TP) sensor's rotational setting may be out of Self-Test range.

Have you checked the TPS output with a meter (DVM)? It should be between 0.6 to 1.0 VDC with the throttle closed. Reference this: Fuel Injection Technical Library » Throttle Position Sensor (TPS)

What is the "evr solenoid fault" by number and when was it displayed?

What is the "secondary air system bank 1 fault" by number and when was it displayed?

Loose or play in the steering has many causes, many of which are rarely discernible by eye. Tug, pull on the tie-rods and other linkages. Jack the truck up pull on the tire/wheel assembly from top to bottom to check for ball joint wear. Pull side to side to check for loose wheel bearings/steering component wear.

 

Thanks for the help, I replaced the mlps today and truck started Im not able to drive it however because the shift linkage now has an issue as shown in this pick

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Tps i checked the voltage its within range i replaced the sensor about a month ago.
As for the Evr code its 558 and i got it during KOEO
I believe the air injection code was 311 got it during KOER
Steering I will do what you suggested however the truck has a 3inch body lift and the play in the steering doesnt move any suspension parts just trying to help.