Today I replaced my bad E4OD with a newer model, the installed transmission came out of a 1994 model. After all the work of getting removed and replaced the truck won't crank. It starts with the screwdriver on the starter solenoid and runs but just won't start with the ignition switch. The newer transmission seems to be working a bit jumpy when shifting but guess will give it few days. I'm using the new MLPS that came out of the old transmission and replaced the plug with the new style. The truck was starting normally with the old transmission. The only change I did was to replace in the harness the plug that goes in the solenoid pack because had burned/melted wires. I use wire clamps and one by one. One thing I noticed is that the solenoid packs look different. On the old one you could see all the electrical components it had no cover. The newer one had a cover. My question is if the change from a 92 to a 94 should be a plug and play thing or there's more involved. I was told plug and play should work from 1992-1994. Any comments will be appreciated.

 

You need to make sure the MLPS is aligned correctly, if it is a little out of adjustment the computer will not recognize the trans is in Park or Neutral and it wont let the truck crank. That is where I would start at is the MLPS

Matt

 

And are you sure it isn't the starter solenoid that failed?.

 

Solenoid is different 1993 on, needs to be swapped. Also MPLS is probably not aligned correctly.

 

Thanks explorerst4x4, When I originally started posting I was told that I could use 1992-1994 plug & play, guess that was not the case! I went ahead and done it without swapping the solenoid pack. They look different, the 94 has a cover, the 92 doesn't. I started the truck with a screwdriver on starter solenoid, warmed up and worked, drives a bit rough.

Weather permitted will drain again ATF, swapp solenoid pack and go over again the MLPS alignment. Will also check continuity on all wires for the solenoid pack connector as I had to wire clamp one for the original burned-melted on the end for not having the heath shield next to the exhaust installed.

Thanks for the help!!!!

 

The MLPS design was changed in 1995. Obviously someone has changed the original MLPS.

The solenoid packs are electrically the same for 1992 and 1994 model years.

 

Yes, I done it...got new MLPS and replaced plug with new design. Was working fine before transmission failed. Using this MLPS and plug on the newer transmission.

 

The solenoid pack and its wiring has nothing to do with the engine cranking.
The diodes were moved from the solenoid pack to the computer in 1995.

You need to align the MLPS or as it is now called the TR sensor.

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Thanks subford ....Now, correct me if I'm wrong. When installing the aligned MLPS in it's place the shift selector should be in "N" that's how I done it but will re-check.

 

Yes it has to be in "N".

 

The start wires should be the same. They are boxed in red in the diagram below.
However the wires are not, namely the ground wire:



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A new issue with my transmission swap. Haven't been able to work on reviewing the MLPS installation but a new issue was noticed. Before the transmission was installed there was a couple of parts that bent and broke when the newer transmission was dropped. The oil pan bent, broke the filter (no big deal, got a new one) but this part below had to be replaced with the old one because a broken pin:



I have no idea how this part is called or how that should've been replaced. The problem now is that when you shift gears inside the cab it feels weird. It's like you can't feel the clicks from gear to gear and at some point was really hard to shift. This part is connected to the shifter mechanism for the MLPS and is currently where I'm having trouble adjusting

I'm pretty sure something wasn't replaced properly and I wasn't paying enough attention to this process.

If any of you could let me know how this part is called and where I could find a diagram to check.

Thanks!!!

 

The shifter cable is the most probable cause of your problems with the shifting, if it's hard to shift then stop doing it, because you will break the shifter tube and then things will get ugly... replacing that thing is a pain... release the shifter cable on both ends and see if it's broken. From my experience, if it failed, it will be broken at the tight turn it does right under the dash before exiting the cab.

 

I believe that's called a detent. It should have something that engages the teeth to give a positive feel between each range selection.

 

Yes it is called the Inner Detent Lever:


If you want more information on replacing it download this PDF:
http://downloads.bustedfingermotorsp...nuals/E4OD.pdf

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