Went out this morning to move my truck around. Reverse seems fine, I put that sucker in Drive and take off and it feels like your holding the brake pedal down, and taking off. I hit the pedal real hard and got a bunch of black smoke but it just would barely move. I think OK brake sticking? Well I drop it down into 2nd gear and it seems to take off fine...What freaking gives? What can I look for to figure out the problem? I'm hoping the transmission isn't going out on me! This happens the day after I let someone else drive my truck.

I think I will start off by jacking it up and double checking the brakes and emergency brake cable.

Today it was sort of cold out, I dont think that has any effect on my problem. Would a clogged transmission filter cause this problem?

 

Fluid is full, fluid is still nice and red.

Got some news I didn't want to do this but I drove it down out dead end road, the truck is stuck in a high gear, it didn't shift at all on me. I think to check the Shift points and this is what I got. At idle its at 1.24 and WOT its 3.63???????HMMM Think the TPS is bad?

I cant tell what gear it is in, lets assume OD. I have no blinking OD light either. I put that sucker in 4x4 low it felt fine only because of the low gearing, but in 4x4 high I'm getting the slow take off. Like taking off in a high gear in a 5 speed or similar. What could cause it to not shift down, why is it stuck in a high gear?

 

if it takes off fine in manual 2nd,then it can in auto 1st too (D) as far as eliminating the sticking brakes i mean.
get your thinking cap on.it's time to diagnose electrical issues.

so it does move,but just barely.so lets assume for now,that the trans is trying to take off in 4th (OD) gear.

you lent your truck out.did your friend drive off road,in water/mud etc?
at any rate,start by removing the solenoid pack plug and inspecting the wires and plug itself.clean and then apply bulb grease and plug back in.

edit,
just saw post #2.
STOP doing what your doing if you want to keep your transmission.
put her in manual 2nd and drive it slow and easy back home.

 

I only took it right up the road to see if it WOULD shift. Only did it once. It is at home right now. The friend said it drove fine yesterday, he just drove it not even a mile up the road. then this morning started the problem.

I am getting voltages from the TPS and its steady reading from idle to WOT so I guess I can throw the TPS out as a problem.

Ill get under the truck and inspect all connections and grease them up. Should I back up and down the drive way again to check to see if the problem goes away or what else should I do?

Yes the truck will move, its just something with the automatic shifts. I hope it is something I can fix.

 

it is a problem you can fix.it's most likely a bad EEC relay.

 

Where is it?

 

Sorry for the crappy cell phone picture. I kept trying and trying with no luck to get a clean picture.

This is the plug that plugs into the passenger side of the transmission. I took it up over the top so I can get more slack out of it. It looks like all the wires are bare about 1 inch back coming out of this connector. Could this cause it? Can I find a new end for it, or will I have to fab things up?

 

that's most likely the issue yes.start by repairing/replacing that plug for sure.
all those wires are from the brain to all the solenoids in the trans.its imperative to have all these connections flawless.
what your posting is actually a very common occurrence.
when repairing/replacing,make sure all connections are weatherproof heat shrink connections.

 

 

yeah.she won't work too good for ya like that.
you can ease your friends mind,by telling him he's at no fault.he was just the lucky one who happened to be driving when your wires jiggled just right to finally cause the issue.

# 36445EK
Wiring harness repair kit, E4OD, 1989-94
External Wire Harness, Plugs Into Connector …. Common brands - Various
http://www.bulkpart.com/Merchant2/me...-4R100solenoid

or
http://www.trannybuilder.com/store/p...roductid=18894

here's a nice deal with heat shrink;
http://www.transmissionpartsusa.com/...-00026389a.htm

 

You think any local parts stores would carry something like this?

 

Well all that work for nuttin..Someone keeps telling me about a relay that could be bad, BUT WHERE?

 

yeah,but where? good question.this i don't know.
im sure david85 has posted their locations a time or two,if you advance search "relay" with username "david85" you'll probably find it.
i know there's relay's in the under hood fuse panel (which is where id guess they are) but i don't have a diagram for this panel.

repairing/replacing that plug wasn't for nothing though.you couldn't leave it like that regardless.your doing it right.fix the obvious (and free stuff) first.
besides,those wires shorting out,could have been what took out your EEC relay (if that turns out to be bad) in the first place.
did you find one of those replacement plugs locally?

 

I found out where the relay was, by the relay box well behing it, there is two relays seperated and one is the ABS and one is the ECC relay. Swapped the two around beings my ABS is bypassed. Still have the same results. Would a bad or misaligned mlps cause this?

 

here we go:
Bulletin: #125

so test for voltage at the solenoid plug.where your wires were bare.it says pin #1.
also shows the EEC relay location.
(and '92 owners should note the diode location.)

i don't know as if a bad MLPS would cause an OD start symptom.usually she'll pop into neutral on ya when those fail.
i hope you didn't fry your solenoid pack due to those bare wires.
making sure you have voltage at pin #1 is where id test next.

here is info on testing the MLPS.
it does say they can cause a wrong gear start.so i guess this includes 4th too then right lol.
what the heck.it can't hurt to test that next:
http://www.transonline.com/transDige...ers/index.html

fyi,
should that test bad,they now make a better weatherproof plug on replacements.so be sure to get the updated version with the plug adapter.
of course while testing,be sure to clean and inspect this plug too.it doesn't want to look like your solenoid pack plug did either.

keep at it.you'll find the problem.doing good.