1998 Ford Ranger transmission fluid pump not pumping

Tiny
JONATHANFIX
  • 1998 FORD RANGER

Transmission problem
1998 Ford Ranger 6 cyl Four Wheel Drive Automatic

I recently replaced my engine. We pulled the engine and transmission out together as it was easier then dropping the transmission from underneath the truck. We replaced the fluid and filter. We put everything back together and the engine fired right up but when I shifted it into gear it didn't go anywhere and the rpm's stayed the same. To determine if the transmission fluid pump was pumping we disconnected one of the lines into the radiator expecting to see fluid squirt out when the engine was running. It did not. I've heard that there might be a special way to prime the pump. Is that true? How do I fix this?

Do you
have the same problem?
Yes
No
Tuesday, February 23rd, 2010 AT 8:08 PM

42 Replies

Tiny
JONATHANFIX
  • MEMBER

Could it be electrical? The computer codes are indicating that there's a problem with the air intake flow sensor (the wire harness on the new engine didn't have a connection for this sensor) and another code indicating something else that I don't quite remember. There's solenoids in the transmission, right?

Was this
answer
helpful?
Yes
No
Tuesday, February 23rd, 2010 AT 11:11 PM
Tiny
JACK42
  • MEMBER

Its possible, would be nice to know the other code. If the converter fell out a little during the swap it may not be driving the pump.I personally have never heard of or had a trans pump "lose its prime"

Was this
answer
helpful?
Yes
No
Wednesday, February 24th, 2010 AT 8:15 AM
Tiny
JONATHANFIX
  • MEMBER

There was a slight difference in the wiring harness. It did not have a connector for a sensor on the air intake. Therefore one of the codes is for the "intake oxygen temperature sensor". The other one is for "cam sensor bank 1". That one doesn't sound to good.

Was this
answer
helpful?
Yes
No
Wednesday, February 24th, 2010 AT 10:27 AM
Tiny
JACK42
  • MEMBER

You need to use the original wiring harness first. Neither one of those codes will keep the trans from working

Was this
answer
helpful?
Yes
No
Wednesday, February 24th, 2010 AT 10:45 AM
Tiny
JONATHANFIX
  • MEMBER

Why do I have to use the original harness? What does the cam code mean?

Was this
answer
helpful?
Yes
No
Wednesday, February 24th, 2010 AT 2:53 PM
Tiny
JACK42
  • MEMBER

Because that is the harness that matches the vehicle and the computer in it. That is why the harness on the other engine doesnt match up the same. Do you have the exacxt "P" number for the cam code so I can look it up. Is this a OHC or OHV engine? I have never seen a cam sensor bank 1 code before

Was this
answer
helpful?
Yes
No
Wednesday, February 24th, 2010 AT 4:17 PM
Tiny
JONATHANFIX
  • MEMBER

The exact error codes are:
1) P0340
2) P0113

Was this
answer
helpful?
Yes
No
Thursday, February 25th, 2010 AT 9:09 AM
Tiny
JACK42
  • MEMBER

Did you swap the wiring harness back to the original one yet?
Sorry, my bad need to know if it a 3.0 or a 4.0

Was this
answer
helpful?
Yes
No
Thursday, February 25th, 2010 AT 7:18 PM
Tiny
JONATHANFIX
  • MEMBER

I have not swapped the harness yet. I will probably get it done this weekend. It's a 4.0L V6 XLT 4x4 1998.

Was this
answer
helpful?
Yes
No
Thursday, February 25th, 2010 AT 8:23 PM
Tiny
JACK42
  • MEMBER

P0113- Temp sensor (IAT, ECT) this could be the connector you dont have aspot for ontheintake (IAT Intake Air Temp) is the coolant sensor plugged in?

P0340- CMP Sensor. Camshaft position sensor. Is this plugged in?

I suggest going back to old harness, and being sure everything is plugged in before trying to diagnose these issues

Was this
answer
helpful?
Yes
No
Friday, February 26th, 2010 AT 7:22 AM
Tiny
JONATHANFIX
  • MEMBER

Well, we don't have the old harness back in yet but I have determined that the CAM sensor in the new harness was a 2-wire sensor while my computer was expecting a 3-wire (Hall-Effect) sensor. We replaced the sensor on the new engine with the sensor from the old engine (which fits the original harness). Could the CAM sensor error code disable the transmission? Or maybe it's just a subtle difference in wiring to the transmission?

We're going to replace the seals on the exhaust manifolds before we put everything back together again so it may be a few days before we know if this worked or not.

Thanks for your help! Is there a way to donate more at the closure of my issue?

Was this
answer
helpful?
Yes
No
Tuesday, March 2nd, 2010 AT 10:44 PM
Tiny
JACK42
  • MEMBER

The cam sensor wont keep the trans from working. Definitly look for any differences in the connectors (pin count) at the trans to see if that is the problem. Little changes are made from year to year

Was this
answer
helpful?
Yes
No
Wednesday, March 3rd, 2010 AT 7:15 AM
Tiny
JONATHANFIX
  • MEMBER

Well, we finally got the old harness on the new engine. It turned out that the cam sensor the computer wanted was a three wire sensor while the sensor on the engine was a two wire sensor. We put the sensor from the old engine on the new one. With the old harness on now we eliminated the P0113 code easily but we still have the cam sensor code. I suspect that's because we didn't put much care into aligning the sensor. Appearantly, I need a special tool.

Was this
answer
helpful?
Yes
No
Wednesday, March 3rd, 2010 AT 8:40 PM
Tiny
JACK42
  • MEMBER

Get #1 on top dead center. Install the CMP so that the vane on the shaft lines up with the aligning slot on the outer housing, that is where it is supposed to be. Then reinstall the sensor and it should run

Was this
answer
helpful?
Yes
No
Thursday, March 4th, 2010 AT 7:29 AM
Tiny
JONATHANFIX
  • MEMBER

Ok, now we have no more error codes but the transmission fluid still isn't pumping. I don't know what to do next!

I really appreciate your help. How can I donate more?

Was this
answer
helpful?
Yes
No
Friday, March 5th, 2010 AT 8:07 PM
Tiny
JACK42
  • MEMBER

Contact Mike@2carpros. Com

I take it the fluid level is correct?Sorry, have to ask. Did you swap just the engine or both? If both, did the torque converter happen to pop out of the trans a little? When you put the engine back in, was there a small air gap between the engine flexpalte and the torque converter?

Was this
answer
helpful?
Yes
No
Saturday, March 6th, 2010 AT 8:19 AM
Tiny
JONATHANFIX
  • MEMBER

Don't worry, I understand about your fluid level question. Trust me, we've been questioning everything we've done. It seems like the torque convertor hasn't been installed properly. Even though it seemed like everthing went back together just fine when we did it it seems like the torque convertor wasn't installed right. I'm reading through one of those Chilton guides and it pretty much describes exactly what is going on with my truck.

Was this
answer
helpful?
Yes
No
Saturday, March 6th, 2010 AT 3:34 PM
Tiny
JONATHANFIX
  • MEMBER

The Chilton guide describes a process of pushing and turning at the same time on the torque convertor until you hear a couple of clicks. That's about all it says. Do you have any more specific directions or hints with pictures or diagrams?

Was this
answer
helpful?
Yes
No
Saturday, March 6th, 2010 AT 3:50 PM
Tiny
JACK42
  • MEMBER

If the converter was all of theway in, there will be an air gap between the flexplate and converter. If there wasnt a gap, the converter isnt all of theway in. You will have to remove the engine or trans to install converter. Hard to tell if any damage was done until it is done correctly and you see if it works. If the converter is all of the way in, you cant get your fingers in behind it when grabbing from front.

Was this
answer
helpful?
Yes
No
Sunday, March 7th, 2010 AT 8:31 AM
Tiny
JONATHANFIX
  • MEMBER

Well, we dropped the transmission again today. The torque converter is still attached to the vehicle though(I believe the part it is connected to is the flex plate). The Chilton guide shows the installation of the comverter removed from the vehicle. Do we need to remove it and then install it using the "push, turn and click" method to the transmission or is it ok to leave it on the vehicle?

Was this
answer
helpful?
Yes
No
Sunday, March 7th, 2010 AT 7:28 PM

Please login or register to post a reply.

Related Transmission Gear Selector Questions

Recommended articles