E-Series VansTechnical discussion of topics related to vans powered by any of the Navistar engines. This covers a broad number of years, but there isn't enough demand to split it any further.
At different intervals the OD light blinks and when this happens the trans does act differently. It almost appears the converotr is slipping, it also hunts for the proper gear given a certain situation(load, hill, throttle etc). Once on the highway and it does shift into OD it runs fine, but shifts harder when this light does begin to blink.
I think I will have the dealer change the fluid and flush the trans to start.
Thanks for an ideas.
John
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92 F350 xlt, 4x4, auto, utility body, 268k miles
Blinking light means the trans is getting a reading from a sensor telling the tranny to go into high pressure mode, which is just limp home mode essentially. Now this is supposed to work in the following way.
When something blows up in the tranny the sensors tell the computer which makes the tranny go into a mode to protect itself from further damage. What happens often is these sensors go bad and give faulty readings. Your job is to find the faulty sensor and replace it.
The TPS which is on the injection pump is a usual suspect. Also the Tach sensor is a usual suspect. Others can be the VSS in the rear differential, along with low fluid level, and maybe something else that i've forgotten. To replace the TPS on a van is not easy. Takes me about an hour or more. I have to take the fuel filter off just to see it. It's on the drivers side top of the injector pump.
It should be set to 1.000Volts at idle. Replace that and see if your problem goes away, if not start replacing other sensors.
If you don't want to trouble shoot like that you can take your truck in and have the codes read off the tranny computer which should tell you whats wrong with it. But alot of times it'll tell you a sensor is bad but it's actually another sensor. For instance if your tach sensor goes bad it may say your TPS is bad.
is there a seperate cpu for the trans? Where is the connector for this? (near the pass side hood hinge?)
Other than the helm (90 bucks and probably well worth it), is there another manual I can pick up that has these sensor locations clarified. BTW- I have the haynes diesel manual, I'll look in that tomorrow.
If I wanted to put a tach in this truck how involved is that?
John
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92 F350 xlt, 4x4, auto, utility body, 268k miles
Have the codes checked, the most common problem is a slipping torque converter. If you get it checked out and repaired before it completely packs it in, it will cost you a lot less.
Manual Lever Postion Sensor is the one Erik forgot and mentioned by av8. It's on the tranny where the shift linkage connects.
Some one on this site has a trouble shooting file that has procedures for testing each of the sensors. I got it, but I can seem to open the Word files anymore. Try posting in the IDI section for those files.
I will clean connector and check linkage as it does feel sloppy.
I spoke to a local trans shop that my family has known for 35 + years. he mentioned that in 89-92 there mere major software re-codes on the cpu, they are bought outright and not flashed. Re flash begain 94 and later. He also mentioned that the trans itself has mechanical upgrades needed as well. His ball park was 2500 plus the new CPU.
I looked on a few diso**** Ford parts sites you can buy an e4OD for 1900.00
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92 F350 xlt, 4x4, auto, utility body, 268k miles
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