So I've been trolling here awhile but finally signed up. This is my first big block F350 but have had several 150 gassers, and several diesels in the OBS. I got a 95 F350 I just bought, 460 2wd dually Centurion with the E4OD. When I test drove it, it seemed fine but that changed quick. The guy I got it from kept it in storage during winter months so I got it from storage. I knew the cruise didn't work. Well soon after starting to drive it the torque converter started to lock and unlock so I found this page and did the usual points, changed TPS, VSS, tail lights, 3rd brake light, etc. Took it to my trans shop and its hit and miss when it does this and he couldn't get it to do it. He changed fluid and filter and said it looks great inside. I can lug that 460 til its guts hang out and it'll stay in but I may be cruising at 45 and it'll go in and out 10 times....its odd. After I did a tune up(plugs, wires, cap and rotor) it threw a CEL on the test drive....637 which is Trans Temp Sensor over voltage....makes no sense that it would just now throw that as soon as I tune it up. Truck has 75k miles. I'm pulling my hair out. Pulling a trailer makes no difference....uphill, downhill, its just random. My trans guy hasn't seen that sensor fail and he's been doing transmissions and he's a ford guy for a long long time. I also don't want to replace the solinoid pack just to replace it if I don't need to. I think if it comes to that I'll ZF5 swap it like I want to anyways. Thanks for any help!

 

Well if this was a KOEO self test code 637 then:
Possible causes:
-- Fluid levels not to specification.
-- Damaged TFT sensor.
-- Open harness circuit(s).
-- Damaged Powertrain Control Module (PCM).

Note that a KOEO self-test is an electrical voltage in the ballpark test. It has nothing to do with the any mechanical items. It just checks fuses, wiring, relays & sensors.

If this code was found in CM (Computer Memory) then it is a different story.
That is why you need to tell us where the code came from, KOEO, CM or KOER.

 

KOEO with an OBD1 reader. Sorry I forgot to list that. This thing is driving me insane chasing could-be's of what the cause is.

 

did you inspect and clean the solenoid pack plug yet?
since she's been sitting,perhaps all it needs a good cleaning with electrical cleaner,followed by a bit of dialectic grease.

 

KOEO DTC 637 indicate the TFT sensor output is greater than Self-Test maximum value of 4.8 volts.
Possible causes:
-- Fluid levels not to specification.
-- Damaged TFT sensor.
-- Open harness circuit(s).
-- Damaged Powertrain Control Module (PCM).

Then check:
Key off.
Disconnect transmission connector. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
Insert a jumper wire from the TFT circuit to SIG RTN circuit at transmission vehicle harness connector.
Run Key On Engine Off Self-Test.
Is DTC 638 present?

 

Are you all referring to the plug on the passenger side of the trans?

 

Yes that is the only one it has.

The one on the other side is just a plug for the TR sensor and dose not operate the transmission. It just sends information to the PCM Computer to tell it what gear you are in and brakes the starter relay wire and also operates the back up lamps.

 

Speaking of electrical gremlins....where or what does this green wire go to? It had a wire spliced to it that went back under the cap that was on the truck when I bought it



Also what is this? Its hanging under the dash on a bracket. It appears to have been hooked tp something by the wear marks on the prongs but is currently unhooked.

 

Here is a pic of what I'm working on.....pretty but has some bugs to work out

 

F2TB-10D840-AA = F2TZ10D840B .. Seat Belt Warning Light Chime (Motorcraft SW2305)-Use with Decor Group & key in ignition chime.


Cut from this thread: Black Box Ford p/n VF2TB-10D840-AA - Ford Truck Enthusiasts Forums Post#2

 

I found that right after I posted that. I was just to a buddies junk yard and looked but he doesn't have any big block trucks. I looked at a few small block trucks and cannot find that green wire on their main harness like the 1 I showed in the picture of mine. The green wires are coming from the main harness that comes out from under the power block on the drivers fender.

 

There is no just green wire in the harness going to C101 engine disconnect plug.
The green wires that are in there are circuit 354 LG/R for the coolant temp sender, 198 DG/O for the A/C Pressure Switch to control relay and the 560 LG/O wire that is used on the trucks with SFI.

 

When I get home I'll clean them real well and double check but you can see the two green into one with that factory splice in the picture. I didnt see a tracer.

 

Here is the pin-out of C101:


/

 

It looks like both wires go under or into the power distribution box, not the plug but I'll get a closer look. Thanks for the pin out diagram.