Can't believe it worked!
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Elder User
Joined: Dec 2003
Posts: 610
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From: socal
Can't believe it worked!
The other day stuck in traffic in the summer heat, the E4OD in my 97 F450 freaked out on me. I thought the converter was letting go, it would rev up then slam into gear, then act normal for a bit. Once I pulled off the freeway and let it cool completly it was ok but has a deep rumble/viberation at idle and at times would run through all three gears and into OD 1/2 way through the intersection.
Long story short, my back up truck was still in the shop and I needed the truck so I poured a bottle of Lucas no slip stuff in it and have been running it for a week with zero issues, even in the heat with a couple 5,000 lb. loads.
I have written the TC and possibly the trans off and will find out what happened next week when it goes in the shop.
I just can't believe that stuff worked!
Long story short, my back up truck was still in the shop and I needed the truck so I poured a bottle of Lucas no slip stuff in it and have been running it for a week with zero issues, even in the heat with a couple 5,000 lb. loads.
I have written the TC and possibly the trans off and will find out what happened next week when it goes in the shop.
I just can't believe that stuff worked!
Lead Driver
Joined: Sep 2003
Posts: 7,018
Likes: 210
From: SoCal
Just curious, did you check the obvious, ATF level? If it was low, a bottle (quart?) of fluid would have helped as well.
I've seen more than one car puke ATF under load during hot weather, and they quickly start to slip.
I've seen more than one car puke ATF under load during hot weather, and they quickly start to slip.
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Elder User
Joined: Dec 2003
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From: socal
ATF was fresh, flushed the trans about 2k ago and check the level daily. No flushing did not cause it, been doing it regularly after it was rebuilt over 100k ago.
At the time the truck was empty and had not worked hard all week.
No OD flash, that was the first thing I looked for when it happened. Fleet center said they will pull codes when I get it in, TC was my best internet educated guess.
What is the MLPS and any ideas on the vibration?
I like my old F-Super but am kind of out growing it and it is tired been thinking Ram 5500 but add one more zero and you get the price 55,000 !!!
At the time the truck was empty and had not worked hard all week.
No OD flash, that was the first thing I looked for when it happened. Fleet center said they will pull codes when I get it in, TC was my best internet educated guess.
What is the MLPS and any ideas on the vibration?
I like my old F-Super but am kind of out growing it and it is tired been thinking Ram 5500 but add one more zero and you get the price 55,000 !!!
Senior User
Joined: Jun 2012
Posts: 178
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From: S.E. WI
7DF250, what engine have you got in there?
MLPS = Manual Lever Position Sensor, symptoms include engagement troubles and wrong gear starts, if I recall.
E4OD solenoid packs are pretty reliable but if symptoms are related to ATF temps of 200+ I would suspect a bad one.
MLPS = Manual Lever Position Sensor, symptoms include engagement troubles and wrong gear starts, if I recall.
E4OD solenoid packs are pretty reliable but if symptoms are related to ATF temps of 200+ I would suspect a bad one.
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Elder User
Joined: Dec 2003
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From: socal
7.3 PSD, 240K miles. The trans was "rebuilt" by PO at 150k miles but unknown by who or how well but it has worked well up to this point. I don't think the MLPS is it, never had what you described. The deep rumble or viberation is what leads me to the TC or some hard part being damaged. I think it did overheat that day but never puked fluid and the fluid was still bright pink and no noticable burnt smell.
Senior User
Joined: Jun 2012
Posts: 178
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From: S.E. WI
Restriction in the cooler, lines or fittings? Proper TC clutch function depends on cooler flow.
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Elder User
Joined: Dec 2003
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From: socal
That is something I will look at but the cooler is hot to the touch so I assume it is flowing. I may just bail out on this truck and look for something else, tough decision though as it has been a solid workhorse for me.
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From: Lunchtown
7DF250 .. how has it been since then? I just put a used tranny in my 96 F250. I'm likely selling it soon so I didn't want to pay for a rebuild. Your symptoms describe very similar to what happened to me yesterday. My OD light did flash for about 15-20 seconds, but hasn't come back on since then. TC was locking up WAY early (between 5-10MPH). I drove home and let it sit overnight. I drove it today and haven't had any issues yet today.
Fluid is full and not burnt.
Fluid is full and not burnt.
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Elder User
Joined: Dec 2003
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From: socal
Well it has not moved much. I used it a bit and it seemed fine but I still have not taken it in to the shop. I now believe that the TC clutch was slipping. I will update soon as I will bring it it to get looked at by the end of the month.
Senior User
Joined: Jun 2012
Posts: 178
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From: S.E. WI
Muffinman, since you made the comment about LED tail lights, may I relate a recent LED encounter?
It was a '91 E-350 Diesel Ambulance which would set code 74, BOO (brake on/off) switch failure, and it did have LED's. In addition to flashing the OD light, it would only go into tcc lock-up at about 2/3 throttle, any more and it was in passing gear any less would disengage tcc. The brake switch tested fine as did the FIPL setting, but with the key on there was about 5 volts on the red/gn wire coming off the brake switch to the tail lights, speed control module and BOO signal to the TCM. There should be no voltage until the brake pedal is pressed, then 12 volts is present. I guess the TCM would see this mysterious voltage and set the code for a failed BOO switch.
The trouble with LED's is that there is no high resistance ground path as in a bulb filament, by placing an actual bulb between the switched wire and ground, the mysterious 5 volts disappeared and tcc function was restored. Rather than a bulb, we wired in an 8 ohm, 20 watt resister.
It was a '91 E-350 Diesel Ambulance which would set code 74, BOO (brake on/off) switch failure, and it did have LED's. In addition to flashing the OD light, it would only go into tcc lock-up at about 2/3 throttle, any more and it was in passing gear any less would disengage tcc. The brake switch tested fine as did the FIPL setting, but with the key on there was about 5 volts on the red/gn wire coming off the brake switch to the tail lights, speed control module and BOO signal to the TCM. There should be no voltage until the brake pedal is pressed, then 12 volts is present. I guess the TCM would see this mysterious voltage and set the code for a failed BOO switch.
The trouble with LED's is that there is no high resistance ground path as in a bulb filament, by placing an actual bulb between the switched wire and ground, the mysterious 5 volts disappeared and tcc function was restored. Rather than a bulb, we wired in an 8 ohm, 20 watt resister.
Laughing Gas
Joined: Jun 2004
Posts: 1,240
Likes: 3
From: Dallas, Texas
I see this all the time and they bitch cause they don't know why the tranny just buys it. They should have instructions in those damn things telling people "Warning This Can Screw' your transmission up, if not installed correctly. Like leave a damn lamp in the circuit, even if out of sight.
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