Could overfilling transmission do this?
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Cross-Country
Joined: Feb 2004
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Could overfilling transmission do this?
When warmed up, shift into reverse and engine dies. Give it some fuel prior to shifting and it takes off backwards like the torque converter is locked. Shifts from 1st to 2nd and 2nd to 3rd are harsh. After cooling down (overnight), everything is fine 'til it's warmed up again. Transmission fluid is only 3,000 miles old - I pumped out all 18 or so quarts and replaced it. Now it's black and stinky - burnt smell. I think it was about 1 qt overfilled (it's so hard to tell with the dipstick). Transmission is a E4OD. Truck is a 96 F250 powerstroke. Thanks for your help
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Joined: Oct 2003
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From: Baltimore
Overfilling does not cause damage. A overfilled transmission will normally push excessive fluid out of the transmission vent. It sounds like your transmission was overheated. Do you have any mods done to the truck?
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Joined: Jan 2005
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From: West Texas
I know when I just recently changed my oil and filter in my E4OD which I drain the torque convertor at this time also, I only was able to drain out 14 quarts. At any rate if you put a 2WD filter on a 4WD truck this can make the motor load up and die if you put the wrong filter in them, really does screw them up. I was told this at the Ford House I use and I figure they would know. Now I don't know if you put the 4WD filter in a 2WD tranny though. Might want to make sure if you changed the filter that you was sold the right one for your truck...
Would be interested to know if you have done any mods to the tranny and how long they have been done? Motor too???
Would be interested to know if you have done any mods to the tranny and how long they have been done? Motor too???
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Cross-Country
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I replaced all the fluid by using a techniquelearned from a tech article on this site. You disconnect the rear pipe, run a hose from it to an empty container and then run the engine, pouring new fluid in the filler as the old is pumped out. It never ran empty. To my knowledge the truck is stock. I did remove the pan to drain what was in it before beginning the pumping operation but did not replace the filter. I refilled the pan prior to pumping.
I wondered if, like with engines, overfilling can cause foaming and inadequate lubrication.
I wondered if, like with engines, overfilling can cause foaming and inadequate lubrication.
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From: Baltimore
What was the condition of the fluid before you changed it and how many miles are on the truck?
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Cross-Country
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Don't remember what the fluid looked like before I changed it. I've always had stick-shift vehicles so wouldn't know good fluid from bad. The truck has about 130,000 miles on it. I bought it at auction, it had been rolled. Had the body fixed. Currently, the forward shifting seems OK warm or cold. The reverse is fine when cold but when warm, it kills the engine when shifted into reverse or if I give it some fuel first, it takes off like a shot and bogs down the engine when I brake. Feels like torque converter is locked or close to it. The fluid level is now correct. I'm wondering if I should flush it out with new again.
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Posting Guru
Joined: Oct 2003
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From: Baltimore
I don't think another flush would change anything. It sounds like the transmission has internal damage and is going to need a rebuild. The fluid shouldn't have discolored in such a short amount of time. If a rebuild is done, make sure they flush the transmission oil cooler. If you tow or plow snow, you might want to consider some modifications while it's apart.
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Cross-Country
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Jeez what a bummer. I'm pretty sure my lines are clear because I disconnected the back pipe to the transmission and idled the engine to pump a quart out. It came out at a good clip. Wonder why that clog only affected reverse.
Think I'll take it to a shop for an analysis. Hope they don't BS me.
Think I'll take it to a shop for an analysis. Hope they don't BS me.
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Joined: May 2004
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From: Vancouver
Sounds like the torque converter is locking up to me. Mine lost the front seal last summer and it was stalling until I got it filled back up to proper level. I agree that it would probably just force the oil out of the vent if it was over filled.
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Cross-Country
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Long story short: Torque converter was toast. Metal gringings in the transmission pan. Had to get a rebuild with lots of new parts including a super duty torque converter and fluid pump. Total: $3900.00. Vowed in the sixties I'd never own another American vehicle. Shoulda listened.
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The 4x2 pan is too shallow for the 4x4 filter - the 4x4 pan is a little deeper and requires a longer pickup.
Wow! $3900? If my trans dies and I get an estimate that high, I'll be looking for a nice 6speed stick to put in it. I can't imagine that the conversion would cost more than that - and the trans would then last the life of the truck. But that is just me, I really don't like automatics. I'm kind of surprised that I actually bought one... First one I've owned in over 30 years.
In fact, I'm so paranoid about automatic transmissions that I put a Trucool trans cooler, an external spin-on filter (with bypass), a deep, finned aluminum pan, and a Factory tech valve body. If those mods don't extend the life of the auto trans, I certainly won't bother fixing it!!
Wow! $3900? If my trans dies and I get an estimate that high, I'll be looking for a nice 6speed stick to put in it. I can't imagine that the conversion would cost more than that - and the trans would then last the life of the truck. But that is just me, I really don't like automatics. I'm kind of surprised that I actually bought one... First one I've owned in over 30 years.
In fact, I'm so paranoid about automatic transmissions that I put a Trucool trans cooler, an external spin-on filter (with bypass), a deep, finned aluminum pan, and a Factory tech valve body. If those mods don't extend the life of the auto trans, I certainly won't bother fixing it!!