I have yet to figure out why my tranny is acting the way it is. I purchased this 96 bronco used, and when i got it (ebay, dealer lied, i wont get into it), i found the tranny sucks. It doesnt like to upshift, or downshift up a hill. It also feels like there is something holding back internally (I can slow down, going down a hill. GO FIGURE!) Also, when sitting at a traffic light, with brake to the floor, the truck tries to move forward in surges. Also, when I am just driving down the road with minimal pressure on gas pedal, the truck seems to lurch ever so slightly, almost like a miss. Any ideas? I just bought a high flow y pipe and catback, so if I can isolate a problem, instead of having to get a new tranny, my wallet would appreciate it. TIA

Rich

 

i got a 90 5.8 on my third E4OD.i heard you gotta change fluid like every 30k if you want it to last. check out www.transmissioncenter.net , its a good site.

 

Is there some sort of solenoid or actuator that allows a tranny to shift up into the next gear. Also, is there one to go into overdrive? Thats the new trick my tranny likes to show me.

 

Just bought my 86 Bronco and doesn't upshift. A few advised me to check the TV (throttle valve) cable if truck slips between gears.

 

The E4OD does have a solenoid pack inside the transmission. These solenoids regulate line pressure, and perform the shifting functions for the transmission. If the PCM detects one of these solenoids bad, it will set a fault code. Go to Autozone and have the codes pulled for free, and you may see some tranny codes. Replacing the solenoid pack isn't difficult, but you have to drain the fluid and drop the pan. It could also be the throttle posision sensor or the Vehicle Speed Sensor.

 

Ok, guys found this out last weekend. IF your E4OD equipped truck has a brakelight burned out, the change in voltage due to a lamp missing from the circuit will quite often confuse the tranny (or the computer really). The application of the brakes sends a signal to the computer telling it to let the tranny "coast" not related to your cruise control but a parameter for the transmission itself. If I hadn't witnessed this "fix" myself I would have been really skeptical as to its plausibility. But I saw the slipping and surging in a 96 F-350 completely vanish when a burned out brakelamp was replaced. I know, sounds crazy and screwy but again, I witnessed this and stood there with my jaw on my shoes when it actually worked.

 

I was told by the guy who inspected my truck that the previous owner messed with one? of the o2 sensors in my truck, and it wasnt long enough, so someone had cut and spliced tubing inbetween. Is this even possible? Ive never seen the o2 sensor, nor the tube hes referring to. Could this possibly be in line with what greystreak92 is saying about currents? He said that it has a current running through it, and I do have a nasty ticking coming over my radio.

 

02 sensor will affect engine performance before it will mess with the tranny I would think. Not having it connected would be a contributing factor in any computer-related problem though.

 

The E4OD tranny uses all of the computer sensors to tell it what to do. The early ones have faulty MPLS(manual position lever sensor) sensors. There is a kit from Ford to update it. There is not TV cable it is all computer controlled. Check your TPS(throtle position sensor) I had one go bad and played heck with my tranny.

 

This can be caused by the wrong tranny fluid being in there, have the tranny serviced & flushed, should fix the problem.

If that doesn't fix it, it needed it anyhow. The E4OD needs frequent flushing.

I had the same problem you have and I had the computer error codes read, it was the throttle position sensor, which is located on the bottom of the throttle body. I replaced it, wholah - fixed!

Also, there are ALOT of tranny problems caused by a dirty mass air sensor, so if you have this type of system, instead of the speed density system, take the mass air sensor out of the air inlet tubing and spray it down good with carb cleaner untill the filiment is shiny silver again. This has fixed the same problem you are having in our van, thunderbird and f-150! It's a common problem.


Good Luck!

 

e40d is no good for wheelin found that out the hard way had to have it rebuilt 6 months ago and now its acting exactly like yours

 

Hi, since you said that the bronco surges forward at a stop light, that indicates torque converter. The tranny on;y moves forward when power is being applied to it, that's the torque conv. job

Also that stuff about the brake light bulb, is a bunch of garbage. The truck doesn't know if the light is out it sends power to the light connection regardless of the light bulb, also it senses the brake pedal by th elittle silinoid in the brake pedal housing, not by the light bulb. HOPE THIS HELPS!!!

 

Does the torque convertor do anything else? Could it be responsible for the surging I feel when I have the throttle lightly applied, and it feels like the same surging, only I'm moving (like stated in previous posts) When my tranny eventually decides to shift, my right foot feels like it is pushing a lincoln town car with a 4 banger, but when i get into the gas a bit, it perks right up(not just due to more gas, it literally feels like some sort of obstacle has been moved..best way I can describe it). Could all my problems be torque convertor related? I have a feeling the previous owner had some hard towing miles on my truck. Thanks for all your answers fellas.

Rich


'the bronco surges forward at a stop light, that indicates torque converter. The tranny on;y moves forward when power is being applied to it, that's the torque conv. job'

 

'If the PCM detects one of these solenoids bad, it will set a fault code. Go to Autozone and have the codes pulled for free, and you may see some tranny codes.'


Would these codes have been visible to the inspection station?? When I got this inspected, my check engine light was on (small vacuum leak), and the attendant had to get the hookup to plug into my port to see why the light was on. It passed, but I am assuming that all codes are reported to the central computer, and should have been shown at the same time that he checked. Yes? No? Maybe?

Rich

 

Yes, the codes would have shown up. The PCM controls the engine and transmission both. When the service station pulled the codes, they would have gotten any tranny codes as well.