Mechanics

E4OD TRANNY

Ford Bronco

Hi, I have a 1994 Ford Bronco (full size) 5.0 auto.
Its got a e4od trans, it seems as if the tranny is enguaging rough and shifting really hard. I started by changing the filter, fliud / gasket. That did nothing. Then I figure electrical. There is a mlp/tr sensor on the tranny that I'm told after time when it gets wet / damp can cause my issue. So, I changed it. It came with a new style harness and I repinned the harness and got the sensor in no prob. That still didnt do it. I found while changing the battery cables that the issue " resets" it self. So no my issue is gone. However if I'm on the high way and need to speed up I hit passing gear (not beating on it, gental) and then the issue returns. For now I try to stay away from Overdrive and if the issue returns I pop the battery cables off and it goes away. None the less the problem is still there. What are your thoughts? OD switch? Sensor on the rear diff? Elect selinoid on tranny?
I cant put much more $$ into this beast right now.
I was told could be the yoke (rear) spline issue, I think not though. What would reseting elect have to do with that. Right?
Please help
Avatar
Jay.tran
April 19, 2007.



The sensor on the rear diff is the RABS valve (Rear Anti-lock Brake Sytem) so I don't think you need that. This sounds more like a modulator issue.

Merlin2021
Apr 19, 2007.
What about selinoid? When I changed the harness it was attached to what I think is the selinoid. Does anyone know how I change it? Is it thru the tranny, does the tranny need to get dropped to change.

Tiny
Jay.tran
Apr 20, 2007.
Well maybe a PCM reflash at ford would do the trick. If pulling the neg cable solves it.

Merlin2021
Apr 20, 2007.
This sounds a lot like the problems I have had with my expedition. The light goes off when detects slippage of the torque converter clutches. I can get it to reset by turning off the key. It is a real problem with the clutches, and mine goes into a high pressure shift mode to prevent more slippage. Does yours shift rough when the light is flashing?

Tiny
Pscott
May 2, 2007.
Yah, I dont have a light though. Older bronco. I'm okay if I reset by disconnecting the battery. Then I'm good. I actually plan to go thru the whole truck. I've done the entire suspension (everything) and I have gone thru the engine, next on the list is the tranny. Once I get to the tranny I plan to post my results.
Thanks
Jay

Tiny
Jay.tran
May 3, 2007.
Also the PCM update is scheduled to be done prior to me getting into the tranny, The earlier posting regarding the PCM update is correct.

Tiny
Jay.tran
May 3, 2007.