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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 9, 2014, 12:11 PM
Post #26 of 33
(2048 views)
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Re: AX4N shifting issues
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Killer - not lost, Just I don't have access to details that Gary has come up with pin by pin what to expect when testing that precisely at all. Transmissions are totally taught in the trade schools but not always done at all shops or even dealerships.
Techs should and shops should know the chances of what to expect and go from there either thru a trans specialty shop by agreement all depending.
I certainly would get another code reading as you mentioned if only to verify the same results or the chance of more info found.
The two of you are zooming in fantastically on a fix and this thread makes a great read if nothing else. It's great to see progress and fixes here like anything objective one is to succeed. Go for it. You are in good hands,
Tom
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gsferraro
Veteran
Nov 9, 2014, 12:15 PM
Post #27 of 33
(2042 views)
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Re: AX4N shifting issues
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Anytime i have to remove a side cover my r&r guys always had to loosen and lower the frame enough to get the side cover off. You may have to pop out the ball joint also. keep the engine supported. My guys put a screw jack under the engine oil pan.(car is on the lift ofcourse). Please let me know how you do. Gary
(This post was edited by gsferraro on Nov 9, 2014, 12:16 PM)
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Discretesignals
Ultimate Carjunky
/ Moderator
Nov 9, 2014, 12:21 PM
Post #28 of 33
(2035 views)
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Re: AX4N shifting issues
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Ya, and don't be like this guy...
https://www.youtube.com/watch?v=RCAfJXugsBk
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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killermrob83
User
Nov 9, 2014, 1:11 PM
Post #29 of 33
(2028 views)
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Re: AX4N shifting issues
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Would it be wise to change all three of the shift solenoids since they are identical and relatively inexpensive?
Any recommendations as to what manufacturer to go with for replacements?
Any part numbers for the solenoids?
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gsferraro
Veteran
Nov 9, 2014, 1:19 PM
Post #30 of 33
(2025 views)
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Re: AX4N shifting issues
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I would go with ford OE, cant go wrong with those.
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gsferraro
Veteran
Nov 9, 2014, 4:40 PM
Post #31 of 33
(2015 views)
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Re: AX4N shifting issues
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Real quick tip on how these solenoids work. They are powered up by the fused wire and grounded or turned "on" by the computer, so solenoid A is off in 1st and 2nd and on in 3rd and 4th. What this means to the computer is, when the solenoid is "off" the computer needs to see 12 volts, and when the solenoid is "on" the computer needs to see zero volts. If it sees anything other than that it sets a code P0750. Gary
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killermrob83
User
Nov 19, 2014, 4:09 PM
Post #32 of 33
(1997 views)
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Re: AX4N shifting issues
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OK, so the job of removing the valve body cover with the trans in place is a bit tricky, but it can be done. The hardest part was in removing the isolator because of clearance issues. I wound up completely removing the driver side rear main cross member bolt and then just backing off on the passenger side bolt about an inch. Once that was done, I used a pry bar at the rear driver side attachment point to gain the necessary clearance (for some reason I wasn't able to break free the front driver side main cross member bolt, and was afraid of breaking it, but backing it out would have helped the clearance issue tremendously for the removal of the isolator). The engine sub frame took a little finagling to remove, but it can also be done.
Upon removal, it was obvious that the A solenoid had an issue because the melamine cover that shrouds the exposed coil windings had been distorted and the cover was lying in the bottom of the pan........... about 1/3 of the coil was badly burned and chunks of the insulator at that end of the windings were also found in the pan and on top of the B solenoid's coil shroud. I'm amazed that it even functioned at all.
The A and B solenoids are located in very close proximity to one another, within about an inch and a half or so. The shroud cover over the B coil was also somewhat darker and I wasn't sure if it had received excessive heat from A's failure or if it was starting to exhibit signs of failure, so I replaced it also even though the coil's resistance was within spec. This has been a city car all of it's life so it's easy to see why the A and B coils would bear the majority of the work load.
The C solenoids shroud looked normal, and due to availability of 3 new solenoids within my allotted time to complete the task (a cold front blew in with frigid temps and rain turning to snow as I'm working in the driveway under a makeshift tarp), I opted to leave that one in place. Once back together, the trans now shifts like a champ.
Can't say how grateful I am for all of the excellent input as to how to tackle this job. I got the trans-in-place r/r procedure from another forum and would like to make reference to that for someone else's benefit, but am not sure if that is against site policy. If anyone is interested in pics of the 2 solenoids removed, I can post those at a later date.
Once again, thank you so much! Rob
(This post was edited by killermrob83 on Nov 19, 2014, 4:13 PM)
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gsferraro
Veteran
Nov 19, 2014, 5:24 PM
Post #33 of 33
(1987 views)
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Re: AX4N shifting issues
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Rob,
Glad to hear that the car is fixed. I know its no easy task getting that side cover off, theres not much wiggle room. Great job
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