First off, I know I'm starting a new thread on this. My other thread has pretty much died. I'm not really getting the help I expected to on these forums. I know people on here aren't transmission gurus, but I just have a pretty simple question about my tranny. Nothing to fancy. So a little insight on my problem would be very appreciated.
Anyways my truck threw a C.E.L and it was P1740 my TCC solenoid.
I have a 2001 F150 5.4L with the 4R70w transmission.
I ordered a new TCC solenoid for 20 bucks after I found out Ford wanted 50 for it.
You won't have to take the valve body off, just the bolt and pull the solenoid off. Make sure the O-ring is on the stem of the new solenoid.
Replacing the wiring harness is a good idea too. Yours is a 2001 so it should be a solid plastic piece that runs from the main plug into the tranny to all the solenoids inside instead of wires. Not sure how much it is but you might as well change it while your in there.
Also, some people will tell you that replacing the filter isn't necessary, and although they're probably right as they only really get contaminated when things fail in the tranny, they're cheap and I would say why not.
Yes, the TCC solenoid is the round one just above the pink paint. The two square ones that are together are the shift solenoids.
As for the wiring harness it will be a hard plastic wiring harness. Basically, one end will go through a hole to the outside of the transmission to connect to the truck wiring harness. The other end will be inside of the tranny, and it goes over the solenoids and snaps onto them. I don't think theres a bolt holding it in just a couple snaps but there might be a bolt I don't remember. Should be pretty straight forward to remove once you take a look at it.
I have bought my tranny parts from this site before. Here's a direct link to the internal wiring harnesses for the 4R70W:
It should be any of the ones that say hard wire; the soft ones are for the pre-99 trannies. Also, I think if I remember correctly, any of the ones on that site that the part numbers start with a "U" are used parts. So go for the top one on that list I think. Its number: 76446E
Edit: It should look like this one:
Last edited by scruffy; 12-30-2010 at 01:30 AM.
Reason: Adding Picture
So I just wanna get a run down before I start the project.
1. Unbolt the tranny pan and drain fluid.
2. Pull filter out.
3. Valve body will be exposed without having to take it out.
4. Unscrew TCC solenoid and screw new one in.
5. Unsnap/Unscrew old wiring harness to/from TCC solenoid and replace.
6. Replace filter.
7. Bolt tranny pan back on
And you said its all straight forward so there shouldn't be any surprises?
Yes, that's essentially the process except for one thing. The harness also connects to the TCC solenoid. So you'll have to unsnap it from all the solenoids first, replace the TCC solenoid, and then install the new harness.
And yes, that's where the harness connects, but also if you look closely there is another square connector on the TCC solenoid and there will be a third pressure regulating solenoid that isn't shown in that picture that it unsnaps from. The harness goes completely across the valve body, connecting to all three solenoids and then out through a hole in the top of the tranny on the passenger side.
Also, I'm not sure how replacing the fuel filter is related lol... (nvm, post removed, I guess the guy was spamming...)
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