C4 Trans going forward in all shift gear detents...inculding neutral

offroadbronco · #1 (**permalink**) 10-31-2009, 07:22 PM

Reverse band broke in my C4, I took it apart enough to get the rear band out and then reassembled. Everything to my knowledge was seated correctly and the front pump seated flush with the case when I reinstalled (which is supposedly a sign that it is all seated correctly). I adjusted the bands to spec and replaced the vacuum modulator and torque converter. These were the only things replaced besides the reverse/low band. Vac modulator was replaced to original (yellow band) as I was running an adjustable before. TC was replaced just because I did not the last time I had the trans rebuilt in 2003....decided to go ahead and R&R.

I got everything assembled, filled up with fluid and no leaks. I start it up and once i finished topping it off, the truck moves forward in every gear...including park! It also seems that I'm missing a shift detent. I have P, R, N, D, 2 but no 1.

I disconnected the shift linkage and tried manually shifting from the trans and have the same issue.

I did not open up the valve body, just unbolted and replaced. When you start it up, it doesn't jump forward (while in park) but when you rev it up it sounds like the motor is under load.

Ideas? I've consulted my Haynes C4 book and an extensive google search and I'm out of ideas.

Ford_Six · #2 (**permalink**) 10-31-2009, 10:21 PM

Sounds like the spool valve isn't connected to the shift linkage.

Mr.N · #3 (**permalink**) 10-31-2009, 11:01 PM

This happened to my Tranny, turned out to be nut # 10 was loose.
-Not saying it's your problem, but dropping the pan should let you know in a hurry.

offroadbronco · #4 (**permalink**) 10-31-2009, 11:11 PM

Quote:

Originally Posted by Ford_Six

Sounds like the spool valve isn't connected to the shift linkage.

Spool valve? The only thing I did when I popped the VB back in was make sure the rolling dentent was making contact with the sprocket connected to the shift lever.

Quote:

Originally Posted by Mr.N

This happened to my Tranny, turned out to be nut # 10 was loose.
-Not saying it's your problem, but dropping the pan should let you know in a hurry.

Now is that the nut that goes on the end of the kickdown lever on the outside? From the picture it seems like it is on the inside.

I really appreciate it guys, this was the first transmission I've even torn down and I really didn't want to admit defeat by taking it to a transmission shop.

I'll drop the pan again in the morning.

Mr.N · #5 (**permalink**) 10-31-2009, 11:14 PM

Found a pic, you can see the nut is not tight. It was stuck in 1st, no matter where the shifter went.

offroadbronco · #6 (**permalink**) 10-31-2009, 11:27 PM

THANK YOU!!!!!

I really hope that is what my problem is.