Trans expert needed!

Reply Subscribe

Thread Tools

Search this Thread

Mar 6, 2009 | 10:51 AM

bubbasz1

Thread Starter

Cargo Master

Joined: Dec 2003

Posts: 2,022

Likes: 4

From: Redford, Mi.

Trans expert needed!

My sons 2001 V10 4X4 4r100 died. Turns out it had a mechanical diode that bit the dust. The trans was rebuilt with E4od replacement parts for the diode, a rebuild kit and a new center support, new pump, and a rebuilt converter.
With installation complete we had reverse, and 1'st, would not shift. We figured that maybe some junk had gotten into the solenoid pack so we replaced that. No reverse but shifted through the gears fine the first time, never got to fast enough to hit 4th. Through a P0782 2-3 shift error, reverse stated working. Cleared the codes no reverse. Checked pressures with a gauge all pressures are good even reverse but it doesn't work. When you put it in reverse it loses engine RPM (just a little) but it will not back up. After screwing around with this pig for a few hours and consulting the book the only thing we could think of was maybe the pump that was installed was a non pwm pump so we ripped it back out and the trans buddy tore it all back down. Everything is just like it was when it went together, no bad gaskets, pump is the same casting all orifices are the same.
Any thoughts? Maybe incorrect shift solenoid although the trans shop only list's the one we have.

Mar 6, 2009 | 11:54 AM

99f350sd

Lead Driver

Joined: May 2003

Posts: 9,303

Likes: 48

From: Lyndonville, Vermont

Did you flush the cooler? Maybe some crap floating around when you started it. Any crap in the bottom of the pan?

Dick

Mar 6, 2009 | 12:14 PM

juneau76

Cargo Master

Joined: Sep 2007

Posts: 3,049

Likes: 1

This sounds like a job for Mark Kovalsky. He was a Ford tranny guy for years. I'm sure he'll pick up the thread when he's online again.

Mar 6, 2009 | 12:19 PM

bubbasz1

Thread Starter

Cargo Master

Joined: Dec 2003

Posts: 2,022

Likes: 4

From: Redford, Mi.

Everything flushed with cooler flush plus added a inline trans filter by the radiator on the return line.

Mar 6, 2009 | 07:32 PM

bubbasz1

Thread Starter

Cargo Master

Joined: Dec 2003

Posts: 2,022

Likes: 4

From: Redford, Mi.

bump to the top

Mar 6, 2009 | 09:33 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,696

Likes: 2,617

From: SE Florida

I can just guess without looking at the parts, and I guess that there is something wrong with the reverse clutch seals. They may not have been installed right and are leaking. When a code is stored the failure mode is to raise the line pressure, which can make bad seals work, giving you reverse. Clearing the codes will lower the pressure again, so no reverse.