Ford experts/Transmission experts/Experts in general(ANYONE) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Lounge For casual talk about things unrelated to General Motors. In other words, off-topic stuff. And anything else that does not fit Section Description.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-31-2007, 04:47 PM   #1
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jan 2005
Posts: 3,295
Thanks: 0
Thanked 0 Times in 0 Posts
MyLittleBlackBird is on a distinguished road
Default Ford experts/Transmission experts/Experts in general(ANYONE)

It is with a heavy heart and a wounded pride that I have come here today. I have a problem and I quite simply can NOT figure it out. I only have two options on this. I will present the options, and then the problem.

#1: Keep plugging and hopefully figure out the problem and fix it.

#2: Tow the car to ohio(some 500 miles?) and have the guy who built the transmission make it work.


Here is the brain buster.

I have a 1995 Ford Thunderbrd LX 4.6L with a 2000+ 4R70W transmission out of a Crown Victoria. This transmission has the 8 tooth output shaft vs. the 7 tooth that my car came with.

The TC is a 2004 Mercury Marauder that has been rebuilt.

It has a modified valve body and different springs(shift kit).

I have repinned the harness to accept the transmission wiring pins and all should be well on that front.
I have rewired the entire EEC(computer), installed a speedcal, tried two output shaft sensors and two vehicle speed sensors.
I have a custom chip burned for the setup I have. The trans/gears/etc.


The issue is that when in D, it will shift 1/2 and 2/3 AND 3/4 all before 20 MPH and then fully apply the TCC.

So with that information given, I am asking... no... begging for someone to shed some light on this situation. I don't like asking for help, and I know this is a GM specific forum. I'm not starting this thread to hear any of the usual B.*. about how I should just get a GM. I just want honest to (insert religious/spiritual figure here) facts.

Thank you.
MyLittleBlackBird is offline   Reply With Quote
Old 01-31-2007, 05:01 PM   #2
Retired Moderator
True Car Nut
 
Pearl_bonnie02's Avatar
 
Join Date: Sep 2006
Location: Northwest Indiana
Posts: 3,047
Thanks: 0
Thanked 0 Times in 0 Posts
Pearl_bonnie02 is on a distinguished road
Default

Could it possibly be a sensor causing it to shift that way? Sounds to me like a possible sensor failure. Or something might be wired wrong? I'm no expert
Pearl_bonnie02 is offline   Reply With Quote
Old 01-31-2007, 05:06 PM   #3
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

How many pulses does the puter want to see... The shaft speed for the RWD should be consideribly higher than out FWD transaxle as the FWD shaft spins at the same speed as the wheels...

The driveshaft will be turning pretty quick, but I'm not so sure that extra tooth on the shaft should make a major diffrence as such... But it seems that you puter is confused....

I haven't dealt a lot with the Ford electronics... I'm on a brick wall with this one..

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 01-31-2007, 05:28 PM   #4
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jan 2005
Posts: 3,295
Thanks: 0
Thanked 0 Times in 0 Posts
MyLittleBlackBird is on a distinguished road
Default

That'* the vehicle speed sensor. The output shaft sensor is on the side of the transmission. It reads the revolutions the transmission internals are spinning(variable on engine rpm and gear). The VSS does NOT have the correct speedo gear on it. I have a speedcal in place to take care of that. However, it may be spinning the speedo too fast at the lower speeds? I don't know. I'll put the correct gear on some day when it warms up here. In the mean time, I'm concerned about getting the thing rolling. Manual first and second work as they should. The O/D cutout switch functions properly and does lock out O/D. The computers(three different ones) have thrown no codes at all.

This damn thing has me lost.
MyLittleBlackBird is offline   Reply With Quote
Old 01-31-2007, 05:37 PM   #5
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Does the Trans use a Trans Module? Or directly off the PCM?

Being that you have it pretty much calibrated to take care of the issues... Is your TPS up to snuff?

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 01-31-2007, 05:55 PM   #6
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jan 2005
Posts: 3,295
Thanks: 0
Thanked 0 Times in 0 Posts
MyLittleBlackBird is on a distinguished road
Default

On my year, everything comes directly from the EEC, with the exception of the spark... That is unimportant at this point though. I'd imagine the TPS is just like the rest of the car.... 183k old, with plenty of exercise from 150k(ish) to present. I'll put my volt meter on the TPS. You may be onto something. I forgot to mention that it WILL NOT downshift at WOT.
MyLittleBlackBird is offline   Reply With Quote
Old 01-31-2007, 06:08 PM   #7
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

From what you were stating I was wondering if by chance the ECC wasn't seeing any load from the TPS... Just a thought... I would figure even one tooth on that ring isn't a far cry from 7... You may have some issues, but the car should still shift for the most part pretty close to what it did before..

Let us know what you fin with the TPS

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
Old 01-31-2007, 08:46 PM   #8
Senior Member
True Car Nut
 
rjolly87's Avatar
 
Join Date: Jun 2003
Location: Las Cruces, NM
Posts: 6,855
Thanked 298 Times in 246 Posts
rjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant future
Default

i tend to agree with the throttle positioning sensor theory. i dont know how the transmission works, so if you all can forgive my ignorance. tempo has the good ole mechanical throttle to tranny linkage. when the linkage is all the way out, the car drives like this. unfortunately, it is spring loaded for all the way open, and keeps coming apart <lucky me >. so i ask, this transmission doesnt by chance use a mechanical linkage or vacuum to determine throttle position does it?
rjolly87 is offline   Reply With Quote
Old 01-31-2007, 09:37 PM   #9
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jan 2005
Posts: 3,295
Thanks: 0
Thanked 0 Times in 0 Posts
MyLittleBlackBird is on a distinguished road
Default

The 4R70W is an electronically controlled transmission. It has no vaccuum lines, and the only mechanical linkage is for the shift lever. TPS sounds like a good cause to me. I will have to investigate when I get unlazy. Plus I don't like the cold....
MyLittleBlackBird is offline   Reply With Quote
Old 01-31-2007, 11:44 PM   #10
BANNED
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
banned3800 is on a distinguished road
Default

Understand how you feel Doug... Its been Cooler here... Seeing Ice freaked me out... Tried to stay in as much as possible... And OMG I have had to run the Heat... Hence my A$$ has become Majorly Lazy

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
banned3800 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
need some general advice here on a ford Darrel Lounge 28 03-26-2007 10:16 PM
Ford Experts, I need your help. wjcollier07 Lounge 25 01-18-2007 12:10 AM
Takes On a Winter Beater (Ford experts) fantastic88 Lounge 28 06-03-2006 12:11 PM
A Ford saved my Bonne from another Ford SSEi95 Lounge 5 12-18-2003 01:40 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:54 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.