Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

transmission codes ???

Thread Tools
 
Search this Thread
 
Old Oct 13, 2004 | 05:47 AM
  #16  
Morky's Avatar
Morky
Thread Starter
|
Junior User
25 Year Member
Joined: Apr 2000
Posts: 74
Likes: 0
update:
will be getting a torque converter,and filter, new fluid of course .will be changing in a few days, my self
will post after install........
 
Reply
Old Oct 14, 2004 | 08:02 AM
  #17  
fefarms's Avatar
fefarms
Elder User
Joined: Sep 2004
Posts: 941
Likes: 4
If you do a yahoo search using the keywords "E4OD hard shift" you will find a couple of forums (including this one), in which others recount issues with hard shifting e4OD transmissions.

They report that there is a Ford TSB that states that the transmission goes into a "performance mode" if there are any detected fault codes. The performance mode includes increased line pressure and firm, sometimes neck-snapping shifts, especially from first to second. It isn't clear from the reports whether the fault has to be continuous or a one-time thing.

There are two common sources of "fault codes" that provoke this behavior. One is the manual lever position switch, which is a bank of resistors on the side of the trans that sense the position of the gear lever. As originally designed by Ford, this had a tendency to allow water infiltration, and Ford has a "retrofit kit". There is the obvious fault of the PCM thinking the lever is in some position other than it actually is (like neutral when you want "drive"), and also failure of "sanity checks" performed at various times. This problem has been mentioned as one of the things that causes "performance mode" aka hard shifts.

The other issue is with the RABS sensor. This creates a wheel speed signal which is used for the anti-lock brakes, and is converted to a VSS signal by the module that drives the vehicle odometer. The VSS is used by the PCM to determine, amoung other things, whether there is "excess torque converter slip".

You see where this is going. If there are any issues with the RABS or VSS, the PCM may flag a code 628, and then decide to put the trans into performance mode, which you then experience as "hard shifts". The code 628 in such a case is not real, merely a symptom of a faulty vehicle speed input to the computer. But the computer tries to "protect" the trans by switching to performance mode.

If you've changed the torque converter, let us hope it cured the problem. If it doesn't, you might look into getting the TSB on this issue and investigating the TSS signal.
 
Reply
Old Oct 14, 2004 | 08:19 AM
  #18  
Morky's Avatar
Morky
Thread Starter
|
Junior User
25 Year Member
Joined: Apr 2000
Posts: 74
Likes: 0
I can't disagree with all the information out there, but would like to believe that the transmission place a reputal one has guided me in the proper direction.
Which I choose by checking with three service garages.
They all stated the transmission place I went to .
weeding out the useless ones in our area.
My most main concern is that it slams so hard when placing in reverse, from any place, neutral,or park. It seems like the rearend is going to take a beating, and sooner or later something has to give.

Only time will tell.
I have also noticed that the self test codes seem to differ from the codes read by a scanner.
Which does have me puzzled as to why they would be different.
Thanks again for all the research you have been doing on this problem.
 
Reply
Old Oct 27, 2004 | 11:29 AM
  #19  
Morky's Avatar
Morky
Thread Starter
|
Junior User
25 Year Member
Joined: Apr 2000
Posts: 74
Likes: 0
Thumbs up

well its been 1 week
about 300 miles and the shifting is fine
so the torque converter, did the trick ,,,,,,,,,
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Steve Ginn
1983 - 2012 Ranger & B-Series
2
Aug 18, 2013 11:18 AM
rbryant936
Clutch, Transmission, Differential, Axle & Transfer Case
2
Sep 23, 2003 04:52 PM




All times are GMT -5. The time now is 04:10 AM.

story-0
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-1
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-2
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-3
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-4
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-5
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-6
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-7
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-8
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-9
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE