code 628, excessive converter clutch slippage....?????????
Thread Starter
|
Senior User
Joined: Nov 2004
Posts: 234
Likes: 0
From: Mount Tremper, New York
code 628, excessive converter clutch slippage....?????????
ok, so the other day im on my way home from work, and i noticed that torque converter felt like it wasnt locked up fully. btw its a 1991 302/E4OD. when i would push on the gas a little, the rpms go up before itll start to accelerate, and when downshifting out of overdrive coming down hills it was not holding me back like it used to.
i got home and i checked the fluid, it was ok, so i pulled the codes, got the normal three i always get, and i got 628, Excessive Converter Clutch Slippage.
anyone else ever get this code? and or symptoms? am i facing catastrophic meltdown? or just some small problem i can fix in my driveway?
all input is appreciated......
i got home and i checked the fluid, it was ok, so i pulled the codes, got the normal three i always get, and i got 628, Excessive Converter Clutch Slippage.
anyone else ever get this code? and or symptoms? am i facing catastrophic meltdown? or just some small problem i can fix in my driveway?
all input is appreciated......
Tuned
Joined: Sep 2005
Posts: 250
Likes: 11
like you may be facing the same thing I am. A trashed torque converter. My Bronco is on hold right now though, so I can't tell you for sure, but mine is doing the same thing, but I haven't pulled any codes. I was talking to a family memeber who happens to be a mechanic and he commented on how low quality a torque converter ford put on there trucks, especially with the E4OD.
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
If its not dead yet it will be. Bimmerboy and I are suffering similar difficulties right now. The T/C in my 93 just did the same thing. I let it go a little longer and ended up chasing what I thought was a bad MLPS but realized that all the screwy things that the E4OD was doing had been adversly affecting the information from the MLPS and the VSS.
Thread Starter
|
Senior User
Joined: Nov 2004
Posts: 234
Likes: 0
From: Mount Tremper, New York
but what was wrong with your tranny? what would make mine slip? i read on the bauman engineering site about a part in the clutch that wears out, clutch piston, get cracks in it and lets fluid get by. anyone know where this part is located or if it is replaceable?
Tuned
Joined: Sep 2005
Posts: 250
Likes: 11
From what I understand toque converters are welded together. There is no replacing parts in them, better off to get a rebuilt one. My transmission slips in and out of gear. But it's not the transmission, the torque converter just stops working. It is your problem only accentuated.
Elder User
Joined: Feb 2005
Posts: 693
Likes: 0
From: Hoboken, NJ...
IIRC the correct test procedure from Ford to check the TC is to get the truck up to 55 or 60 MPH, and hold it there on flat level ground....now without taking your foot off the gass press lightly on the brake.......look at the tach and the engine RPM should momentarily rise up and then come back down. If it does this it indicates that the TC is good still.
Thread Starter
|
Senior User
Joined: Nov 2004
Posts: 234
Likes: 0
From: Mount Tremper, New York
see, i dont need to do that, cuz it does that when i push the skinny pedal even just the littlest bit. it acts like it is cold constantly, you know how you turn those high rpms on cold start/drive, but wont stay locked. so i know the problem, now what is causing the problem?
Trending Topics
Senior User
Joined: Oct 2011
Posts: 196
Likes: 0
From: Milwaukee, Wi
See I got the same code but I'm not having any of those symptoms yet, or at least they're not noticeable yet. I thought I heard that bad torque converters make a really ugly sound though so idk whats going on
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
The E4OD will behave like its losing a TC when the hydraulic pump begins to fail too. Loss of pressure CAUSES the converter to slip so its no unreasonable to assume that this Code will rear its ugly head at some point. When the pump does go (and I say "when" not "if") it belches its guts straight forward into the fins of the converter taking it out as well.
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
Unfortunately no. Its not an electronic component and low hydraulic pressure can/will trigger a myriad of Codes depending upon which internal component(s) is(are) affected. Frequently, a failing pump is accompanied by a handful of "600" series Codes that have no rhyme or reason behind them OTHER than the fact that all "600" Codes are E4OD-related.
Freshman User
Joined: Feb 2016
Posts: 32
Likes: 1
ok, so the other day im on my way home from work, and i noticed that torque converter felt like it wasnt locked up fully. btw its a 1991 302/E4OD. when i would push on the gas a little, the rpms go up before itll start to accelerate, and when downshifting out of overdrive coming down hills it was not holding me back like it used to.
i got home and i checked the fluid, it was ok, so i pulled the codes, got the normal three i always get, and i got 628, Excessive Converter Clutch Slippage.
anyone else ever get this code? and or symptoms? am i facing catastrophic meltdown? or just some small problem i can fix in my driveway?
all input is appreciated......
i got home and i checked the fluid, it was ok, so i pulled the codes, got the normal three i always get, and i got 628, Excessive Converter Clutch Slippage.
anyone else ever get this code? and or symptoms? am i facing catastrophic meltdown? or just some small problem i can fix in my driveway?
all input is appreciated......
New User
Joined: Jul 2016
Posts: 7
Likes: 0
628 help me! Don't even know how to use this site
I'm having the same issue on my 94 f150 my ONLY code is 628, I'm currently having the TC replaced. I have very light shifts when driving, slams into reverse and drive, is there anything else that may be cause this code and symptoms or will replacing my TC fix my issue?
New User
Joined: Jan 2021
Posts: 1
Likes: 0
@1994 F150flareside: What was the culprit of your 628 code? How did you fix it ultimately? I also have a ‘94 F159 with an E4OD and I really can’t believe it’s the TC failing. I gotta believe it’s just a sensor but....
Last edited by Cappel77; Jun 3, 2021 at 01:44 AM. Reason: More questions