Suddenly hard shifting
Thread Starter
|
New User
Joined: Apr 2015
Posts: 11
Likes: 0
Suddenly hard shifting
Hey y'all here's my first post. I have a box stock 2000 F250 with a 7.3l 255k miles. Last weekend I changed the oil and filter. The air filter, fuel filter, and changed out the serpentine belt since it was looking a bit raggedy.
For some unknown reason the trans now shifts quite hard from first to second but only if I drive easy. If I get on it it shifts just like it should.
I can't imagine anything I did to the truck could cause this. I have not yet looked to see if perhaps I knocked off a vacuum line but don't know if even that would cause the trans to shift hard.
Any help is greatly appreciated.
For some unknown reason the trans now shifts quite hard from first to second but only if I drive easy. If I get on it it shifts just like it should.
I can't imagine anything I did to the truck could cause this. I have not yet looked to see if perhaps I knocked off a vacuum line but don't know if even that would cause the trans to shift hard.
Any help is greatly appreciated.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,741
Likes: 2,669
From: SE Florida
A vacuum line? On a diesel? What would it do? There is no vacuum in a diesel engine.
The first thing to do is get the codes read. The places that read codes free cannot read transmission codes.
The first thing to do is get the codes read. The places that read codes free cannot read transmission codes.
Thread Starter
|
New User
Joined: Apr 2015
Posts: 11
Likes: 0
Thank you Mark for pointing that out. I guess my point was I will have to look to see if I managed to knock "something" off while changing belts, filters and oil. What does signal the trans to shift that I might have accidentally knocked out of position while doing my maintenance? I am 99% sure the two connected since it wasn't days or hours but immediately after when the hard shifting started. Once again, anything constructive will be greatly appreciated.
Cargo Master
Joined: Oct 2010
Posts: 2,089
Likes: 16
U may check connection on ebp sensor directly above water pump. Connects to steel tube.
It has nothing to do with the transmission whatsoever. However, when i bought my truck, it would always shift hard when driving easy. Folks here kept talking about cleaning that sensor and tube so I checked it and it was stopped up. Cleaned tube and to replace sensor.
The hard shifting went away after that. I do not know why and would not think it would matter but it did.
It has nothing to do with the transmission whatsoever. However, when i bought my truck, it would always shift hard when driving easy. Folks here kept talking about cleaning that sensor and tube so I checked it and it was stopped up. Cleaned tube and to replace sensor.
The hard shifting went away after that. I do not know why and would not think it would matter but it did.
Thread Starter
|
New User
Joined: Apr 2015
Posts: 11
Likes: 0
Bad choice of words on my part. I will get the codes checked as soon as I can. I was looking for something I might have accidentally knocked off while doing the maintenance. I had a look but unfortunately I'm afraid it's not going to be something that simple. So far it's not real bad but I know it's not right so it needs to be fixed. M
Thread Starter
|
New User
Joined: Apr 2015
Posts: 11
Likes: 0
No power train codes stored in memory. I rechecked the fluid level and it is up to the "H" but not higher. Doesn't smell burnt or show any discoloration. I've put 46000 on it since buying and have not done a filter or fluid change so I guess that is my next purchase. We will see what changes if anything.
Trending Topics
Thread Starter
|
New User
Joined: Apr 2015
Posts: 11
Likes: 0
This was sitting in the bottom of the trans pan when they removed it for fluid and filter. There was about half a teaspoon of grey material like a fine paste in the bottom of the pan. With 46000 since last service that's about what I would expect. No shavings or lumps so that's good.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / Worst Features Of The 2025+ Ford Expedition
Brett Foote
10 Ways Ford is LOSING to the Competition
Joe Kucinski
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
Thread Starter
|
New User
Joined: Apr 2015
Posts: 11
Likes: 0
Ok Mark. I had the fluid and filter changed. There are no codes being shown. Other than the tube of weather seal laying in the bottom of the pan there wasn't much else to see. There was a small amount of oily feeling grey paste in the bottom of the pan. Maybe about a half teaspoon or slightly more. There wasn't anything I could feel so it would be like a super fine (2500) lapping compound or maybe an anti seize compound. So far the trans seems to shift smoothly if I accelerate moderately away from a stop. If I ease up on 2000rpm the trans seem to shift harder. If you have any input I would greatly appreciate it. M.
Senior User
Joined: Nov 2013
Posts: 307
Likes: 2
Just throwing out an idea but the OSS sits on the top rear of the trans. It is $40 and you could just be wasting money, but it is very easy to change out, takes 5 minutes. Maybe you can return it if it doesnt do anything...
Thread Starter
|
New User
Joined: Apr 2015
Posts: 11
Likes: 0
I paid extra attention to the OD light both in the on and off position and saw no flashing at all.
Of course I spent ten minutes looking for a clunk in my dash today before spotting the two frozen bottles of water I had put in the dash tray. Sometimes I wonder where my brain goes. M.
Of course I spent ten minutes looking for a clunk in my dash today before spotting the two frozen bottles of water I had put in the dash tray. Sometimes I wonder where my brain goes. M.