4R100 Slushbox Problem
Thread Starter
|
Posting Guru
Joined: Jul 2007
Posts: 1,433
Likes: 2
From: Spring Lake
4R100 Slushbox Problem
Alright, interesting transmission issue. Nothing is broken to my knowledge... yet, however the shift into 3rd outside tow haul mode while lightly on the gas is VERY mushy. Almost feels like it starts to softly engage, changes its mind and lets go, then shifts in. Overdrive does not do this, only 3rd gear. Tow Haul mode makes it better, however its still there.
Can I get a B&M kit to turn the line pressure up or change any of the accumulators/ shift solenoids to make this better? Is my tranny going out?
Just had the fluid and filter changed about 5,000 miles ago.
Can I get a B&M kit to turn the line pressure up or change any of the accumulators/ shift solenoids to make this better? Is my tranny going out?
Just had the fluid and filter changed about 5,000 miles ago.
Thread Starter
|
Posting Guru
Joined: Jul 2007
Posts: 1,433
Likes: 2
From: Spring Lake
I was told my truck had a 4R100, might be different? But its got itself a tow haul mode... a nifty little button on end of the shifter that says 'Tow/ Haul' and when you push it I believe it says 'O/D OFF' or something like that.
Thread Starter
|
Posting Guru
Joined: Jul 2007
Posts: 1,433
Likes: 2
From: Spring Lake
SP tranny fluid? All I know is it is red and Valvoline put it in lol
But could it have GM atf in it and that messing it up? How do I find out what transmission I actually have.
But could it have GM atf in it and that messing it up? How do I find out what transmission I actually have.
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
You say you had the fluid changed a while back? Do you know what fluid they put in there?? IF you do have the Torque Shift and they did NOT use SP fluid, you have a BIG problem.
Trending Topics
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic 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
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
If you have anything other than Mercon SP fluid in a 5R110W TorqueShift transmission, you had better get it changed immediately.
Thread Starter
|
Posting Guru
Joined: Jul 2007
Posts: 1,433
Likes: 2
From: Spring Lake
The good old wikipedia states that in 2004 only the diesels got the 5 speed automatic. I should have the 4r100 4 speed automatic. I usually pay very close attention to my shifts (severe distrust of automatic transmissions) and have never picked up on a 5th gear in there even if its a lockup converter. However this wierd little 2-3 shift could be a 2-4 jump then a lockup converter?
I don't know though... it drives as if it has 3 speeds and a lock up converter as the 4th. But I'm not an auto trans guy so who knows?
I don't know though... it drives as if it has 3 speeds and a lock up converter as the 4th. But I'm not an auto trans guy so who knows?