Transmission Help
Thread Starter
|
Senior User
Joined: Feb 2015
Posts: 264
Likes: 0
From: Northcentral Missouri
Transmission Help
I have a 1986 F-350 with 4 speed. The truck has dual wheels, 460, and a dump bed. Today, I heard a "thunk" and the truck refuses to move! It shifts into all gears, but does not move. The drive shaft is not turning, either. Everything else sounds good/normal. I as GUESSING, but I THINK it is the output shaft. I am wondering what transmission I have - as there are no tags, and the door post tags are unreadable or gone. Any one have any idea what I have, or what would be the best option on another transmission?
Super Moderator
Joined: Apr 2004
Posts: 34,499
Likes: 2,811
Any strange sounds when you let the clutch out with it in gear?
You could have a BW T19. Less likely a BW T18 or NP435.
If you have a synchro first gear and two PTO ports, you have a T19.
Discussions of these transmissions here:
https://www.novak-adapt.com/knowledg...anual/t18-t19/
As to what's wrong, unless you can see the issue, you will have to pull the trans to check input/output and clutch issues.
The transmission will have numbers cast into the case and identification can be made from those numbers in most cases.
You could have a BW T19. Less likely a BW T18 or NP435.
If you have a synchro first gear and two PTO ports, you have a T19.
Discussions of these transmissions here:
https://www.novak-adapt.com/knowledg...anual/t18-t19/
As to what's wrong, unless you can see the issue, you will have to pull the trans to check input/output and clutch issues.
The transmission will have numbers cast into the case and identification can be made from those numbers in most cases.
Thread Starter
|
Senior User
Joined: Feb 2015
Posts: 264
Likes: 0
From: Northcentral Missouri
No strange sounds, everything SOUNDS and FEELS normal....Also, what is the wire that attaches to the top/rear of the trans (NOT the speedo cable...)? I noticed it was unhooked for some reason....
Super Moderator
Joined: Apr 2004
Posts: 34,499
Likes: 2,811
Wires are either for back up lights or as explained in that link:
"The last years of the T18 featured a direct-drive (4th gear) switch to signal a lean or cruise mode operation to the Engine Control Module (ECM)."
"The last years of the T18 featured a direct-drive (4th gear) switch to signal a lean or cruise mode operation to the Engine Control Module (ECM)."
Lead Driver
Joined: Nov 2013
Posts: 7,174
Likes: 1,174
If the problem isn't with the transfer case, the transmission's 1-2 shift fork may have broken. The shifter action may still feel somewhat normal, perhaps a bit lighter, but that's because the 1-2 shift rail is still locking in the detents.
To test this theory, try starting out in 3rd gear. You don't actually have to get the truck going, just see if the engine bogs down and the driveshaft tries to turn.
If the 1-2 shift fork has broken, this is a relatively easy repair. You only have to remove the shift tower, not the entire transmission. The cab floor should have an access panel on the transmission hump.
Lead Driver
Joined: Nov 2013
Posts: 7,174
Likes: 1,174
Not very likely. On the ultra rare chance you managed to break the output shaft, it would have made a horrendous grinding noise as the two broken halves rubbed against each other with the engine running.
Thread Starter
|
Senior User
Joined: Feb 2015
Posts: 264
Likes: 0
From: Northcentral Missouri
It is a 2WD....The thing DOES seem to shift easier.....I will try and go tomorrow and see what I can see....Hope it is an "easy" fix...
I'm also pretty sure this is a T19 - the PTO mount is on the driver's side (not sure if it has one on both sides - will look tomorrow).
I'm also pretty sure this is a T19 - the PTO mount is on the driver's side (not sure if it has one on both sides - will look tomorrow).
Trending Topics
Thread Starter
|
Senior User
Joined: Feb 2015
Posts: 264
Likes: 0
From: Northcentral Missouri
f
Welllll….just got back from pulling things apart - everything was in good condition...EXCEPT....when we unhooked the front U-joint, the yoke pulled out of the tailpiece. Yup - tailshaft broke off cleaner than clean!
Question - can that shaft be replaced without tearing into the transmission itself? How hard of a job is it? I have a broken down USMC vet, with a bad back, bum shoulder, fake knees, and deaf in one ear (me), and an Amish mechanic.....
Question - can that shaft be replaced without tearing into the transmission itself? How hard of a job is it? I have a broken down USMC vet, with a bad back, bum shoulder, fake knees, and deaf in one ear (me), and an Amish mechanic.....
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
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
Lead Driver
Joined: Nov 2013
Posts: 7,174
Likes: 1,174
Does the rear driveshaft have a slip joint, or it rigid end to end? What you've described sounds more like a slip joint at the transmission.
Thread Starter
|
Senior User
Joined: Feb 2015
Posts: 264
Likes: 0
From: Northcentral Missouri
I will get a photo, but I am POSITIVE the shaft is broken! The nut is still attached to broken shaft in the yoke, and the yoke is sitting on the dining room table, being stared at by my wife......
Moderator
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
Here's two used transmissions in Missouri.
1984
Transmission Assembly
Ford Truck F350
6.9LV8 4SPD M/T166,230A170061$CallBayless Auto Parts USA-MO(Springfield) Request_Quote 1-800-397-9108
1983
Transmission Assembly
Ford Truck F250NO FWH-142K M.T., 4 speed, Warner, T-19 (6.9L & 7.5L), 4x2-142K142,000AA52$400John Meyer Truck and Foreign Salvage, Inc. USA-MO(Joplin) Request_Quote 1-800-662-7963
1984
Transmission Assembly
Ford Truck F350
6.9LV8 4SPD M/T166,230A170061$CallBayless Auto Parts USA-MO(Springfield) Request_Quote 1-800-397-9108 1983
Transmission Assembly
Ford Truck F250NO FWH-142K M.T., 4 speed, Warner, T-19 (6.9L & 7.5L), 4x2-142K142,000AA52$400John Meyer Truck and Foreign Salvage, Inc. USA-MO(Joplin) Request_Quote 1-800-662-7963
Thread Starter
|
Senior User
Joined: Feb 2015
Posts: 264
Likes: 0
From: Northcentral Missouri
[QUOTE=Franklin2;18761611]Here's two used transmissions in Missouri.
Thanks! Looks like I will need to go that route.....Not something I wanted to do in the 100 degree sunshine!
Thanks! Looks like I will need to go that route.....Not something I wanted to do in the 100 degree sunshine!
