Blown transmission?
Thread Starter
|
5th Gear
Joined: Jan 2025
Posts: 5
Likes: 1
Blown transmission?
I was getting on the freeway the other day (96 f350 7.3 crew cab dually) and it made a loud thunk and started vibrating really bad, until I was under 10 mph, I tried to accelerate but the vibration was really bad although it was shifting gears smoothly, I stayed on the shoulder at about 30mph. Got to a hill and gave it just a little more throttle and boom another loud thunk and now every gear selector position is neutral. I’m thinking transmission. Or rear end? When it’s running and I take it out of park (also neutral in my case) and put it back in park it grinds.
Any advice would be greatly appreciated!
Any advice would be greatly appreciated!
Lead Driver
Joined: May 2009
Posts: 6,807
Likes: 704
From: Tobyhanma, PA
I would start with the easy stuff. Is the driveshaft still on and working? You can jack up the rear and with the trans in nuetral, try to spin the driveshaft by hand. Should be easy to figure out if the diff is damaged.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,725
Likes: 2,651
From: SE Florida
That indicates that it is NOT the transmission, but something downstream. If it's a 4x4 it could be the transfer case. It could be a u-joint or the differential, too.
Thread Starter
|
5th Gear
Joined: Jan 2025
Posts: 5
Likes: 1
it is 2wd so no transfer case
Thread Starter
|
5th Gear
Joined: Jan 2025
Posts: 5
Likes: 1
I did a Quick Look on the side of the freeway when it broke but I’ll definitely get deeper into it tomorrow morning
Butt-Head
Joined: Apr 2004
Posts: 9,448
Likes: 2,934
From: Reed Point, MT
EDIT:
How did the initial replies not show up when I first replied? Oh well you have your answer.
Thread Starter
|
5th Gear
Joined: Jan 2025
Posts: 5
Likes: 1
That means something aft of the transmission is broken. Being a dually, it's 2wd (or came from the factory that way). I bet the driveshaft turns and the wheels don't. Use a friend/wife/father in law to watch or sit in the driver seat to verify.
EDIT:
How did the initial replies not show up when I first replied? Oh well you have your answer.
EDIT:
How did the initial replies not show up when I first replied? Oh well you have your answer.
I’ll update after I jack the rear end up and check tomorrow
Trending Topics
Thread Starter
|
5th Gear
Joined: Jan 2025
Posts: 5
Likes: 1
I jacked up the rear end and put it in drive and crawled under, the u-joint at the back of the transmission was snapped, it broke the cast strap on the drive shaft as well, looks like it’s time for a new drive shaft!
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
Thread
Thread Starter
Forum
Replies
Last Post
Mikelikesit
2017 - 2022 Super Duty
14
May 26, 2022 08:56 PM
dmcfarden
2017 - 2022 Super Duty
10
Oct 4, 2017 05:43 PM