Clunk when accelerating from stop
Thread Starter
|
Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
Clunk when accelerating from stop
2011 F150, 6.2, 4x4, 29k miles. When accelerating from a stop I get a "clunk" noise in the drive train. I had this same issue/feeling with my F250 and greased the slip joint in the drive shaft. It fixed the issue.
Only problem is, my F150 is a one piece driveshaft. Any ideas?
Only problem is, my F150 is a one piece driveshaft. Any ideas?
Laughing Gas
Joined: Dec 2010
Posts: 1,200
Likes: 45
From: Timbuk3, MI
VIBRATION/THUMP/CLUNK NOISE ...TSB 13-3-13 ««« -click-
-click- the pic'
Goth 150
< This space intentionally -blank- >
Thread Starter
|
Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
Thanks for the link but I have a one piece drive shaft. Just crawled under it to confirm.
However, when I was under it I noticed transmission fluid leaking out of the front. Most likely the front seal. The first 3 days I had the truck the LS clutch packs had to be replaced as well. Starting to think I bought a lemon. So I am probably going to take it back to the dealer and see what they can find, which is another 3 hour one way drive...
However, when I was under it I noticed transmission fluid leaking out of the front. Most likely the front seal. The first 3 days I had the truck the LS clutch packs had to be replaced as well. Starting to think I bought a lemon. So I am probably going to take it back to the dealer and see what they can find, which is another 3 hour one way drive...
Moderator
Joined: Jul 2011
Posts: 6,513
Likes: 669
From: Sioux Falls Area
10-4
but if the splined connection between the transfer case and driveshaft (aka slip joint) gets dry it will exhibit the same symptoms as the TSB describes.
that is to say: just because ford hasn't issued a TSB for it, does not mean that the condition does not exist.
i'd grease the output shaft and see if that fixes ya up.
but if the splined connection between the transfer case and driveshaft (aka slip joint) gets dry it will exhibit the same symptoms as the TSB describes.
that is to say: just because ford hasn't issued a TSB for it, does not mean that the condition does not exist.
i'd grease the output shaft and see if that fixes ya up.
Thread Starter
|
Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
I was thinking that could be it as well. I'll try and pull it apart tomorrow and see what happens. Is the transfer case a sealed unit or is fluid going to pour out of it when I pull the slip joint out?
Trending Topics
Moderator
Joined: Jul 2011
Posts: 6,513
Likes: 669
From: Sioux Falls Area
that, my friend, is a very good question.
I would think it is sealed, but i don't know for sure 100%.
methinks that the outer seal is just to keep dirt out, but not to keep fluid in. there should be an inner seal for the fluid.
maybe someone who as dropped thier driveshaft can confirm?
I would think it is sealed, but i don't know for sure 100%.
methinks that the outer seal is just to keep dirt out, but not to keep fluid in. there should be an inner seal for the fluid.
maybe someone who as dropped thier driveshaft can confirm?
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
Elder User
Joined: Jun 2012
Posts: 528
Likes: 3
From: Rochester,NY
Clunk in Drive Train
This is what i think, Most Fords have Backlash in the Rear Differential Case when you come to a stop, not all the time, when you take your foot off of the brake and accelerate you will sometimes get a clunk this is this Backlash that you feel in the drivetrain,I also have a one piece drive shaft
Thread Starter
|
Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
I'm going to drive it back to the dealer this weekend and let them try and figure it out. The clunk is more than just normal backlash due to the one piece driveshaft. My work truck is the same set up but with the 5.0. It hasn't and doesn't clunk at all.
Official Ford Rep
Joined: Oct 2010
Posts: 3,123
Likes: 6
Crystal
Thread Starter
|
Cargo Master
Joined: Nov 2003
Posts: 2,000
Likes: 39
From: North Dakota
After 2 1/2 weeks I finally have my new truck back. They had to pull the transmission and replace the front seal. Also, they greased the slip joint and no more clunk. Tonight I will crawl under it to get a better look at the transmission. So far all seems to be operating correctly.
Official Ford Rep
Joined: Oct 2010
Posts: 3,123
Likes: 6
Great news, kameronth! I'm glad to hear that your truck is back at home. If I can be of any assistance in the future, just let me know.
Crystal
Crystal
Thread
Thread Starter
Forum
Replies
Last Post
Amicus
1999 - 2003 7.3L Power Stroke Diesel
28
Sep 23, 2018 08:02 PM
UP77F250
1973 - 1979 F-100 & Larger F-Series Trucks
20
Apr 9, 2013 11:46 AM