Name That Driveline Problem!!
Thread Starter
|
Lead Driver
Joined: Sep 2006
Posts: 5,665
Likes: 164
From: Cartersville, Ga
Name That Driveline Problem!!
The truck is an 06 250 crew cab shortbed. I have what I would call a clunk in my driveline somewhere. It has been somewhat tiny for the last few thousand miles, but Friday it has become very evident. When you are coming to a stop, as soon as it comes to a complete stop I can feel a clunk. When you go to take off, as soon as you let your foot off the brake it will clunk, and as soon as you put your foot on the gas and take off it will clunk. It doesn't do it under any other driving conditions. There is no whining or howling from the rear end and there is plenty of fluid in it even though i have a weep from the pinion. I have checked all the u-joints and engine and tranny mounts so now I guess the read end internals are to blame. Anyone ever had this happen or have any idea what it could be?
Last edited by UGA33; Jun 7, 2009 at 04:26 PM. Reason: Add info
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Get under there and shake the rear of the driveshaft up and down hard. There were 2 pinion yokes, 1 one was short and got loose on the splines. I would replace the pinion seal and tighten up the yoke first. It won't necessarily howl if your pinion is loose............smokin Obama, what's the US coming to.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,852
Likes: 39
Something I have done before that works pretty well for tracking down mysterious driveline clunks:
Put the truck in park, with the parking brake off. Get under the truck in and put one foot on one of the rear tires. If you push repeatedly, and time it just right, you can really get the truck rocking back and forth hard. Clunks due to driveline slack may become evident.
Put the truck in park, with the parking brake off. Get under the truck in and put one foot on one of the rear tires. If you push repeatedly, and time it just right, you can really get the truck rocking back and forth hard. Clunks due to driveline slack may become evident.
Trending Topics
Thread Starter
|
Lead Driver
Joined: Sep 2006
Posts: 5,665
Likes: 164
From: Cartersville, Ga
Will try anything at this point. If it does turn out to be rear end issues, thankfully, my aunt and uncle own and operate a junk yard with 05-07 SD's coming in all the time. Thanks for the tip
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
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Something I have done before that works pretty well for tracking down mysterious driveline clunks:
Put the truck in park, with the parking brake off. Get under the truck in and put one foot on one of the rear tires. If you push repeatedly, and time it just right, you can really get the truck rocking back and forth hard. Clunks due to driveline slack may become evident.
Put the truck in park, with the parking brake off. Get under the truck in and put one foot on one of the rear tires. If you push repeatedly, and time it just right, you can really get the truck rocking back and forth hard. Clunks due to driveline slack may become evident.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,852
Likes: 39
Thanks for the reps! I should mention that I like to avoid laying directly in a tire path when I do this, in case it slips out of park
You Keep What You Kill
Joined: Dec 2006
Posts: 4,902
Likes: 2
From: Huntersville, NC
Thread Starter
|
Lead Driver
Joined: Sep 2006
Posts: 5,665
Likes: 164
From: Cartersville, Ga
Don't laugh at my artwork using Microsoft Paint, but it gives you an idea of what my problem surely has to be. EXv10 and KelVarnson thanks for your methods of trying to figure this issue out. I went to take the driveshaft and shake it up and down and the thing would not budge. So I laid on my back and pushed the rear tire with my foot and no noises were being made. I watched the back axle and I was literally being able to simulate what a trucks rear end without ladder bars would look like trying to sled pull! The dang rear leaf springs looked like a fat woman's triceps as she is trying to wave down a cab! I had never noticed the bow in them, but I am pretty sure they are the culprit. Below is a world class artist's rendition of the springs.
