driveshaft and u joints - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 3 Old 07-17-2007, 04:32 PM Thread Starter
Compression Ignition Addict
onecrazyblackredenck's Avatar
Join Date: Apr 2007
Location: Knoxville TN
Posts: 515
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
driveshaft and u joints

Are you supposed to have play in the driveshaft? I can turn it slightly either way. My rear chunk is leaking alittle where the driveshaft comes out I guess that is the yoke. How hard is it to replace that seal? What are some signs of bad u joints?

03 F250 4wd auto strait pipe quad cab lariat 33x12.50x18

84 K5 blazer CUCV M1008 dana 70 front and rear, detroit lockers front and rear, 45" tractor tires, 6.2 diesel

1978 cj5 built 304 lots and lots of rust
onecrazyblackredenck is offline  
post #2 of 3 Old 07-17-2007, 05:24 PM
duct tape & zip ties

bigcountrysg's Avatar
Join Date: Jul 2006
Location: Willis, MI
Posts: 10,761
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Send a message via Yahoo to bigcountrysg
Signs of bad u-joints, vibration in the driveline, clunking noise in the driveline, severe play in the driveshaft. Yes your driveshaft will have some play in it. That is why you can turn the driveshaft a little right now. That is mainly because of backlash which allows for play between the pinion and ring gears in the diff.

Your leak you have would be the pinion seal. Marc talked about replacing this seal once. I am not clear on what it takes. Besides disconnecting the driveshaft and removing the yoke, and then removing the seal. I know you have to torque the yoke nut back down, don't know the proper torq specs and I am also unsure if there is shimming required when you replace the seal.

If you only have an oily residue on your diff I would not worry to much about that seal unless you have puddles of gear lube underneath the front of the diff.

U-joints I replaced my stock ones back around 75,000 miles. I now have aftermarket greaseable ones in it that have 75,000 and still in good shape.

Lifting a truck can cause premature u-joint failure.

Also your carrier bearing if your truck has one aka driveshaft support bearing will go bad as well. This will cause a vibration and squeek and shimmy when it goes bad. The only way to replace it is to remove the driveshaft and have the old bearing pressed off and the new one pressed on.

Your Actions Today, Decide Your Future Tomorrow

2005 6.0 Crew Cab Long Box Lariat, current truck

2004 6.0 destroyed by contaminated fuel

2002 7.3L burnt
bigcountrysg is offline  
post #3 of 3 Old 07-18-2007, 12:22 PM
dragr8cer's Avatar
Join Date: Apr 2006
Location: Kentucky
Posts: 88
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
If you only replace the seal, you should just be able to place the shims back where they came from and they will be correct.

TS 6-position chip, wicked wheel, 6637 mod, Warn hubs, Sonnax valve and Tricumulator springs, straight pipe, ion wheels, High pressure Oil crossover, ATI tripple disk torque converter, John Wood valvebody.
dragr8cer is offline  

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome