shudder while i turn

[CentralOregon]

Originally Posted by CHAD5.0

The shutter you are getting is likely clutch chatter from the limited slip rearend. The only true fix is to replace the clutches in the rearend. I beleive there is a TSB on this problem. I had the same problem with my 02. Ford recommends soaking the new clutches in their additive before installation. I followed their procedure and have had no problem since.

Out of everything I have read through this is where/what everything logical leads to (the rear lsd) I would be very interested in getting ahold of that TSB and get'r done. I may take it over to my mechanic and see what he would charge me to do it? If anyone knows where I can get that TSB I would appreaciate any help in finding it.

Thanks

[dbkerley]

Originally Posted by CentralOregon

And this got worse when the rig was warmed up, and worse yet when under load and turning?

Yes - I don't drive the rig unless it is warmed up and the problem only occurred when turning right on one particular entrance ramp that is banked backwards on my daily run.

A very slight shudder would start in the front and because of the banking it would amplify through the truck until it caused the LSD to join in. After two days, I got where I didn't even want to take that turn.

[rhinoron]

Originally Posted by CHAD5.0

The shutter you are getting is likely clutch chatter from the limited slip rearend. The only true fix is to replace the clutches in the rearend. I beleive there is a TSB on this problem. I had the same problem with my 02. Ford recommends soaking the new clutches in their additive before installation. I followed their procedure and have had no problem since.

AhHH Thank you so much. I was begining to wonder if I was explaining it correctly with all the guys posting about thier front end problems,and me sitting here scratching my head thinking, Well Ill keep it to myself.

[Ron Mitchell]

What you guys are saying about the LSD seems to make sense. My '02 F-250 7.3 Just started doing it a couple weeks ago. Here's my question: how critical do you guys think it is to get it corrected? I plan on fixing it, but as this truck is my daily driver, can I wait a few weeks before doing any permanent damage?

[CentralOregon]

Originally Posted by Ron Mitchell

What you guys are saying about the LSD seems to make sense. My '02 F-250 7.3 Just started doing it a couple weeks ago. Here's my question: how critical do you guys think it is to get it corrected? I plan on fixing it, but as this truck is my daily driver, can I wait a few weeks before doing any permanent damage?

Hi Ron,

All I did was add some Friction addative into the rear differential. Parked'r sidways on a hill/slope with the fill bolt on the uphill side, took the bolt out and added the 4oz of slip lock in and even thought it still does it from time to time........it is very minimal........(continued to decrease in frequency over about the first 200miles after I put the addative in). I think I will change the fluid all together soon and put in some good synthetic in and see if that gets rid of it all together(I only notice it like once a week now and that may be just because I am atuned to it now and actualy look for it and notice it even when it justbarley does it?)...........but I would try the friction addative as it is cheap and easy then go from there.....everything else gets more expensive real quick. (Other things I found while doing my reasearch (torque converter on the way out, U-joints going bad, recent lift caused axel to get our of balance, lsd clutch pack disks & loose steering linkage[just so you don't have to spend days combing through things])

B

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Last edited by CentralOregon : 06-05-2008 at 06:42 PM.

[xldme]

bump... having the same problem added 4oz of slip and still doing it?

[CentralOregon]

Originally Posted by xldme

bump... having the same problem added 4oz of slip and still doing it?

Mine did not stop all at once, over a month or more it decreased as I continued to drive it.....not sure why, and I still notice it from time to time, but not very often and not to the extent it escalate to before.

Not sure, but I also replaced the main trans valve body(several months later) with a BTS custom unit and a transgo plate(comes with the BTS unit) and that seemd to help also(shifts a whole lot nicer too).

I read a lot of differnet fixes for similar issues on this one, just glad the simple & cheap one was what worked for me.

[billman]

My 02 Ex has had the same problem. The chatter becomes more pronounced after driving a while. Additive did not help much. I will try to change fluid.... getting a suction tube in there is futile so i will open the cover and take a look inside while I'm there. Still waiting on a gasket though. Fingers are crossed on just needing a fluid change with a little addtive.

[billman]

Well, I opened the cover and changed out the fluid. I put additive in and still notice the problem after the truck is real warm with highway driving. The grabbing is not as bad since the fluid change which leads me to believe the LSD Clutches may be warn a little.

My question is this: If I can live with the shudder, am I doing damage to anything else? The previous owner had the same problem and drove it for over 50 thousand miles.

[adfields]

Originally Posted by billman

Well, I opened the cover and changed out the fluid. I put additive in and still notice the problem after the truck is real warm with highway driving. The grabbing is not as bad since the fluid change which leads me to believe the LSD Clutches may be warn a little.

My question is this: If I can live with the shudder, am I doing damage to anything else? The previous owner had the same problem and drove it for over 50 thousand miles.

So long as the clutches don't chunk off into the oil, then get into the bearings and gears you will be fine. The odds of them doing that in a third member are low under normal highway driving.

Like I said in the start of this post the drive shaft slip yoke is the number one culprit for the rear end "shudder under load" and "shudder under turn at speed." Lube it often guys, that blue coating Ford uses sucks when it's dry.