I have an automatic 2000 f150 5.4 and I've been hearing that anoying clunk when starting to move after a stop. I checked my u-joints and they seem ok, so I decided to get some teflon grease from ford and lube up my slip yolk (I put alot on). The clunk happens less now, but it still happens enough to drive me crazy. Is there anything else it could be?? If I replaced the slip yolk could that help?

 

check into the clutch pack scenario in the rear end. there were
a bunch of different threads and posts on this subject and is exactly what was wrong with mine. It's being replaced Tuesday.

' 04 f-150 xlt 4x4
reg. cab flareside
drk toreador red

 

Yup , mine too but the dealer says its transmission 3-2 down shift clunk.........yeah right i told them not downshift but noise happens from start to about 10 mph they still wont claim its any problem and fomoco is no help all they did was call dealer and they said its normal......but they had reapired it before and it lasted about 8-10 thousand miles

 

On slow take offs there is also a clunk from the rear of my 97 f150. I tried the teflon grease trick too which helped alittle, but it's still there, and still really annoying. I even had the drive shaft replaced by ford and both u-joints. Still clunks. I heard from a friend u can shim something to make it stop. If anyone has any ideas, that would be great

 

yes that is correct as long as there is not to much wear on the gears you can shim them back to "spec" ....right now I am in process of getting these morons at the dealer to re-shim mine....they have done it before and now claim its the transmission ...what would I know I have only driven it since new with 100 miles on it ( ha ha)

 

I'm having the same problem with my '02 F150. I've taken it to two different dealerships multiple times with no problems being found. I can't get anyone at Ford (the dealership or customer relations) to even acknowledge that a problem exists. It's extremely frustrating!!!!

Any additional information as to potential fixes for this problem would be greatly appreciated.

yesman85

 

Does anyone know what gears are supposed to be shimmed?

 

I also had the same problem until I had my transmission fluid changed. Not only did it stop the clunk, it shifted a lot smoother. Ford recommends changing the fluid every 30,000 miles. It's a quick job, the lube place just hooks a machine in the transmission cooler lines, starts the engine, lets it idle. It pumps the old fluid in one side and suck the new fluid in from the other. Took about 15 minutes and $90.00. Well worth the time and money.

Larry

 

I believe it is the spider gears ....they are probably pushing this off on fixing it because they are the harder ones to get to....so its easier for them to say its normal....of course no other vehicle I have owned ever has done this

 

I have had this same problen since new. I took the truck back to dealer and was told the slip yolk needed to be greased. It worked.....for a little while. I returned to the dealer and the slip yolk was replaced.....worked for even longer this time....but back it came. I have regreased the sukker every few months since then and I guess thats what I will have to live with since "FORD" doesn't seem to recognize the problem as being a warranty issue

 

Clunk is usually caused by loading of the driveshaft. Even though the yolks may appear to be OK, when they tend to get hot, they can bind. Pull the shaft out and replace the bearings, or repack them using white lithium grease that can be purchased at NAPA.

 

Roush is pretty much right. I have had this problem with a different truck and everything looked ok. I finally just checked alignment of everything and the driveshaft angle was off. Once I got the angle right the problem went away and has been gone for bout 100k on that truck.

 

Check the fit of the slip yoke in the extension housing bushing to be sure it slides in and out smoothly. Apply teflon grease to the inside and outside of the slip yoke. Also you can try to reindex the slip yoke on the spline of the output shaft. The only gears in the rear end that have any real effect on the driveline as far as clunking would be ring and pinion backlash but it would have to be way out to feel it as a clunk. The spider gears only have a small shim behind them to prevent wear to the diff. case.

 

I have an 2002 F-150 XLT 5.4, 4X4 and it clunks only once when you first move forward in two wheel drive and you turn the wheel sharp right, seems like something binding and lets loose maybe from the front I'm guessing.

It may occur in 4 wheel drive but I seldom use it except at cell sites where crushed rock causes me to bog down in a 40 foot stretch.

 

How did you get the alignment right?