I've had the clunk since day one... never took it to the dealer because I knew they wouldnt find it. Sometimes it doesn't clunk at all. My question is this, how do you grease the slip yoke? Hopefully this will fix the problem. Pictures would be great too.

Thanks

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2000 F150 Flareside Super Cab Lariat
Black w/Grey Leather
15% Tint
5.4L Triton V8 3.55LS
4x4 ORP
Jet Chip
Borla Exhaust
K&N Air Filter
ARE Z Series
Penda Liner Pro
PIAA 9007 Platinum Super Whites
PIAA 980 Dual Lamp
PIAA 520 4x4
Billet Grill
Pioneer DEH-P920R CD Head Unit
Pioneer CDX-P1270 Changer
Pioneer GM-X742 Sub Amp
Pioneer GM-X944 4ch Amp
Pioneer TS-C603 6 1/2" Components
Pioneer TS-E1690 6 1/2" 3 ways
JL Audio 10" Stealth Box
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Blue Interior Neon
Illuminated Ford Emblems
NR Automotive White Face Gauges
Ventvisors
Bugflector II
Zenetti 18" Vega wheels
TOYO Proxes S/T 285/60/18

 

I too had the same clunk. I dropped drive-shaft and added some lithium grease inside the spline and bingo all gone now. The spline goes into the tranny. Undo four bolts to drop drive-shaft, but make sure you mark driveshaft so u put it back where it was before. Spray the bolt's the day before.

 

I have a 97 f-150 Off Road 4X4 with a clunk that's driving me nuts. I have an appointment next week to replace springs and bushings, but I bet it's the spline!!

Dealership mech. told me it was the broken leaf spring clamps that were causing it. I put my own clamps around both springs and nothing changed.

They rebuilt my tranny with 2000 miles left on my 75000 mile extended warranty and it's made this clunk sound since.