clunk during takeoff
04-01-2012, 04:04 PM
#21
So you guys think its a driveshaft/U-joint issue, not something with the rear end?
Just to define it a little more the clunk doesn't happen immediately on takeoff but rather a few feet afterwards but only during acceleration, I'd say within 5ft. I've noticed sometimes there is a second but smaller clunk after the first but only during harder acceleration.
Just to define it a little more the clunk doesn't happen immediately on takeoff but rather a few feet afterwards but only during acceleration, I'd say within 5ft. I've noticed sometimes there is a second but smaller clunk after the first but only during harder acceleration.
04-01-2012, 06:06 PM
#24
Senior Member
One last time, you're talking about a 2 piece shaft, and the OP has the single.
04-02-2012, 10:06 AM
#26
Senior Member
Some 1998-2004 F-150 4X4 vehicles with a one piece drive shaft may exhibit a clunking or grunting noise and/or a shudder sensation from the driveline. The condition will typically occur during light to moderate acceleration from a stop and/or braking. This may be caused by the slip yoke not sliding smoothly on the transfer case output shaft splines.
ACTION: To service, lubricate the slip yoke with Teflon Grease (D2AZ-19590-A). Refer to the following Service Procedure. SERVICE PROCEDURE
Road test the vehicle to verify the condition.
Remove the driveshaft per Section 205-01 of the Workshop Manual.
NOTE: INDEX (MARK) THE DRIVESHAFT YOKE TO AXLE FLANGE FOR REASSEMBLY.
Lubricate the slip yoke with 7-13 grams (0.25-0.46 oz.) of Teflon Grease (D2AZ-19590-A).
Re-index and reinstall the driveshaft per Workshop Manual.
Check the transfer case fluid level and add MERCON Automatic Transmission Fluid XT-2-QDX if necessary.
Road test to verify the condition is corrected.
PART NUMBER PART NAME
D2AZ-19590-A Teflon Grease
OTHER APPLICABLE ARTICLES:
NONE
WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
OPERATION DESCRIPTION TIME
040106A Lubricate The Slip Yoke With Teflon Grease Vehicles With One-Piece Driveshaft (Includes Time To Remove And Install Driveshaft) 1.0 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
4602 42
ACTION: To service, lubricate the slip yoke with Teflon Grease (D2AZ-19590-A). Refer to the following Service Procedure. SERVICE PROCEDURE
Road test the vehicle to verify the condition.
Remove the driveshaft per Section 205-01 of the Workshop Manual.
NOTE: INDEX (MARK) THE DRIVESHAFT YOKE TO AXLE FLANGE FOR REASSEMBLY.
Lubricate the slip yoke with 7-13 grams (0.25-0.46 oz.) of Teflon Grease (D2AZ-19590-A).
Re-index and reinstall the driveshaft per Workshop Manual.
Check the transfer case fluid level and add MERCON Automatic Transmission Fluid XT-2-QDX if necessary.
Road test to verify the condition is corrected.
PART NUMBER PART NAME
D2AZ-19590-A Teflon Grease
OTHER APPLICABLE ARTICLES:
NONE
WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
OPERATION DESCRIPTION TIME
040106A Lubricate The Slip Yoke With Teflon Grease Vehicles With One-Piece Driveshaft (Includes Time To Remove And Install Driveshaft) 1.0 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
4602 42
04-07-2012, 04:45 PM
#30
Got it, got a question too.
When i pulled the driveshaft out of the transfer case fluid started to drain out slowly, is that normal?
I greased it all up and put it back together but I'm thinking the ATF will quickly wash the grease clean out, but the clunk is almost gone, if i wasn't waiting for it i wouldn't notice it.
Also my pinion seal is definitely blown, when i broke the driveshaft loose from the plate about an ounce of gear oil drained out, that was after i pulled the differential cover and drained it. So that's on the list, I'm pretty sure I'll be paying someone to do this, also cut my Ujoints off and replace with normal ones, and rebalance the shaft, i noticed two of the weights were almost completely rusted off.
I noticed the diff cover was pulled before also, the fluid wasn't real dark and there was silicone sealant all over it, all the gears looked extremely good very little wear, i was expecting alot after 150k miles. I was under the impression that there was a magnet in there, but couldn't find any except the one in the fill plug, which is weird.
When i pulled the driveshaft out of the transfer case fluid started to drain out slowly, is that normal?
I greased it all up and put it back together but I'm thinking the ATF will quickly wash the grease clean out, but the clunk is almost gone, if i wasn't waiting for it i wouldn't notice it.
Also my pinion seal is definitely blown, when i broke the driveshaft loose from the plate about an ounce of gear oil drained out, that was after i pulled the differential cover and drained it. So that's on the list, I'm pretty sure I'll be paying someone to do this, also cut my Ujoints off and replace with normal ones, and rebalance the shaft, i noticed two of the weights were almost completely rusted off.
I noticed the diff cover was pulled before also, the fluid wasn't real dark and there was silicone sealant all over it, all the gears looked extremely good very little wear, i was expecting alot after 150k miles. I was under the impression that there was a magnet in there, but couldn't find any except the one in the fill plug, which is weird.