Review on 🔧 High-Quality Ford Fluid XG-8-A PTFE Lubricant - 1 lb.: Genuine Performance for Optimal Maintenance by Mark Ponnusamy

UPDATE - Ford has released a new grease for this driveshaft knock/knock problem. This is a white Teflon lubricant. Ford Part Number 9L3Z4W602A Find it on E-Bay (without the quotes) "9L3Z4W602A - KIT - DRIVE SHAFT CASE REPAIR" EDSDAYCO's best price was not only the lowest price but also free shipping. The eBay page is here: http://www.ebay.com/itm/9L3Z4W602A-KIT-DRIVE-SHAFT-BOOT-REPAIR-/171718556742?pt=Motors_Car_Truck_Parts_Accessories&hash=item27fb393c46&vxp=mtr Great stuff! It really works! Stops rattling when starting or stopping. It was an older Teflon based blue/green grease and it still works great! Really hope this helps - Mechanic Suggest you watch this YouTube video which explains the problem and shows how to fix it. https://www.youtube. com/watch?v=79Qo-806n9g This mechanic proved to be very helpful in solving Ford problems. Simple, easy, like step by step, with references and part numbers. Important note: Ford ended up using a white, high Teflon grease for this TSB, the previous grease was blue and green. But both colors/types of lube had Teflon on them. Ford has a new TSB to replace the driveshaft if it's under warranty. Lubricate yourself if there is no guarantee. Takes about 45 minutes and is easy to make. Newly built drive shafts have a thicker nickel plating on the drive shaft splines and the reservoir of the transmission output shaft. maybe when the warranty has expired because it actually works. Typically, after about 30,000 miles, your driveshaft will need to be checked and re-greased if you are using old driveshafts. Hope that helps.