Hi. I have a 4th Generation Toyota 4Runner 4WD that has 6 grease fittings on the propeller front and rear (drive) shafts. Some are easy to access as the front shafts can be manually turned when vehicle is parked, as long as the 4WD is disengaged. A few in the rear drive shaft can be tricky to access based on the rotation of the drive shaft. It might be necessary to move the vehicle slightly forward or back a few feet to position the fittings for easy access. Using the Lock N Lube on a high quality grease gun with flexible hose, made an otherwise annoying problem, easy to manage. I had a good quality grease coupler already and know the trick to making it release from the fitting more easily is to unscrew the end of the coupler to release the pressure. The problem, is that typically, this can be difficult to do when access to the end of coupler is limited once it is attached to the fitting, and it is guaranteed to be slippery from grease. The Lock N Lube was easily connected/disconnected using the lever with no effort. Once attached, there was no leaking from the attachment point, and I could easily hear the old grease being pushed out around the u-joints. Once done, a quick push on the lever released the coupler from the fitting and I was on to the next one. $30 is a bit steep for this product, but it works and was engineered so well, it was worth every penny in minimizing frustration. Awesome product in my application......no one wants any extra challenge when lying on the concrete working under the truck, and this thing works like a champ!
