A4LD/4R44E Ford 4.0L Crank Spacer Puzzle

在4.0升福特上，导致前部区域泄漏的关键细节是前密封类型、钟形壳衬套定位、发动机到变速器定位和变矩器轮毂跳动。除此之外，曲轴隔套、变矩器导向器和飞轮/挠性板需要特别注意。福特已经对飞轮和变矩器试点进行了更新，如果你不小心，很容易无意中安装这些部件的早期版本。bob游戏怎么下载

Figure 1shows the crankshaft spacer. This part lives between the engine crankshaft and the flexplate. It is very common to find this part cracked, broken or worn where the torque converter pilot fits into the center of the spacer. When the spacer is worn or broken, the converter can move out of alignment. It doesn’t help that the spacer is made of a brittle powdered-metal material that wears and cracks easily. It should be routine to inspect or replace this part on every vehicle.

福特also changed the pilot on the torque converter.Figures 3&4show the early and late converter pilots. The newer pilot is longer and has a smaller chamfer on the end.

Figures 5&6show the short and long pilots assembled with crankshaft, spacer and flexplate. The longer pilot has .100 inches more contact area in the spacer than the earlier short version. Unfortunately, not all converter rebuilders update to the longerpilot, so it is common for transmission shops to replace long pilot converters with the earlier short pilot version, unknowingly taking a step backward. Whenever possible, your replacement torque converter should have the longer pilot.

Hopefully, this piece of the puzzle, taken together with the front seal-type bell housing bushing alignment, engine-to-transmission alignment and converter hub run-out, will make the whole picture easier to see and prevent costly comebacks with this troublesome area of A4LD/4R44E units.