It looks like I need to replace the o-ring and seal (805 and 806 in the drawing) on the speedometer gear in the ZF. The o-ring looks easy to replace but it's not clear to me how to replace the seal. Has anyone done this?
I am aware that prior to removing the unit from the ZF, vise grips must be attached to the flat tab at the end of the gear to prevent from it sliding down into the ZF upon removal of the retention bolt (804 in the drawing).
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Steve, I've done this a bunch of times; however, it has been a while. I believe you are on the right path. It should pull out using the vice grip. Replace the o-ring and I suspect that you are good to go.
JT
Thanks John.
I have the speedometer gear out of a ZF and it is two pieces. There is the actual gear along with a housing that has both oil seals (o-ring in addition to the shaft seal). The o-ring replacement is straight forward. The shaft seal looks it must be driven down with a socket. The new seal would then be driven back in with some tubing correctly sized so that it only presses on the metal housing of the new seal.
How does this sound to you all?
Looking good!
did you make a mark on the top of the housing so you can easily clock it for the bolt?
It is self aligning for the most part. The sleeve, shaft, ZF housing, and bolt need to be lined up and the bolt just goes into its threads in the ZF.
I checked with Wilkinson and he said the o-ring tends to fail and the seal is usually okay. I am going to try just the o-ring. If it still leaks I will replace the seal next time. This is an easy area to work on. Just do not drop the speedometer shaft into the transaxle, put vise grips on the flat tab.
