{Chrysler 300} Transmission Fluid Leak - Part II (Progress)

[Kurt Brueske <kurt.brueske@xxxxxxxxx>]

Thanks to Club members for their feedback on my transmission fluid leak.  Given feedback, and some cleaning and inspection, I was able to isolate the leak to transmission fluid seeping up into the speedometer cable through the inner speedometer cable gear pinion seal.  Now, I need help determining how to install the seal within the pinion gear bore and want to make sure I don’t install it “upside down.”

Some pictures:

Image_1 - new speedometer cable gear inner pinion seal (Part No. 2124328)

Image_2 - assembly gear removed from the transmission held in place by the retainer clip (removed).

Image_3 - old pinion seal removed from the gear in the orientation it was seated within the bore.  Note, the seal surface is flat but the flip side has a reveal or “u notch” on the reverse side (see Image_4).

Image_4 - same seal as in Image_3 but showing the reveal or “u notch.”

Image_5 - the old seal (top) and new seal (bottom).  I noticed that the inner diameter of the new seal appears to be smaller, and slightly tapered, compared to the old seal.

Image_6 - Fig. 32, pg. 21-48 from my 1962 Factory Service Manual.  As noted in (3), it states “Place the new seal on end of cable with lips toward cable, then slide pinion over seal and cable.”

What I really need clarification on is the procedure recommended in Image_6.  Are the seal “lips” referring to the side of the seal with the reveal or “u notch?”  And does the “lips toward the cable” mean toward the cable that connects up toward the speedometer?

I really appreciate any/all help.  I suspect, based on all the above, that the old seal I removed may have been installed “upside down” and, combined with the larger (worn) inner seal diameter, both of these contributed to the transmission fluid leaking up through the speedometer pinion gear inner seal into the cable (and on to my garage floor).

Thanks!

Kurt

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