Shift shaft VS Manual shaft SEAL?

Mopewbie · Jun 30, 2025

Hi all, I need a quick help/guidance here.

My 727 is leaking badly from the seal. I thought it was the shift shaft seal and was about to order one when I notice this "manual shaft seal" option? (as picture)
What's the difference? Are they the same, or completely different ones?

And do I need any other seal to be replaced, since I'm taking up this job? Thank you.

Mopar Hunter · Jun 30, 2025

My friends 727 took the 8609 seal.

Mopewbie · Jun 30, 2025

Thanks Mopar Hunter.

And before someone points it out, if choosing the same item under a different car (70 Coronet 318) it shows the same items under the "shift shaft seal", but this time including the 727. (Which doesn't show in the image in the first post)

Vaanth · Jun 30, 2025

Mopewbie said:
Hi all, I need a quick help/guidance here.

My 727 is leaking badly from the seal. I thought it was the shift shaft seal and was about to order one when I notice this "manual shaft seal" option? (as picture)
What's the difference? Are they the same, or completely different ones?

And do I need any other seal to be replaced, since I'm taking up this job? Thank you.

View attachment 1877195

Both of the RockAuto line item listings of "Manual Shaft Seal" and "Shift Shaft Seal" refer to the same part, apparently due to different terminology differences by the different manufacturers. Chrysler calls it the "Manual Valve Shaft Seal".

The original Chrysler part number is 2466842, superseded by 3878447 and 4505098. The seal was used in both A904 and A727 applications from 1966 into the 1990s.

RockAuto and other online application listings can be useful, but also can often be incomplete, misleading, or at times, incorrect depending on the transfer and interpretation of the manufacturer data.

If I was buying, my preference is the ATP brand for transmission items, but any of the listed seals under both designations should be good.

R/T Boy 67 · Jun 30, 2025

There is another, much smaller seal that is used on the throttle shaft, which comes up the middle of the manual shift shaft.

Mopewbie · Jun 30, 2025

Vaanth said:
Both of the RockAuto line item listings of "Manual Shaft Seal" and "Shift Shaft Seal" refer to the same part, apparently due to different terminology differences by the different manufacturers. Chrysler calls it the "Manual Valve Shaft Seal".

The original Chrysler part number is 2466842, superseded by 3878447 and 4505098. The seal was used in both A904 and A727 applications from 1966 into the 1990s.

RockAuto and other online application listings can be useful, but also can often be incomplete, misleading, or at times, incorrect depending on the transfer and interpretation of the manufacturer data.

If I was buying, my preference is the ATP brand for transmission items, but any of the listed seals under both designations should be good.

Thank you, that helps a lot!

R/T Boy 67 said:
There is another, much smaller seal that is used on the throttle shaft, which comes up the middle of the manual shift shaft.

Couldn't find that in the RockAuto website.

R/T Boy 67 · Jun 30, 2025

This

ruffcut · Jun 30, 2025

I would replace both inner and outer seals at the same time.

1967coronet · Jun 30, 2025

R/T boy 67 shows the seals you will need.
And yes change both.

Mopewbie · Jun 30, 2025

R/T Boy 67 said:
This

Thanks for that.
Shame I can't get it from RockAuto, I'll see if I can find it somewhere else, at least now I know what I'm looking for.

69Bee · Jun 30, 2025

Sometimes you need to use the "Rock Auto Translator" from BabbelFish!!

Shift shaft VS Manual shaft SEAL?

Mopewbie

Well-Known Member

Mopar Hunter

FBBO Gold Member

Mopewbie

Well-Known Member

Vaanth

Well-Known Member

R/T Boy 67

FBBO Gold Member

Mopewbie

Well-Known Member

R/T Boy 67

FBBO Gold Member

ruffcut

FBBO Gold Member

1967coronet

FBBO Gold Member

Mopewbie

Well-Known Member

69Bee

FBBO Gold Member

Similar threads