I have the A500/42rh (904 w/ overdrive) on my 90 vert. It's started leaking around the speedometer sprocket in the tail of the transmission. I have not been able to find an o-ring/seal kit specifically for the A500 or 42rh. I see them for 908 and 727's, but I'm guessing with the overdrive assembly it's a different size? Can anyone point me to a source for these? My google searches have come up empty for A500/42rh sepecific seals.

Thanks

 

Actually - the same adapter was used, so the same seals were used.

The seals come as a set from Mopar - # 4057046 ( figure 21A-3700 in the parts list from the FAQ here).

With that info, you can find it many places; one such is at https://www.moparpartsoverstock.com/...chTerm=4057046 ; eBay has it for a bit more - https://www.ebay.com/itm/NOS-MOPAR-4...-/293375719795 .

Be sure to check with your local CDJR dealer, also.

RwP

 

Thanks Ralph. Unfortunately the Mopar link doesn't have the part...if you click the button in the link, it takes you to a different page with a replacement part of $80, but out of stock.

The ebay link I'll check into, but prior, I contacted these people and this is the part they said is correct

https://www.ebay.com/sch/i.html?_nkw...id=m5467.l1311

It looks visually the same as mine, so for $7 I'll give it a try.

 

Is the output sensor that is leaking? Or the speed sensor housing that has a cable?

 

On a 1990? It's not a sensor that's leaking, it's a mechanical pinion drive.

The VSS bolts to the output.

It won't have anything TO leak until the speedo pinion gear housing leaks ...

RwP

 

Correct....mechanical pinion drive that's leaking.