does anyone know of a tsb for trans a518,leaking at the speedometer sensor? was leaking put in new sensor,took few months but leak again.
thank you

 

there are no tsb's about it on alldata.

 

Exactly where on the speed sensor is it leaking? This may be difficult to determine but is essential to solving the problem. Is it at the connection of the sensor to the adaptor, around the adaptor/case, or thru the sensor itself?

Correct me if I am wrong here but there are two parts here that we must look at. There is the sensor that should not even see any oil normally and there is an adaptor that should be sealing the oil inside the trans. I think you will find the adaptor is the actual problem.

The adaptor has an outside o-ring to seal it to the case. It also has on internal seal/0-ring that seals the adaptors drive shaft to the adaptors body. One of these is leaking and I would replace them both with parts from the dealership and here is why. Some of the seals in a trans are meant to swell when in the presence of hydraulic fluid to help them seal correctly and I am not positive if either of these seals fall into this category but I would not take the chance.

Here is a site that you may find useful for the trans you have. You can refer to it or even download the manual if you want. Page 17 shows your sensor.

http://www.scribd.com/doc/228727/Dod...Service-Manual

 

thanks seal, for the great info on these trannys.
i have a sevice manual on disk,i saw the 2 inner seals on the adapter.
i'll have to order them from dealer. i remember seeing a tsb about this somewhere,but dont remember where. thank you for your wisdom

 

You are welcome. I am just glad I could help. Now I hope I am right. LOL

 

well the internal seal is not available from the dealer,discontinued.
cleaned it all up for the heck of it,changed the o-ring adapter to trans case. dealer had this one in stock. found a tsb for 94-95 with same problem. im just going to buy a new speedometer adapter housing,i think this adapter is discontinued,but i found one in calif. at a dealer,20.55.
good deal?? it was 45.00 thank you

 

I just put a trans kit in mine and replaced that seal that they told you was discontinued. I got it from the dealer so they are still available. I got the same story you did from the parts guys but I then went out in the shop and talked to the tranny rebuild guy and he went into the parts department and came out with one. I then paid a rather sheepishly embarrassed parts guy and left with the part.

 

these parts guys at the dealers are just to lazy to look up something up that doesnt involve a computer,had many dodges since the late 80's,im used to there ways.
anyway i just figured i would get a new adapter and at a later time i would find that seal and have a spare one for future use. thanks take care