722.6 Transmission: Always replace 13-pin connector when doing tranny service?
 

Those of you with 722.6 transmissions....are you finding that it's always a good idea, when you replace the gasket and filter, to replace the 13-pin electrical connector that has historically been prone to leaking ? Or has its redesign over the years made it not so susceptible to leaks such that you can leave it alone until it actually starts leaking?

the latest design has two black O rings on it, they are quite thick too, This design does not leak and MB says to paint a green mark on it to identify from the outside as the O rings will not seal when reinstalled - unless you can somehow find the replacement O rings.

I bought mine from a Dodge dealer - this transmission is also found in chargers/challengers/jeeps etc.

That's interesting. My indie replaced mine when I bought the car in the fall as it was leaking. So presumably he used the latest design and I shouldn't have to worry about it when I change the fluid/filter in 50k miles.

190k miles and no replacement yet

I'd say change it once with the black o ring unit. The one on my 97 C280 ( 161 K ) was just changed due to leakage at the wiring connector.

There are two o rings on the case connecto, the outer one keeps fluid from dripping on the ground, the inner one keeps oil from leaking into the wire connector.

The wire connector also has an o ring to keep water out.

It is against my religion to fix anything that is not broken. A sure way to get a leaking connector is to keep changing the non-leaking ones. Eventually you will put in one that will leak.

If yours is unknown then replace it, the original ones had white nylon type O rings, the mid life update ones had red O rings (they also flatten over time)

the last one are the correct ones and please do not buy URO or anything else than a genuine MB product (chrysler also sell the genuine MB product) - they have really thick O rings - and require a good slathering of lubricant to install it otherwise it will leak as the O rings will not be seated. the torque for the little screw is a very gentle touch past contact - 2.5 nm

I have about roughly about 200 13 pin connectors saved from over the years in excess. So I put them in with new o-rings every time. You don't probably have as many adapter plugs as me, so it really isn't necessary to replace it every time to try and get rid of some. :D:rolleyes:

Some guys on the other forums say do it every time, it really IS not that necessary at all. Don't do it unless it's leaking! It's a waste.

I change parts when they are near the end of their expected service lives. I'd rather have a car down on my schedule and not at random.

If I saw it weeping from the seal then yes, otherwise leave alone. That said, if the seal is a known issue and inside the sump then yes, go for it during an ATF change.

Sounds like it WAS a known issue but now not because of the design change.

where did you buy the O rings, I am also of the school that why waste a part for only 2 piddly O rings, but I could not find them anywhere.