gafitanu

Plutoe

Your post does not make sense----please reread and try to answer the question yourself!

kjb55

It's possible that they installed the drain plug before the drain flow rate was at a drip. The level plug (plastic insert in pan) was revised to allow for more fluid and an extra pint wouldn't make any difference. My preference would be to have the extra pint.

gafitanu

gafitanu

I did not add any more ATF, the car appeared to be running fine until yesterday. Coming home from work, at some point it appeared to be slipping and not shift higher than 5th. I was still able to drive it at 75mph although 2800 rpm. No CEL and no warning or fault message. At home I pumped up another quart of ATF. I drove it and all appeared to be normal except for downshifts when slowing to a stop that were harsh. Hooked up the DAS and I read error 2201 speed sensor error stored. Cleared the error drove it again and no error showed up. This morning it drove fine.
Am I heading towards a valve body replacement or it could have been a result of low fluid level? I would rather just replace the 2 speed sensors to avoid replacing the entire valve body. Anybody did that?
BTW, it's a 722.9.

kajtek1

I don't get it. You go under the car, open the plug, pump the ATF in and don't wait for ATF to come to 45C to confirm correct level?
You are risking expensive transmission for senseless play. Than since you are down there, why not to make full ATF exchange?
Dealer overfilling ? NAAaaahh

gafitanu

The ATF was at 40C when I did this so the level is OK.

kajtek1

I double check, as recommended temp can be confusing and it is 45C=113F.
We all have different logic we use in our life, but for me, when I have trouble with a car - I always start with basics who are cheap and need to be done regardless.
You have problem with transmission- it can be amazing how many things 9l of fresh atf can do.
We still don't know total mileage and mileage since service?
You need to try to be more specific in your posts.
One time you said you check the level to be correct, then you add 1 quart?

gafitanu

I agree Krzysztof, the fluid looked brown and not red. A fluid change is not a big deal although I think the speed sensor malfunction is not related.

tjts1

Well **** now you tell us.

kajtek1

7G proves themselves pretty good transmissions, so not too much DIY wisdom.
But I still remember that on 5G leaky orings on pilot bushing would contaminate the wires and small shorts would trigger...... speed sensor errors.
Than again, basic service is basic and not much sense to crawl around it.

tjts1

efonz

your transmission is slipping due to the loss of ATF when you replaced the radiator; compensate for loss fluid.
Same happened to me when I changed my radiator, had to buy the pump, adapter and stress myself out in
order to correct the slipping. MBII will indicate if gear slipping.

gafitanu

You are right. I added what I think was the lost volume and I didn't have any problems for the last 2 weeks.