I changed the tranny fluid (and filter) last weekend with 8 liters of Dr. Z's secret profit formula. The old fluid was dark, as expected, but there was nothing unusual in the pan - not bad for 95K.

Now I notice that the up- or downshift from second to third is clunky, and the downshift to second causes a noticeable drop in RPM when slowing to a stop, as if this might eventually cause a stalling problem. Maybe it's staying in third too long, and then finally clunking hard into second when it realizes it better move along.

Any alternatives to visiting one of Dr. Z's US henchmen, who will automatically overcharge me as step 1 of their diagnostic procedure?

Thanks,
Tom

With the engine and transmission at full operating temperature, you could try filling the transmission all the way to, but not past the full 80 degree mark on the dipstick.

When I replaced mine with the new 722.9 fluid I did this and noticed an improvement in shift quality.

__________________
2005 Pathfinder LE
2001 E55
1998 M3
1982 320i

I think that it is difficult to get every drop of fluid out even if left draining overnight. The factory fill is 8L. You mention putting in 8L but don't state you checked the level with the factory dip stick tool. I think most DIY have put in something less than 8L generally.

The fill level and measurement temp are critical, are you certain it is not overfilled?

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

But I would also say that there was no difference in shift quality from when the fluid was at the low end of the dipstick.

But you do raise a good point. My trannie is the 722.623 (behemoth) for the 430. The owners manual actually lists over 9 Liters as the ATF capacity, but the Alldata site lists 8.2L.

Mine (also a 99) is listed as a 722.608. My manual lists 8L.

Perhaps your 722.623 is underfilled if the correct fill is 9L?

I think most poeple put back a few hundred ML less than a factory fill as the valve body will hold some fluid.

The key is the knowing the temp of the fluid when checked and the dip stick tool.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Overconfident though I was that I had filled the fluid to the rim with Dr Z's snake oil, I checked the level again several days later and, indeed, there was room for more. Eager, as I was, to line the DaimlerKreißler pockets with yet more of my hard-earned cash, I bought another liter of of Sindelfingen Syrup and poured about half in. I am pleased to report that, contrary to all reason and common sense, the extra half-liter seems to half done the trick, as I have now been driving nearly two weeks enjoying once again the silky-smooth shifting that 722.6 owners have come to intermittently experience.

In hindsight, this makes perfect sense: the DCX profit control unit wouldn't send an "OK" signal until it had calculated that I had bought enough genuine MB oil. In any case, it may take another level reading later to give a accurate indication. My total refill was 8.5 Liters, while I drained only about 7.2 out.