Leon Speed

I need new search mojo - can't find anything.

Anyone have the sizes for the drain plugs on the auto trans pan and torque converter?

Also, is the pan seal replaced as part of the ATF and filter change?

Thanks

SeanR

10x14 I think.

And yes to the gasket.

I know Roger sends out two seals, one pan gasket and a filter with his trans kits.

Leon Speed

Ah a man of daily 928 wrenching experience! Thanks for the quick reply!

Leon Speed

I was looking for the documentation of the updated MB seal but cannot find that either. And I thought I had it saved

I should just send Roger an email to order.

StratfordShark

I changed tranny filter a few months back, and the service kit still had the old pan gasket.

There was a problem in past with gasket splitting round one of bolt holes. Mercedes changed to thicker gasket and Porsche followed several years later.

But I was very careful torqueing pan bolts (used 1/4" torque wrench, tightened bolts in star pattern and in stages up to the specified 8Nm) and gasket fine so far - dry as a bone.

The date on the service kit was post time Porsche changed seal (p/n different in revised gasket), but it still had that old gasket.

Avar928

Just did a transmission service last month. Call Roger and get the kit from him. I believe it comes with one washer seal for the bolt.

Replace the pan gasket with the filter. You should also get the K1-upgrade spring and replace the kickdown spring while you're in there.

Leon Speed

I know! I used Roger's kit before.

As to the K1 spring, I thought this applied to olders models and/or trans flare but I might be wrong.

The kickdown spring is a good idea.

davek9

You may also consider the filler cap and tank to pan seals too.

Avar928

Pull the reservoir and clean it up too. Careful of the tube that attaches to the top, should pull right out from the nipple but be careful. May be brittle.

SeanR

Oh yea, forgot about the K1 spring kit. I replace those on every trans fluid/filter job I do. Unless of course I've done it previously.

Leon Speed

So did you get a kit locally or from Roger? I think I got the updated one from Roger with my kit three years ago.

Leon Speed

Thanks, I had it on the list.

Thanks, I did that last year.

So it's one of those preventive items then. The trans is still unknown territory to me but what the heck, so was the timing belt, cam towers and intake and it runs better than ever. I need to read up on the K1 spring, but is that the only one changed out preventively? There are (many) more springs in the valve body.

Avar928

It's preventive if you don't have that 2-3 flare (yet). Since you're in there, may as well replace it. It's literally an extra 5-10 minutes and it's only that long because you just need to be careful with the screws. They're on there pretty tight so I had to use a flat head adapter on my socket wrench to break them loose.

http://w123maintenance.blogspot.com/...ement-and.html

Make sure you have a bucket to catch ATF before you swing back that panel. There's quite a bit in there.

Leon Speed

Great link, thanks!!

traxtar928

What's the 2-3 flare? Is that a small surge (jump in RPM's, almost like a missed shift) when the auto trans shifts? I've noticed this a few times recently... and was hoping a simple fluid change would remedy it. Would buying the k1 spring kit fix that problem? Glad I found this, if that's the remedy.