Auto trans leak
Former Vendor
Joined: Feb 2005
Posts: 15,228
Likes: 2,530
From: Anaheim
For what it’s worth, the 5-speed is only of true value when installed in the CS/GT variant as those are more of a muscle car mindset and the whole dynamics are changed (including engine, coding and suspension settings). For day to day driving and enjoying the 928 for what it is, a true Grand Tourer, the automatic fits its personality and useability best. Like Fred said, the MB 722.3 is an amazing transmission that is rock solid and performs very well for a 300HP car.
I'm also older, than most every single one of m clients, I'm guessing.
I love the 4 speed automatics.
I can tune them so that they don't "seek" 4th gear by the time they get to the crosswalk on the other side of the intersection.
I can tune them so the driver has more "control".
I can tune them so they start in any gear the client wants them to start in.
Fantastic to drive!
The downside, for a dedicated GT car, is that the automatic can downshift/upshift in the middle of a corner...upsetting the car.
And in the rain/snow, one needs to be even more careful of this "issue". A downshift/upshift in the middle of a "slick" corner will make your heart beat faster.
Rennlist Member
Joined: Jun 2005
Posts: 10,578
Likes: 1,030
From: Oman
The beauty of these units is their relative simplicity. New seals all round, check the thickness of the friction plates do the job right and you buy a shed load of service life all being well.
Rennlist Member
Joined: Jul 2008
Posts: 3,089
Likes: 1,455
From: Near Hamburg-Germany
I live in Kalifornia, where there can be a traffic jamb at 2AM on a freeway with 4 lanes both ways.
I'm also older, than most every single one of m clients, I'm guessing.
I love the 4 speed automatics.
I can tune them so that they don't "seek" 4th gear by the time they get to the crosswalk on the other side of the intersection.
I can tune them so the driver has more "control".
I can tune them so they start in any gear the client wants them to start in.
Fantastic to drive!
The downside, for a dedicated GT car, is that the automatic can downshift/upshift in the middle of a corner...upsetting the car.
And in the rain/snow, one needs to be even more careful of this "issue". A downshift/upshift in the middle of a "slick" corner will make your heart beat faster.
I'm also older, than most every single one of m clients, I'm guessing.
I love the 4 speed automatics.
I can tune them so that they don't "seek" 4th gear by the time they get to the crosswalk on the other side of the intersection.
I can tune them so the driver has more "control".
I can tune them so they start in any gear the client wants them to start in.
Fantastic to drive!
The downside, for a dedicated GT car, is that the automatic can downshift/upshift in the middle of a corner...upsetting the car.
And in the rain/snow, one needs to be even more careful of this "issue". A downshift/upshift in the middle of a "slick" corner will make your heart beat faster.
The 5. gear and a Euro or Gt engine transforms the car on open roads to pure pleasure.
Uncontrolled downshifting let the most drivers loose control over the car in wet conditions or with older tires.
10 years ago I do 3 spins on the Autobahn in Oktober on a partial wet road at 120 kmh. A lot of luck and a broken Fender and the pants ful.
The 928 has superb balance but if the rear end comes the auto is inadequate.
If I will drive an auto, I buy a Mercedes S class or my S8.
Rennlist Member
Joined: Apr 2007
Posts: 1,976
Likes: 185
my apologies if this response is redundant. Yes, you can replace front seals including TC seal, front pump and piston seals yourself, which may solve the annoying leak. It won’t address anything behind the leak. Within a few days I’ll publish links with advise from Greg, Stan and others about getting these seals replaced. Bear in mind, there are subtle steps that if missed, can derail success even in these modest refreshes. If you can determine the extent of functionality of the transmission as it currently is, perhaps Greg or some qualified mechanic can replace just “what is broke”, and get your transmission going.
just bear in mind that if you venture into replacing these yourself, you’ll spend realistically 10x as much time researching/studying as you will actually spend time in wrenching, and you’ll doubt yourself a great deal.
just bear in mind that if you venture into replacing these yourself, you’ll spend realistically 10x as much time researching/studying as you will actually spend time in wrenching, and you’ll doubt yourself a great deal.
Last edited by mj1pate; Apr 2, 2022 at 09:25 AM.
Thread Starter
Pro
Joined: Sep 2004
Posts: 535
Likes: 76
From: Burlington Wi
Thanks. I did drive the car for a bit and it shifts just fine. I have documentation showing some trans services were done prior to my ownership and I need to dig into that again to see where everything is at from a mileage stand point.
My 914-6 will be out of storage soon so the 928 will be back burner for the summer but plan to get the paint work done and a few more things done before the project gets put on hold.
My 914-6 will be out of storage soon so the 928 will be back burner for the summer but plan to get the paint work done and a few more things done before the project gets put on hold.
