[Cyberdemon]

Originally Posted by Kiwi

BMW's 8 speed is built to BMW's standards and as you know there is always the discount seconds factory to any manufacturing company and ZF's seconds factory is called Jeep.��

ZF is an independent German supplier. The 9 speed used on the Jeep is also used on Acura, Honda, Land Rover, and other Chrysler cars.

The software is written by Chrysler, which tuned the transmission for aggressive upshifts to maximize fuel economy and has not been received well.

I've driven the new MDX which has the same transmission and doesn't have any of those issues, so it has nothing to do with BMW standards or ZF standards, just the tuning of the software.

[Pyewacket69]

Originally Posted by Cyberdemon

My wife owns the Jeep, and the 9 speed isn't even in the same league.

Don't ask me how they got it so wrong when the ZF8 is so right.

The 9 speed shifts brutally hard, never goes into 9th gear, and is as predictive as Stevie Wonder.

The 9 speed drives like an auto did in 2002, just with more speeds. The ZF8 drives better than most DSG gearboxes.

So maybe while they're in there hacking, they can fix the transmission software.

I like your optimism...

That would be a far steeper challenge for a hacker.

Of course, the point I made was that any manufacturer can design a dud every now and then. Even BMW is having a time of it with its 8-cylinder N-63 engine. A good friend of mine has a 6-Series vert with one of these engines... And it came with lots of "issues".

I do agree, however, it is a bit puzzling how ZF could make such a fantastic 8-speed auto and also turn out a 9-speed auto that seems to be so problematic. Perhaps they used different engineering teams in the development... Who knows?

I doubt ZF decided to build a failure just because Fiat Chrysler wanted a cheap tranny, though. After all, every potential customer of ZF knows who manufactured those 9-speeds.

In your case, I hope the do eventually get the bugs out. Good luck!

[Pyewacket69]

Originally Posted by Cyberdemon

ZF is an independent German supplier. The 9 speed used on the Jeep is also used on Acura, Honda, Land Rover, and other Chrysler cars.

The software is written by Chrysler, which tuned the transmission for aggressive upshifts to maximize fuel economy and has not been received well.

I've driven the new MDX which has the same transmission and doesn't have any of those issues, so it has nothing to do with BMW standards or ZF standards, just the tuning of the software.

Well, that would certainly explain why Chrysler has the issues while others do not.

[Kiwi]

Originally Posted by Cyberdemon

ZF is an independent German supplier. The 9 speed used on the Jeep is also used on Acura, Honda, Land Rover, and other Chrysler cars.

The software is written by Chrysler, which tuned the transmission for aggressive upshifts to maximize fuel economy and has not been received well.

I've driven the new MDX which has the same transmission and doesn't have any of those issues, so it has nothing to do with BMW standards or ZF standards, just the tuning of the software.

ZF would be involved in the software as well at a discount rate.

It's all about Jeep and their problem but the media try to make it everyones problem.

[Pyewacket69]

Originally Posted by Kiwi

It's all about Jeep and their problem but the media try to make it everyones problem.

Exactly how is the media doing that?