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> Megashift Trans Controller, Controlling Boxster/996 Tiptronic Boxes?
Chris H.
post Mar 20 2017, 08:20 AM
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Hey All,

I'm working on a solution for a certain large, square German vehicle and wanted to bounce this off of the electronics gurus. Might also be helpful down the road for those who might want to do a tiptronic Boxster trans in their 914s.

So...the challenge for me is that there are only a couple of automatic transmissions that are pointed in the right direction to use in the Vanagon and only one that can handle more than ~150 hp for a significant period of time. That would be the 911 tiptronic. My initial thought was to use a 964/993 trans which does not have a key driven immobilizer. Looking through the wiring diagrams I THINK I can figure out a way to run it with the stock TCU.

But then I found the Megashift trans controller:

Megashift!

IF (big if) I am reading the directions right, it appears you need the shift solenoid configuration (probably more stuff too), and then it should be fairly easy to control.

So the questions are:

1. How easy/hard do you think this would be? Seems like you program the solenoid shift config for each gear, kick down, a few other settings like idle increase, etc?

2. Since the security logic for the immobilizer is not associated with the trans itself, do you think this fully bypasses the immobilizer? Seems like it but I know very little about the tiptronic box.

3. Is there another stock automatic TCU from a VW or Audi that could be adapted to run this? EDIT: The Passat TCU MIGHT WORK. Same trans model #...ZF5HP19... (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/idea.gif) (IMG:style_emoticons/default/idea.gif)

If we can make this work it could be a great thing for those wanting/needing an automatic solution. I'll give it a shot if the feedback is good.
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Chris H.
post Mar 20 2017, 07:31 PM
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Another good one! I'll need them either way if I do a 1.8t.

I traded emails with the guy who sells the controllers Falcor posted and learned (by accident) that there were two tiptronics used on the 996. All years of turbos and ALL 2002 and newer tip cars used the Mercedes trans. Prior to that the ZF5HP19 was used. Allegedly the Mercedes trans is "the best tiptronic ever made". The dilemma here is that the Passat controller MIGHT actually control the ZF trans, but the one that has a really nice ready-made system is the Mercedes trans. Mike Bellis also reminded me I want a 1999 or older TCU if I use a stock one. Seems like the safe money is the Mercedes trans and the $700 (shipped) TCU all wired up and ready to go.

Anyone HAPPEN TO HAVE a ZF tiptronic trans (Boxster or 996) just laying around that I could wire a Passat TCU to? Doubt it (IMG:style_emoticons/default/lol-2.gif) .

So the 1.8T SHOULD bolt right up to either of these right? I assume so since there is a guy on The Samba installing a 1.8t into a Boxster.
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falcor75
post Mar 20 2017, 11:50 PM
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QUOTE(Chris H. @ Mar 21 2017, 02:31 AM) *

Another good one! I'll need them either way if I do a 1.8t.

I traded emails with the guy who sells the controllers Falcor posted and learned (by accident) that there were two tiptronics used on the 996. All years of turbos and ALL 2002 and newer tip cars used the Mercedes trans. Prior to that the ZF5HP19 was used. Allegedly the Mercedes trans is "the best tiptronic ever made". The dilemma here is that the Passat controller MIGHT actually control the ZF trans, but the one that has a really nice ready-made system is the Mercedes trans. Mike Bellis also reminded me I want a 1999 or older TCU if I use a stock one. Seems like the safe money is the Mercedes trans and the $700 (shipped) TCU all wired up and ready to go.

Anyone HAPPEN TO HAVE a ZF tiptronic trans (Boxster or 996) just laying around that I could wire a Passat TCU to? Doubt it (IMG:style_emoticons/default/lol-2.gif) .

So the 1.8T SHOULD bolt right up to either of these right? I assume so since there is a guy on The Samba installing a 1.8t into a Boxster.


I cant say if the 1.8t bolts up or not but if you are going 1.8t get an early AEB code US spec ecu. 1995- 1996, the earlier the better because the early ones had no immobilizer at all. I had huuge issues with defeating the immobilizer in the 1.8T AJL (1998 MY) engine I put into my Mk1 Scirocco. Finally I got an AEB (1996) ecu from a dismantler in northern CA and used that to get my engine running. Zero issues with that ecu.

(IMG:http://www.914world.com/bbs2/uploads_offsite/matsgarage.com-15176-1490075530.1.jpg)
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