2 Q for 4l80e

A forum for discussing applications and implementations of the MegaShift transmission controller code for the GPIO from B&G. This can control up to 8-speeds and 6 shift solenoids (plus a 16x9 table for controlling a PWM line pressure valve). It has manual and fully automatic modes (16x9 load x speed table), with under and over rev-limit protection, and full data logging of all inputs and outputs (among many other abilities). A TransStim to test your completed board is also available.
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tobmag
Posts: 206
Joined: Mon Jan 02, 2012 4:22 am

2 Q for 4l80e

Post by tobmag »

Hi Guys.

I'm thinking of using the MSgpio for controlling my 4l80e in my Jaguar but have 2 qustions.

Is it possible to use another load rather then map signal, best would be like ITB mode for me.
What I can see on other aftermarket TECU they all use TPS signal.

Will there be any possibility for a 2nd map rathet then chaning between 2/4 wheel drive?

BR//Tobmag
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: 2 Q for 4l80e

Post by Bernard Fife »

Tobmag,

The default code 2.111 currently lets you select the load parameter:

- In CAN mode (w/ MS-II, etc.) you can choose between MAP and TPS. More here: http://www.msgpio.com/manuals/mshift/V2tune.html#oa

- In standalone mode (non-CAN) you can use any 0 to 5V signal you like for load. See: http://www.msgpio.com/manuals/mshift/V2tune.html#gl

A second shift table is a possibility. There is already a 2/4WD switch in the code for the changing the speedometer, and if enough people need the second shift table, I will consider adding it.

Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: 2 Q for 4l80e

Post by Bernard Fife »

Tobmag,

Adding the second table turned out to be trivial, so I just did it while waiting for something decent to come on TV. The second table is triggered by the 2WD/4WD switch (http://www.msgpio.com/manuals/mshift/V4tune.html#gi).

This lets users have a speedo correction factor (if needed, otherwise set it to 1.000) and an independent 12x12 shift table (with its own speed and load bins) at the push of a button.

I haven't tested this yet, but will do so over the next few days and release the code as a beta (http://www.msgpio.com/manuals/mshift/V4code.html).

Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
tobmag
Posts: 206
Joined: Mon Jan 02, 2012 4:22 am

Re: 2 Q for 4l80e

Post by tobmag »

Hi Lance.

Thanks for your quick reply,

Ok so I can shoose MAP or TPS, then I'm fine

Will look forward to see how the map switching works.

Anyway, I'm still in the early stages of the project so nothing will spin in the next 12 months.

BR//Tobmag
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