So, got a new project going on.

[heptofite]

I'm going to swap a manual transmission 2.9 computer into my b2, and to take up the slack where the auto computer controlled transmission functions, i've come up with a solution.

I'm going to link an Arduino to the VSS and TPS on the truck, and use those two figures to set up logic to activate the lockup clutch on the A4LD.

something like IF VSS >X AND TPS >Y OR <Z then +12V

but then i realized, if i've already got it picking up VSS infomation, i can do a simple math function and get it to output current MPH to serial LCD display.

but then i realized i'll have done a lot of the work required to get cruise control working, so a few more lines of code, a servo, and brake trigger information, some buttons, i'll have cruise control too.

Now i realized what a large can of worms i've opened by starting this project.

 

[heptofite]

Also, once i'm done doing this, if anybody wants one for any reason, let me know.

 

[straycat]

Also, once i'm done doing this, if anybody wants one for any reason, let me know.

Ok,what is the reason for this...better shifts? I put a Transgo shift kit in my trans many years ago (at 12,000 miles) and I have had not one issue with it. My shifts (up shifts and down shifts) are so much better then stock and are very accurate and powerful when needed. Is this something you are after Bro??

 

[adsm08]

The auto trans computer derates the engine slightly verses the manual trans computer to help save the trans clutches a little. Swapping in a manual computer gets a few ponies back, but then you lose your converter lock up.

If he can setup a standalone controller he can keep the lockup computerized, and if he can refine it enough, he can potentially swap in a 4R55 or 5R55 which are much better transmissions.

 

[mp3deviant721]

Sounds interesting. I would like to see this........

 

[Psychopete]

Will be interesting to see what you come up with. I made an electric drum set using an atmega32u4 microprocessor, but doing adc conversions and sending back to a PC over USB.

VSS is 8 pulses per rotation according to fordfuelinjection.com. I don't think you'll want to poll the VSS for a voltage reading (I sort of got the impression that would be the case with "IF VSS >", but I understand it's for simplicity), definitely check it out on a scope. Might have to use the global interrupt for digital input. Interrupt will guarantee that you record each pulse, and I think what would be ideal is to add a timer to trigger every (x)ms to calculate how many pulses it's seen to get mph. Would also make it easy to ballpark variable "X". Don't know how strong the signal can get or what the pulses would look like, may also have to add in some extra components into the circuit to normalize the input.

 

[heptofite]

Will be interesting to see what you come up with. I made an electric drum set using an atmega32u4 microprocessor, but doing adc conversions and sending back to a PC over USB.

VSS is 8 pulses per rotation according to fordfuelinjection.com. I don't think you'll want to poll the VSS for a voltage reading (I sort of got the impression that would be the case with "IF VSS >", but I understand it's for simplicity), definitely check it out on a scope. Might have to use the global interrupt for digital input. Interrupt will guarantee that you record each pulse, and I think what would be ideal is to add a timer to trigger every (x)ms to calculate how many pulses it's seen to get mph. Would also make it easy to ballpark variable "X". Don't know how strong the signal can get or what the pulses would look like, may also have to add in some extra components into the circuit to normalize the input.

yeah i was actually going to use logic to count the pulses from the vss, rather than attempt a voltage reading, the arduino has that capacity.

what i'm wondering though, now that ADSM has brought it up, how is the 4r44e signaled to shift?

is it as simple as hitting +12 on a wire to pick a gear, or does the computer have to activate individual servos to get the task accomplished?

 

[bobbywalter]

for the 86?


whats wrong with drilling and tapping a pressure switch?

 

[4.0B2]

i am so confused.... i feel dumb lol.

sounds interesting. i'd love to see it... i want one! lol.. just b/c!

 

[lethal-threat-b288]

 

[heptofite]

for the 86?


whats wrong with drilling and tapping a pressure switch?

a pressure switch for what?

 

[bobbywalter]

lockup

 

[heptofite]

pretty sure this is better in pretty much every imaginable way, I'll have extremely accurate control of lockup conditions, as opposed to relying on transmission fluid pressure.

edit: it also opens up the door to making a cheap-as-dirt standalone to shift a fully electronic transmission.

i get that working well enough, i can sell pre-programmed units and make a killing.

 

[4.0B2]

i'm still curious..
you should make a video or something...

 

[adsm08]

what i'm wondering though, now that ADSM has brought it up, how is the 4r44e signaled to shift?

is it as simple as hitting +12 on a wire to pick a gear, or does the computer have to activate individual servos to get the task accomplished?

A series of solenoids signaled on or off to open or close hydraulic passages and control fluid flow to release or apply the clutches.