Transmission Tuning (advanced tech)

[Robottrainer]

Its never straightforward, is it? anyhow. Im 100% certain Mud is track mode. When I look at so it wont coast down, the value in Mud mode has the 2 to 1 down shift at 0 downshoot. My setting have made the car alot nicer to drive. If I can change anything-Track Mode with the same coast down as Sport. Sport with the same fast and firm shift as track mode set to ALT2.

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[engineermike]

I missed the "stroke phase" earlier. Mind blowing that it goes through these 4 phases for every shift, especially considering the inertia phase has 5 sub-phases.

 

[Robottrainer]

I missed the "stroke phase" earlier. Mind blowing that it goes through these 4 phases for every shift, especially considering the inertia phase has 5 sub-phases.

I wonder of inertia is the fluid inertia, or clutch piston inertia. Amazing how this all used to be done with springs and valves.

 

[engineermike]

I wonder of inertia is the fluid inertia, or clutch piston inertia.

I believe it’s engine inertia.

 

[Robottrainer]

I believe it’s engine inertia.

Wow! That's a hell if a calculation. Crank. Converter. But then again solid modeling males it easy.

 

[Robottrainer]

Wow! That's a hell if a calculation. Crank. Converter. But then again solid modeling males it easy.

Inertia should be a constant

 

[engineermike]

I’m certain that ford performs torsional natural frequency analysis and once that’s done, rotational inertia can just be plucked from it.

 

[K4fxd]

Amazing how this all used to be done with springs and valves.

The springs and valves worked better IMO.

 

[engineermike]

The springs and valves worked better IMO.

Maybe with 2 or 3 gears. They weren’t great with 4 and I can’t imagine that working with 10. What would the governor look like?!

 

[K4fxd]

Maybe with 2 or 3 gears. They weren’t great with 4 and I can’t imagine that working with 10. What would the governor look like?!

I agree, the 3 speeds were rock solid even when abused.

It does seem like a lot of these electronic controls are just because we can.

When the pipe mill industry went from relays to PLC's the quality and production numbers went down. One company wanted to stay with the relays but the only ones made would not hold up. The quality went to shit. One issue was the old relays had solid copper contacts the new had copper plated zink or something.

Anyway if they used the electronics like the valves and springs would the transmissions work better and last longer?

 

[shogun32]

It does seem like a lot of these electronic controls are just because we can.

I wish engineers (and management) would just reacquaint themselves with the word 'NO'. Chasing ever smaller "improvements" is why we have 10 gears, 3,000,000 lines of control software, dedicated cpus, and 23 damn modules and CAN bus. Enough already. 2 hydraulic pistons and a leg and arm is all you need to change gears. So instead of a hill-billy of questionable IQ who can rebuild a clutch and transmission with one eye and a mason jar of moonshine in one hand, we now need an army of software engineers, compilers, linkers, firmware flashers, eproms and god knows what other thousand things to do anything useful with the damn transmission. What is this if not a collossal mal-investment and deliberately introduced fragility and failure modes?

I suspect we could implement the old '3 speed' by nesting it inside a '2 speed' hi/low like the big semis use.

 

[Robottrainer]

Maybe with 2 or 3 gears. They weren’t great with 4 and I can’t imagine that working with 10. What would the governor look like?!

Manual valve body. Simple. All full line pressure. A couple of restrictions to help coordinate the shifts...

 

[Robottrainer]

I wish engineers (and management) would just reacquaint themselves with the word 'NO'. Chasing ever smaller "improvements" is why we have 10 gears, 3,000,000 lines of control software, dedicated cpus, and 23 damn modules and CAN bus. Enough already. 2 hydraulic pistons and a leg and arm is all you need to change gears. So instead of a hill-billy of questionable IQ who can rebuild a clutch and transmission with one eye and a mason jar of moonshine in one hand, we now need an army of software engineers, compilers, linkers, firmware flashers, eproms and god knows what other thousand things to do anything useful with the damn transmission. What is this if not a collossal mal-investment and deliberately introduced fragility and failure modes?

I suspect we could implement the old '3 speed' by nesting it inside a '2 speed' hi/low like the big semis use.

You won't see 50 year old S550. One day these modules will evaporate. Just look what happened with the chip shortage. The only way to keep a 50 year old S550 operating is probably going back to a carburated or aftermarket FI windsor based small block and a C4/C6.

 

[Buldawg76]

You won't see 50 year old S550. One day these modules will evaporate. Just look what happened with the chip shortage. The only way to keep a 50 year old S550 operating is probably going back to a carburated or aftermarket FI windsor based small block and a C4/C6.

I miss the simple old cars of my youth.

BD

 

[engineermike]

I initially thought the same thing when I got into engine tuning, but changed my mind once I learned how it all works. If you think about it, the gdi, tivct, advanced knock control, and 10 speeds have enabled performance levels that just were not possible with 3 gears, static cams, no knock control, and port injection or carburetors. Just take the individual cylinder knock algorithms and gdi control…these both require 0.1 crank angle deg level of sensing and control at max rpm, only enabled by modern lightning-fast processor speeds.

I can’t speak super-intelligently on the transmission side because I’ve only scratched the surface (hence, this thread). But things like torque modulation, where it can Instantaneously cut engine torque from 600 ftlb to 300 for 20 ms while the shift executes, requires some level of coordination between the engine and trans, and the complication that goes along with that. I can only assume there is good reason for the parts I don’t understand. I do have to wonder, though, how they can do so much with only 2 solenoids controlling a gearshift and only 3 shaft speed sensors as feedback.

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