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HOWTO: ZF Transmission maps

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Here is the 1st to 2nd and 2nd to first shifts pressures explained. From here you should be able to work out the rest of the gears. To speed up the shift time you increase the shift pressure. You would normally only change the disengage (also know as off going) pressure if a gearbox has been build poorly and has trouble disengaging the gears.

This guide is a draft, please do not take it as a gospel.

UPSHIFT
ZF00567 Shift pressure 12
Pressure applied to 1st gear clutch to disengage 1st gear on upshift

ZF00603
Shift pressure tables 12
Pressure applied to 2nd gear clutch to engage 2nd gear on upshift

ZF00623

Shift pressure tables 12
"Pressure applied to 2nd gear clutch to engage 2nd gear on upshift in performance mode

Shift Pressure offset 12 ZF01446

This is an offset to the pressure based on temperature. Eg if you want to firm up shifts at certain temperatures you would increase this pressure.


DOWNSHIFT
ZF00605
Shift pressure tables 21
"Pressure applied to 1st gear clutch to engage 1st gear on downshift"

ZF00569
Shift pressure off-going clutch 21
"Pressure applied to 2nd gear clutch to disengage 2nd gear on downshift"

ZF00633
Shift Pressure 21
Pressure applied to 2nd gear clutch to disengage 2nd gear on downshift in performance mode

Here is a tree diagram (we are looking to add this into the editor to simplify things) which may help explain which tables do what

image.png.10cc9b0c3d25f0fb024e9573d50dff6d.png

Line Pressure

ZF00739

Line Pressure 1st gear

This is the pressure applied once in gear to keep it in gear. If the gearbox is flaring or slipping (you can log the transmission slip %) then you would increase this pressure.

Note that you can very quickly destroy a gearbox by changing these pressures too high or too low. Be careful.

edit: Where you see "reduced downshift" or "reduced upshift" this is apparently performance mode shifting (I do not have a ZF to confirm this on). Looking at the increased shift pressures in these maps this makes sense.

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Is there a general rule of thumb anyone is using here with stock box’s. Say like a 10% increase on line pressure?.

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44 minutes ago, will15 said:

Is there a general rule of thumb anyone is using here with stock box’s. Say like a 10% increase on line pressure?.

Giving out figures is a good way to blow up boxes. You need to take into account clutch pack wear and how the adaptive learning has learnt to change the shift pressure. People spent thousands of dollars and many years experimenting with these boxes, there is not a simple one fit all solution. Try comparing the f6 or v8 sprint stuff to a bog stock NA for some ideas. 

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@will15 you can make a ZF shift quicker and firmer without having to actually increase line pressures. Like Roland said playing with line pressures can quickly damage boxes.

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Thanks guys iv played with the 6l80e a fair bit but never with the zf, it seems even more complex. I’ll  do some comparing with different models like Roland said.

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My tip for a starting to play with a car with a zf would be to leave the line pressures alone and look at the tables mentioned above by Roland and just increase the pressures bit by bit and you’ll notice a difference, huge changes aren’t really needed.

I’d be looking at making your changes in the higher load side of things rather than the lower load areas. 

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I've got a bf xr6t and it's really lazy between 1-2. I've tried all I can but I cant seem to get it to change. Any tips ? Tried the above but no luck 

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6 minutes ago, [email protected] said:

Have your torque tables been modified? We've had instances where the car is better with the stock torque tables.

It's been tuned previously but I've compared it to a stock file and it looks like it hasnt been touched 

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