Zf4hp24

Fozwanger · Post by **Fozwanger** » Sat Dec 19, 2015 4:07 pm

Has.anyone run a zf4hp24 without an ecu or another box?

I want to run without the ecu and just use paddle shifters to operate the ds. You can use R N and D (in third) without 12v power.

I'm trying to find out about line pressures and the lock up function on the 3rd solenoid. I've come up with a solution to run the box as a sequential box with paddle shifters but need to understand the effect of line pressures and why I'd need to run the solenoid with a pwm signal.

Also, jag used them, as far as I can discover the cases are all the same, just bell housing and tails hafts are different. Would anybody know if the input shafts are the same length too? Can I use. P38 bell housing and convertor or do I need to use a p38 box with 2wd tail housing?

Jef

ChrisJC · Post by **ChrisJC** » Sat Dec 19, 2015 11:53 pm

I believe all the input shafts are the same, and the differences between engines and bellhousings are accommodated with the torque converter, flex plate and ring gear assembly.

Chris.

Fozwanger · Post by **Fozwanger** » Tue Dec 22, 2015 10:53 am

Does anyone know the solenoid sequencing on the zf4HP24 gearbox?
I'm going to run the box with a PLC and have it fully sequential using the TOSS signal to lock up the torque converter as well and for the speed.

I just need to figure out how the solenoids operate to give you which specific gear. Once I got it working I'll post a how to thread up

DaveEFI · Post by **DaveEFI** » Tue Dec 22, 2015 11:13 am

MegaSquirt do an auto gearbox ECU, and although the 4HP isn't directly covered, you may find some useful info on their forum.

Fozwanger · Post by **Fozwanger** » Tue Dec 22, 2015 6:47 pm

I've found the information on BMW forum. Watch this space......

Eliot · Post by **Eliot** » Tue Dec 22, 2015 6:51 pm

DaveEFI wrote:MegaSquirt do an auto gearbox ECU, and although the 4HP isn't directly covered, you may find some useful info on their forum.

Indeed - should be easy enough to get megasquirt to do it.

Fozwanger · Post by **Fozwanger** » Wed Jul 06, 2016 1:16 pm

Is there a uk stockist for ms shift?

DaveEFI · Post by **DaveEFI** » Wed Jul 06, 2016 2:36 pm

Fozwanger wrote:Is there a uk stockist for ms shift?

If you don't get any luck, place to ask is here:-

http://www.msgpio.com/forums/index.php

Fozwanger · Post by **Fozwanger** » Wed Jul 06, 2016 4:35 pm

Thank you

Fozwanger · Post by **Fozwanger** » Wed Jul 13, 2016 7:28 pm

I've taken the plunge and bought one, I'll let you know how I get on!!!