[sqorpius]

Hi all,

Got a question regarding the filling pressure and rapid filling time for the ZF specialists out here. I've got the following values read out from my ZF8HP45 tranny, connected to a N55 engine (435i F36), and was wondering if they still are within ZF margins. Or anything odds shows up, let me know! Many thanks in advance. 

Filling pressure, Clutch A               -167.00 MBAR
Filling pressure, Clutch B               -120.00 MBAR
Filling pressure, Clutch C               39.00 MBAR
Filling pressure, Clutch D               108.00 MBAR
Filling pressure, Clutch E                146.00 MBAR
 
Rapid filling time, Clutch A           29.00 MS
Rapid filling time, Clutch B            33.00 MS
Rapid filling time, Clutch C            16.00 MS
Rapid filling time, Clutch D           5.00 MS               
Rapid filling time, Clutch E            26.00 MS

Many thanks!

[ferbmw]

Here you have some technical info I got some time ago from ZF. Hope this helps

[sqorpius]

Thanks! But it seems the values inside the PDF only show for the 6HP ZF, not 8HP, or are they the same?

[ferbmw]

Thanks! But it seems the values inside the PDF only show for the 6HP ZF, not 8HP, or are they the same?

I used these values after a gearbox reset of adapation values for my F30 with ZF 8HP. It worked.

[Alexandru.k_24]

Thanks! But it seems the values inside the PDF only show for the 6HP ZF, not 8HP, or are they the same?

I used these values after a gearbox reset of adapation values for my F30 with ZF 8HP. It worked.

What do you mean by "i used these values" ? The adaptation values are some read only values, that are directly affected by the wear of the transmission / atf.

[Enabled]

If you read them with ISTA, generally ISTA tells you the ranges.

[weby]

Rapid filling time

under 10ms = perfect
10 - 20ms = good / ok
20 - 30 ms = warning
30-50 ms = bad
50 ms = dead!


did you use the lastest EGS software?

[sqorpius]

Nope, car is still on original i-level. Do you suggest doing i-level update?

Rapid filling time

under 10ms = perfect
10 - 20ms = good / ok
20 - 30 ms = warning
30-50 ms = bad
50 ms = dead!


did you use the lastest EGS software?

---

[ferbmw]

Thanks! But it seems the values inside the PDF only show for the 6HP ZF, not 8HP, or are they the same?

I used these values after a gearbox reset of adapation values for my F30 with ZF 8HP. It worked.

What do you mean by "i used these values" ? The adaptation values are some read only values, that are directly affected by the wear of the transmission / atf.

used as a reference

[florinu]

you can reset the adaption via ISTA+ . Also if you didn`t have te latest version of EGS software , you can update it with Winkfp or ISTA-P . The easy mode is with ISTA-P