ZF 9hp48 Theory of Operation

In this action packed 2 hour long video, I cover the theory of operation of the ZF 9HP 48 transaxle. You'll learn it's applications, service procedures, TSBs, Solenoid and clutch application, electronic control, powerflow, gearset layout and connections, and rebuilding particulars (things to watch out for). This video is part of an Automatic Transmissions course at SIU. Students watch these videos to compliment what they learn in lab when they overhaul these transmissions.

[ConcreteJungleGames]

Incredibly valuable presentation. Thank you for sharing this.

[michaelstapleford]

At 56:17, I think the E-clutch at the front of the trans (left side of screen) is mis-labeled as the B-clutch.

[zroger]

You stated that the dog clutches use proportional control, but the symbols indicate that their solenoids are either on or off. The drawing makes more sense since unlike the friction clutches, the dog clutches are either engaged or disengaged with no state in between.

[andrejzupevc]

Thank you for sharing your knowledge. Respect.

[maxnguyen]

Amazing info. Thank so much for your time.

[djpunisha]

Question when measuring the oil level, you say dip stick, which dipstick? Dipstick for engine oil or is there a special dip stick for transmission?

[sbond]

Regarding the FCA transmission and 140 mm dipstick. Are you checking with the engine running like historical transmission fluid checks?

[thekevinman]

So even though the oil service between FCA and Honda is different, could you service Honda like a FCA and vise versa and be fine?

[Sweaty__Palms]

Hi, I've got a question -what happens when it shifts from 3rd to 4 gear? I always hear a kind of scratching sound when it shifts 3 to 4. What should I check first? Thank you!

[zroger]

Could the reason for the difference in D clutch application in park/neutral have to do with some of these transmissions starting in 2nd gear (i.e. newer Hondas) by default?

[barbrolidman]

After reinstall in car my Cherokee 948TE shows in Drive when I turn on key, no matter what position shifter cable is placed in the trans, clicking through detents yields no change in display. Unplugging TCM from transmission makes display go blank. What are possible internal culprits?

[SHURIKAUTO]

Hello. on the new 9HP48 units we saw a DIFFERENT torque converter. This torque converter has an additional mechanism inside. Looking at the outside of the torque converter, the modified torque converter has a massive cast iron ring on the outside, my question is, do you know about the new design of the torque converter?

[barbrolidman]

Does anyone on this blog know if the transmission case design is identical between various applications? That is, it would permit any offered gearset/internal components to be installed as a full set peculiar to a desired make/model vehicle application into any empty case.

[Red_Ford]

Anyone have experience with that AT in Fiat 500X. I'm going to buy this car with petrol engine 2.4 Tigershark but opinions about this combination (engine/AT) made me a little bit confused.

[jtizzle]

Hello, I experienced a loud grinding, clunking noise that lasted a couple seconds as I was making a left onto the highway and accelerating; could that be the differential gears grinding? I didn’t feel the transmission slipping or jerking; it felt normal. Thanks I have a Honda passport 9sp

[MidnightM]

Just an FYI, the MDX pictured does not employ this transmission.

[barbrolidman]

Related to my previous question, I am specifically looking at Jeep/Chrysler applications.

[thesmartguy]

Any experience with the P0936-64 on a evoque with the 9HP48 ?

[toolsonabudget]

i just bought a pacifica with 103k miles do u recommend i change the oil in it or just leave it be of course i would use oem mopar but i would not be changing the filter

[garyshay]

Mopar 8 9, Amsoil or Valvoline Max Life full synthetic they're all the same