The 3.0 litre diesels were fitted with the infamous GM transmission. This changed to the ZF 6HP26X unit when the engine was replaced with the 3.6 TDV8 for 2007MY. All 5-speed transmission cars had the NV225 transfer box. This was replaced with the Magna Steyr DD295 unit when the 6-speed...

I don't know if there's anything in this video that might help : By the way, you have a GM 5L40-E transmission and a New Venture Gear NV225 transfer case. Phil

Totally agree. If it turned out to be an issue with, say, your inhibitor switch (= fault code P0705) the replacement transmission probably wouldn’t have a switch on it anyway and you’d be expected to use your old one. If you’re thinking you’ll be keeping the vehicle for a while it might be...

A common problem with the 5HP24 transmission, particularly in the L322, results in an issue with the A clutch. As the A clutch is used in gears 1, 2, 3 & 4 the transmission consequently fails safe into 5th. However, as your transmission fails safe into 4th (A & B clutches applied) – which is the...

How certain are you that your transmission is failing safe to 4th gear rather than to 5th? This is very significant. Phil

Yes, the majority of the flow from the pump goes through the torque converter, which flushes the debris out into the fluid. Once the friction material has completely worn off the LUC friction plate, the steel backing plate then begins to wear, depositing metallic debris into the fluid...

Typical conditions for shuddering (due to wear of the torque converter lock-up clutch friction plate) are at light throttle openings on a slight incline. This is because the LUC is operating in its ‘continuous slip’ mode, to minimise the transmission of torsional vibration through the driveline...

As Saint.V8 has already stated, the ZF transmissions are very straightforward to strip & rebuild. The hard bit is getting the damn thing out of the vehicle & back in again afterwards. Worth having a glance through the Repair Manual to see what you think ...

From '07-'12MY the front driveshafts are the same i.e. RH = IED500110, LH = IED500120. Similarly, the rear driveshafts are the same i.e. RH = TOB500310, LH = TOB500320. Phil

Just to highlight the OP has a 2006 model with the ZF 6HP26X transmission. The design of the front propshaft had been changed by that stage to include the front joint, so the Q041 Service Action isn’t applicable to this vehicle. If you hear the park pawl ratcheting on the park lock wheel when...

It could just be a solenoid or valve body issue. I would certainly want to rule this out before moving onto more involved running gear issues e.g. reverse clutch or low & reverse clutch faults. Dexron III (now VI) is the correct fluid for the GM 5L40-E transmission. For the TD6 : “When the...

This is the procedure outlined in RAVE for the original splined drive tube design: Although the ‘usual’ method would be to simply mark the nut and shaft when you remove the pinion flange, and then retighten to the same position following replacement of the seal, there’s a high risk that by...

What happens if you select Manual mode when stationary and then manually upshift through the gears as you accelerate? Phil

As the DTC seems to be wheel speed sensor related, and because you're losing drive, I think it would be worth checking your driveshafts Phil

If the drivetrain downstream of the transmission output shaft is disconnected from the wheels somewhere down the line (transfer box, propshafts, final drives or driveshafts), when the shift lever is moved back to the Park position the output shaft is still turning and this causes the park lock...

So this is the exact same issue that you had with the previous transmission installed? Clearly we’re still trying to establish if it’s a transmission fault or something else in the driveline like the transfer box. As long as you aren’t trying to tow anything or need to climb any steep hills I...

So what’s the current situation? Does the failsafe message reset so that when you next start the engine there’s no failsafe message displayed? What happens when you select Drive? Does the car set off in 1st gear and upshift through any gears or does the failsafe message immediately appear and...

Presumably your car has the uprated front propshaft mod. from the Q041 Service Action? I suggest you get the suspension on the highest setting and ask someone to look under the vehicle to see if either propshaft is turning when you’re stationary in Drive. Phil

Could be a seized cable clamp bolt in the selector lever: auto box issues - help please! Phil

Have you removed the plenum chamber? Phil