Chet3215

So here is my issue. My 2011 Evo X Mr has no drive in any gear position. I was accelerating away from a stop light and I heard a "bang" and than I lost all drive in forward and reverse gears. There where no dash lights or warning messages displayed when this happened. So far I've scanned for codes and inspected the drivetrain and I do not have any broken axles or prop shafts and there are no fault codes set. I believe the differentials and transfers case is good. I can actuate them with a scan tool and all the wheels turn together. I have no unusually noises if the car is running and in a drive gear from inside the transmission case. When in park the parking pawl does not hold the car. The car can be rolled either direction with the shifter in the park position. If I put the car into drive with the engine running and then attempt to put the car back into park without first shutting the engine off you can hear a noise that I am certain is the parking pawl attempting to lock up to a rotating shaft. The scan tool I have gives some data on the transmission which Is telling me both clutches have approximately 450 mbar of pressure with the engine running at idle and in park. If I raise the rpms my pressure numbers climb on the clutch that is consistent with the gear position I'm in, even or odd gear selected, I also see input shaft speed changes when I select a gear. However I get a change in both input shaft speed sensor values when I do this, for even and odd shafts, the numbers are not the same but it appears when in either manual 1st gear position or drive and manual 2nd gear position both input shaft speed sensors are reading movement. So I was hoping that someone hear with more knowledge of the SST transmission might be able to tell me what I'm looking at here. Could this still be a clutch failure or is it more likely that I broke something in the final drive or output shaft? Any help is greatly appreciated. Thanks.

LetsGetThisDone

iTrader: (1)

Sounds busted. Trans will need to come out and come apart for inspection. No reason to guess at what broke, it needs to come apart regardless. I recommend sending it to Kozmic Motorsports.

Chet3215

Thanks for the reply, So I now have a diagnosis on what happened to my drivetrain. On recommendation of Eric from Kosmic Motorsports I pulled the transfer case and just as he predicted the output shaft from my trans and the input shaft of my transfer case had completely stripped out. All the teeth had completely been destroyed. I'm not even making a lot of power so it's kind of a sad failure. I was expecting the clutch to go any time. I'm over 120k so I figured it's just a mater of time. So in recap if you loose drive, the car can be rolled while in park, (SST), and you have no code faults than this might have happened to you too.