Hey I have a '10 R56 with auto 6 speed trans with just at 79,000 miles, it has started shifting funny, around sharp corners at low speeds it almost slips is the best I can describe, revs up slightly then grabs 1st or 2nd gear depending on speed. It only happens at lower speeds around 15-40, higher speeds no issues. any ideas?

 

It needs a clutch.

 

its automatic....MCS with 6 speed auto paddle shifters all that jazz.....

 

Try changing the transmission fluid, it is far from "Lifetime fluid" and is the cheapest thing you could do, the next step would be a new valve body.

 

Change the fluid and give the new fluid a month or so to clean out the valve body. If that does not solve the shifting issues consider a second change before committing to changing the valve body.


Changing the ATF fluid change is not a particularly hard DIY task, I believe you'll find "how-to's" on NAM and on Pelican's site. Given the miles, drop the trans pan for a complete cleanout, at 79K there will be considerable muck to remove.


You'll need an ATF fluid that meets JWS 3309. There are many on the market from Liqui-Moly, SWEPCO and Valvoline to name a few.




Tip: Pump the new fluid up into the pan drain, it is far easier than trying to use the intended fill port.

 

thanks DneprDave and thefarside for the advice, this will be Saturdays fun....I will update the post after I change the fluid.

 

I know This is an old thread, but I’m having the same problem. The car sat for 2 years and put a new motor in. Not sure if it slipped before.

Assuming it didn't, is there anything else that can be added to safely clean the valve bodies.

Thanks,
Tim