Hurst2001 , to answer your question I choose Mobil synthetic but Castrol, and Valvoline have similar fluids.

 

Is there a filter to change?

 

Yes, there is a filter.

 

DexRon VI specification is a Synthetic.

 

I just purchased a "transmission filter kit" from Advance for around $20. It's got a filter and a pan gasket.

My estimation of re using an after market gasket has changed, that thing is thin with no ribs or metal inner lining. I will probably re use the OE gasket.

I did re use the OE gasket. The 2011 had 2 donut magnets on the pan instead of the 1 square magnet on my 2008. I noticed a fair asmount of gray sludge in the pan, comments? The ATF was still "red-ish" after 96,000 miles, but closer to black.

I do notice a difference in shifting, but that may be because I put almost a quart more in than came out. I have added a ATF cooler since I got the car, and seems to have a small leak on the R side axle seal.

 

Where can I find instructions on changing transmission fluid in the 5-speed manual HHR 2.0L
Turbo?

 

Why would you replace it?

Simply put: drain it, refill it.

Assuming you have the GETRAG , close to the same on MU3

drain the bottom hole. fill at the top hole. Big arrow toward front of CAR.

 

Coming up on 180K miles, with unknown history, I guess I should change the trans fluid. There's a local shop with a special for $109.

 

You can change it yourself, you get what you pay for!

 

The correct fluid (Dexron VI) is going to cost around $40 a gallon, you need 7 quarts. If you have a shop do it be sure they use Dexron VI, that is full synthetic several different brands make it.