Chevrolet Cruze Forums banner
1 - 7 of 7 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter · #1 ·
hey everyone

just purchased a 2011 LTZ Auto with decent mileage 54k.

Im no tuner or into overhauling a DD fuel efficient car. But I'm all for small upgrades to get the most out of the car and increase its longevity.

I am reading after I bought the 2011 yesterday, that the Auto Transmissions can have issues, not just being 'jerky' but going out completely. Mostly it looks like international cruzes if I am not too far off with maybe the GT30 or GT35 and more with the 1.8l

My car has the GT40 transmission if I'm right, and i read that the 2011 jump to 2012 has the same transmission in USA? but it was improved for more reliability if I'm correct.
Iv also read that you cannot put a 2012 trans into a 2011 if my trans does go out on me.

Firstly, if I'm wrong somewhere, and the tranny goes out, can i put in a newer year transmission in? (without complete overhaul since with enough money you can do anything these days)

Second, I plan on changing the tranny fluid immediately with best recommended. For a start. Ill take a look at the car fax again to see if its been changed recently first.
Im also looking into a better tranny cooler. I understand its merged with the radiator? Any recommended brand or size? Keeping it as cool as possible is a good idea for any car, and this is my first automatic car iv had in 11 years of being a driver.

Im no car guy. But any stronger parts I can swap in the tranny itself (would have done by a professional of course)? Just to bolster it as preventive upgrade. If not thats fine.

Outside the transmission. Im just looking to get the best out of this car.
I hear better spark plugs are good idea especially with a tune, but even completely stock I'm seeing some experience knock anyways. regardless of octane.
Doesn't look like better injectors are needed unless you get a tune or have more done to the car. correct me if I'm wrong or efficiency can be improved.

Not looking for more horses, but anything to make run smoother and possibly more efficient.
Perhaps an intake upgrade.

I just want to keep this thing running clean cool and smooth. I owned my 99 civic til it died at 260k, and my milan at 150k til i got t-boned last month -Not injured :)

thank you, I've googled a lot but man its over whelming. If theres a sticky with my needs please post and thanks.
 

·
Administrator
Joined
·
25,596 Posts
Go ahead and replace the transmission fluid with AMSoil ATF fluid. Even if it has been changed you don't know what was put in there. The spark plugs are probably incorrectly gapped - most of the 2011 and 2012s had this issue. Even if they were gapped properly from the factory I discovered that my Cruze doesn't wear out spark plugs evenly.
 

·
Registered
Joined
·
165 Posts
I replaced the stock plugs on mine with iridium when i got the car with 3k miles. The stock plugs were horribly off with the gap. Firstly gapped Iridium plugs made a huge difference in pep and mpg.
 

·
Administrator, Resident Tater Salad
Joined
·
17,486 Posts
If you look around online enough, you can find transmission issues with almost any car out there.

The 6T40 sometimes has issues with clutches (later years). The 2011 transmissions were fairly robust for the most part, but they do shift harshly and fumble around for gears a lot. Programming and ratios were revised for 2012+ Cruzes.

Do a fluid change every 45K, and you should be good. There are aftermarket tunes that will improve shifting behavior a bit if you're so inclined.
 

·
Registered
Joined
·
3 Posts
Discussion Starter · #5 ·
Hey thanks.

Yea just read the plugs can be gapped all over different ranges from factory

Good to hear about transmission.
Makes sense you hear only the bad about it. Not like people go on forums to go. Hey tranny is good for all the people who have no issues. Only hear the complaints.

If the tranny is "robust" for an auto maybe I'll be less shy about a tune. Still gonna get a bigger cooler. Never had an automatic and want a good first experience
 

·
Administrator
2014 LT program car, Pull Me Over Red
Joined
·
12,105 Posts

·
Registered
Joined
·
206 Posts
Hey thanks.

Yea just read the plugs can be gapped all over different ranges from factory

Good to hear about transmission.
Makes sense you hear only the bad about it. Not like people go on forums to go. Hey tranny is good for all the people who have no issues. Only hear the complaints.

If the tranny is "robust" for an auto maybe I'll be less shy about a tune. Still gonna get a bigger cooler. Never had an automatic and want a good first experience
A lesson learned is, get dielectric grease on the spark plug boots sooner than later, so more incentive to check out your plugs. Spark plug boots rip off because they get stuck to the spark plug insulator. To remove, it is recommend to gently rock the coil pack back and forth (the coil pack is 1 complete unit for all 4 plugs). $150 part, and I don't believe any mechanics will pay for the part if it gets damaged, not their fault the boot is stuck to the plug.
 
1 - 7 of 7 Posts
Top