what does AFM sound like

[klatterblast]

Originally Posted by n116ebo

I think I read somewhere if you run the auto l99 trans in sport mode the AFM does not come into play, stays with all 8 cylinders cranking at all speeds. Of course I may not know what I am talking about. I like the idea of saving some fuel when you are just cruising.

dod or(afm) still works in sport mode till you hit tap shift then dod wont come on.

[Mike's LazruSS]

A GM person who should know told me emphatically that AFM DOES work in sport mode. Using the tap shift helps only if there is enough load (I think based on fuel flow) to keep it out of the picture. You can "learn" how to drive to keep it off most of the time, but what a pain. I experimented a lot with tap shift, and believe the GM guy was exactly right. You have to select a gear and be on the gas pretty hard to keep AFM off. Pretty hard to do in the afternoon stop-and-go commute.

[brantley847]

Originally Posted by Mike's LazruSS

A GM person who should know told me emphatically that AFM DOES work in sport mode. Using the tap shift helps only if there is enough load (I think based on fuel flow) to keep it out of the picture. You can "learn" how to drive to keep it off most of the time, but what a pain. I experimented a lot with tap shift, and believe the GM guy was exactly right. You have to select a gear and be on the gas pretty hard to keep AFM off. Pretty hard to do in the afternoon stop-and-go commute.

I was under the impression AFM was utilized at more of a cruising / highway situation...not stop and go? Are you telling me I am giong to have to hear this throughout the city...now that would be frustrating

[Mike's LazruSS]

Yup. My greatest frustration point was a four-lane highway that, in commute time was a 35 or 45 mph stretch with lots of traffic lights and speed-up-slow-down. The noise and surge of AFM kicking in and out drove me nuts. Tap shift to keep the revs up helped, but when traffic slowed down enough, it kicked in. I have heard that altitude and temperature affect the perception of the AFM, but cannot verfy that.

[brantley847]

Originally Posted by Mike's LazruSS

Yup. My greatest frustration point was a four-lane highway that, in commute time was a 35 or 45 mph stretch with lots of traffic lights and speed-up-slow-down. The noise and surge of AFM kicking in and out drove me nuts. Tap shift to keep the revs up helped, but when traffic slowed down enough, it kicked in. I have heard that altitude and temperature affect the perception of the AFM, but cannot verfy that.

Ridiculous...I was under the impression it was utilized mostly when on the interstate at speeds of 50+ where you maintained those RPMS.

Not from red light to red light in the city...that is going to suck for me.

[topgun1]

yep, it is ridiculous, people hate it. sounds like a fart can and comes on when you don't want it to. should also have been an OPTION, not a standard feature for the automatic, for the people that only cared about gas mileage and daily transportation not for V8 power lovers.

[Revo1]

Alright guys, the consensus is that IT SUCKS and it needs to be tuned out. About how much $ to get rid of it?

[2010 Bumblebee]

Originally Posted by Mike's LazruSS

A GM person who should know told me emphatically that AFM DOES work in sport mode. Using the tap shift helps only if there is enough load (I think based on fuel flow) to keep it out of the picture. You can "learn" how to drive to keep it off most of the time, but what a pain. I experimented a lot with tap shift, and believe the GM guy was exactly right. You have to select a gear and be on the gas pretty hard to keep AFM off. Pretty hard to do in the afternoon stop-and-go commute.

Originally Posted by Revo1

Alright guys, the consensus is that IT SUCKS and it needs to be tuned out. About how much $ to get rid of it?

It works anytime below 3000 RPMs under light load sport mode or not. What people are doing is using tap shift to go down one gear to get the thing to kick out, but after a while you get tired of doing that and just accept it. It's really no big deal after owning the car for a little while. I don't mind it anymore at all.

[5thGenOwner]

Originally Posted by brantley847

I am ordering the L99 and really want the ATAK or S type exhaust....drone doesn't concern me, but AFM does.

The sound at cruising isn't a huge issue for me as I do most of my driving around town and don't often get to cruise above 60mph.

Is the irritation something that can be controlled by going with an axle back / stock resonators?

Your driving sounds much like mine... mostly city with rarely cruising above 60mph.

I have CAI intake & GMPP axle-back exhaust (sounds exactly how I wanted), and AFM isn't an issue at all. And even if it was, I could manually keep it off... just by driving aggressively (higher rpms) in [M]. So yes, it can be controlled without getting a tune, even for a full exhaust (although if you get headers, you should get a tune).

[SSIN]

This is the first automatic I have ever owned. I have had M6 in C5 Vette,Mustang and Porsche and I am completely happy with this car and the Automatic. The AFM is not a big deal you can cruise in D or put it in sport or shift in M with the tap shift. Most people adding there 2 cents are the M6 guys who are anti automatic. Same guys that think the color they got is the best. Get what you want. Test drive it first and make the right choice for you.

[blackknight]

Can a dealer tell if you car has been custom tuned? lets say i wanted to just get AFM tuned out. Would they be able to tell?

[5thGenOwner]

Originally Posted by blackknight

Can a dealer tell if you car has been custom tuned? lets say i wanted to just get AFM tuned out. Would they be able to tell?

With the correct equipment, and tests... I believe they can see if and when it has been changed. So the simple answer is Yes, even if you revert back to the stock settings.

If your dealer will use that equipment, and run those tests... is another question entirely.

[blackknight]

hmmm. i even opted for an extra 600 bucks for two more years on my bumper to bumper...so i have 5 years/50,000 miles of full warranty coverage....i am starting to get the mod bug though....

[MyIBMssRS]

Originally Posted by SSIN

This is the first automatic I have ever owned. I have had M6 in C5 Vette,Mustang and Porsche and I am completely happy with this car and the Automatic. The AFM is not a big deal you can cruise in D or put it in sport or shift in M with the tap shift. Most people adding there 2 cents are the M6 guys who are anti automatic. Same guys that think the color they got is the best. Get what you want. Test drive it first and make the right choice for you.

Completely agree. People make a big deal out of nothing.