Some questions

[K32 Camaro]

Originally Posted by SlingShot

Does it feel better running in sport mode ? When it's in Drive, the trans starts in 2nd. When it's in Sport it starts in 1st gear and should feel much better.

I'm pretty sure this theory is false and disproven by many many shops.

Originally Posted by San2cci

I always drive in sport mode; it still occurs often...usually around 28-32mph but it does happen around other MPH.

Is it true that the car skips 3rd gear and goes from 2nd to 4th also?

I think you're talking about skip-shift which is a feature for the manual cars.

You're experiencing the time it takes to come out of 4 cyl mode and then down shifting to a managable gear for the car to speed back up. AKA crapy factory tranny tune mixed with afm..

[cam62]

Originally Posted by K32 Camaro

I'm pretty sure this theory is false and disproven by many many shops.



I think you're talking about skip-shift which is a feature for the manual cars.

Agreed

Originally Posted by K32 Camaro

You're experiencing the time it takes to come out of 4 cyl mode and then down shifting to a managable gear for the car to speed back up. AKA crapy factory tranny tune mixed with afm..

Not sure I agree with this. AFM has been debated here ad nauseum and I don't think we still have a good answer from GM or anyone.

The reason I question this is because to the best of my knowledge from everything I've read here and elsewhere is that AFM is NOT on in manual mode using the tap shift. There's a lot of debate about whether it is actually on in sport mode also, but this isn't an AFM thread.

What I CAN say, is that even when in manual mode, using the tapshifters, if I let the RPM's in any gear other than first (most commonly in 3rd) and the rpm's drop below approx 2k, then lightly giving it some gas it does the bog down thing the OP is talking about until the rpm's go above approx 2k.

[Sky]

Can't say too much for your questions but, WELCOME!

[camarorange]

Are you sure you are not just experiencing the lag in the drive by wire system and the time it takes to downshift from whatever gear you are in?

[cam62]

Originally Posted by camarorange

Are you sure you are not just experiencing the lag in the drive by wire system and the time it takes to downshift from whatever gear you are in?

speaking for myself. Yes. In manual mode using the paddle shifters there is no downshifting. It will stay in the gear selected until manually changed. (exception - when decelerating and the rpm's get to low it will downshift to keep from bogging down).

[camarorange]

Hmmm interesting. Maybe it is because this is the only real performance car I have ever driven (Im 18) but I didn't notice that it bogs down

[camarorange]

On second thought I think I know what the OP is talking about. It only ever happened to me while I was driving in D so I always just attributed it to the fact that the tremec transmissions really are not the greatest.

[cam62]

Originally Posted by camarorange

Hmmm interesting. Maybe it is because this is the only real performance car I have ever driven (Im 18) but I didn't notice that it bogs down

hehe.. when I was 18 I didn't know you could drive a performance car with a light touch either

[camarorange]

Originally Posted by cam62

hehe.. when I was 18 I didn't know you could drive a performance car with a light touch either

Hahaha you gotta pull away from the house first ya know?

[K32 Camaro]

Originally Posted by cam62

Not sure I agree with this. AFM has been debated here ad nauseum and I don't think we still have a good answer from GM or anyone.

The reason I question this is because to the best of my knowledge from everything I've read here and elsewhere is that AFM is NOT on in manual mode using the tap shift. There's a lot of debate about whether it is actually on in sport mode also, but this isn't an AFM thread.

What I CAN say, is that even when in manual mode, using the tapshifters, if I let the RPM's in any gear other than first (most commonly in 3rd) and the rpm's drop below approx 2k, then lightly giving it some gas it does the bog down thing the OP is talking about until the rpm's go above approx 2k.

Did you make sure that you changed gears first? Just entering tapshift is not enough to disengage afm, you must actually change the gear that you were currently in to disable it. In sport mode afm is still active btw.

If you get a tranny tune and get rid of afm as well, this lag w/o a doubt goes away.

[cam62]

Originally Posted by K32 Camaro

Did you make sure that you changed gears first? Just entering tapshift is not enough to disengage afm,

Yes. Tried all sorts of combinations

Originally Posted by K32 Camaro

If you get a tranny tune and get rid of afm as well, this lag w/o a doubt goes away.

Yes I am sure of this. Not ready to void my powertain warranty yet.

[San2cci]

The chevy dealer service advisor told me that the AFM and gear skipping/lagging goes away but only if you have 40%+ throttle...anything under that, the AFM is still active.


What I do know is this really isn't the best idea GM has had. If I wanted better fuel economy I would have bought a 2LT. I guess next time I'll get a stick

[oldfriend]

Originally Posted by San2cci

@ K32 Camaro

I do have a cold air intake; and it didn't really help much...I'll do a ported throttle body just for the hell of it though see if it helps. I didn't know a tune voids the power train warranty, that sucks!!

Try to duplicate that when in S ( sport drive ) and see what happen .

[San2cci]

Duplicate what?