Auto Trans 6th gear issues - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Protomanx8 · 07-01-2012, 04:58 PM

So I had a cam installed and a stall converter about a month ago now. I recently threw a CEL when I went from reverse to M. Before I could check the code it cleared its self. Now when I am in 6th gear the car will
Not accelerate at all And it shakes the car. Every other gear is good . Any idea to what the problem could be?

pouncer72 · 07-01-2012, 05:32 PM

RPM too low for cam. Dont go into sixth gear until a higher mph.

Protomanx8 · 07-01-2012, 06:02 PM

I'm shifting into 6th gear at around 70. But yeah the RPM issue makes sense.

Protomanx8 · 07-01-2012, 07:47 PM

could you explain why it would only be sixth gear. I can go to low Rpms in 4th and 5th gear i realize 6th is a taller gear.

Bumblebee2012 · 07-01-2012, 07:59 PM

When you say it will not accelerate at all, are you saying your giving throttle and the engine is revving faster and faster yet the trans is not communicating this increased engine speed to the drive shaft? Or, are you saying that your increasing throttle and for some reason the engine remains at a constant speed?

It could be that the stutters in the car are the lock up convertor clutch. You could have low line pressure at low rpm, your in the highest and most resisting gear, and your engine is in a fat torque band that might be pushing through the line pressures ability to hold the convertor clutch in lock.

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Protomanx8 · 07-01-2012, 08:05 PM

Like for instance I'll be in 5th doing 75 which is around 3500 RPM I'll shift into 6TH it'll drop down to around 2000RPM , and then itll roll fine as soon as I try to accelerate it starts to jerk the car, and will not really accelerate.

Bumblebee2012 · 07-01-2012, 08:41 PM

During this jerking, are the RPM's remaining steady, or is the tach bouncing as if the engine's load is being released and then captured again in fast succession?

I'm asking because there are two avenues to consider. One being that the trans is releasing and catching, allowing the engine to bounce up and down in revs. The other is the engine sees a constant load, and something in the trans is getting crossed up. I'm not a trans guru by any means, and I'm not playing one here... But I've built a few of my own transmissions and run into some problems that forced me to learn more than I ever wished to know about the electronic and hydraulic programming. It's painful to diagnose some of these problems.

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Protomanx8 · 07-01-2012, 08:51 PM

the RPMS sit still at right around 2000. and they move very very slowly even when i give it gas

Bumblebee2012 · 07-01-2012, 09:06 PM

You need to get onto a Snap-On scanner or on a dealership scanner to live monitor this thing. If your description is being understood by me, I'm betting that you have two clutches engaged at the same time causing a bind like effect.

You can't really diagnose it accurately without watching each solenoid fire and release. You'll also see converter lock and verify it's holding steady voltage. Get to a dealer or trans shop before you do damage.

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Protomanx8 · 07-03-2012, 02:27 PM

Took it to my tuner , we drove it. He plugged his laptop to the car and he figured out it was a misfire. A falty spark plug caused it all.

Bumblebee2012 · 07-03-2012, 08:48 PM

Wow! A misfire caused that much of a feeling? Radical! Be happy that it's something simple, that is likely the best case scenario you could have found. Im glad it all worked out in your favor.

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2SSRSinBama · 07-04-2012, 12:14 AM

I had a similar issue on a LS1 f-body a few years ago... it too was a misfire... I would have been the guy to come here saying "check your plugs" ONLY because i've been there before, lol... but at least you found the problem quickly, I was scared to drive my car for a month(we only had 4 gears, lol)... my dad ended up being the one who found the issue

Protomanx8 · 07-04-2012, 06:14 AM

Yeah I'm so relieved! Thank you guys for the help! Really appreciate it.

07-01-2012, 04:58 PM	#1
Protomanx8 Drives: 2010 Camaro SS A6 ABM Join Date: May 2011 Location: NOVA Posts: 200	Auto Trans 6th gear issues So I had a cam installed and a stall converter about a month ago now. I recently threw a CEL when I went from reverse to M. Before I could check the code it cleared its self. Now when I am in 6th gear the car will Not accelerate at all And it shakes the car. Every other gear is good . Any idea to what the problem could be?

07-04-2012, 12:14 AM	#12
2SSRSinBama Drives: 2010 2SS/RS Camaro CGM Join Date: Aug 2011 Location: "The Shoals" Alabama Posts: 767	I had a similar issue on a LS1 f-body a few years ago... it too was a misfire... I would have been the guy to come here saying "check your plugs" ONLY because i've been there before, lol... but at least you found the problem quickly, I was scared to drive my car for a month(we only had 4 gears, lol)... my dad ended up being the one who found the issue __________________ 2010 Camaro SS L99... has a few mods

07-01-2012, 05:32 PM	#2
pouncer72 Account Suspended Drives: 2011 Camaro SS Join Date: Apr 2012 Location: Richmond Hill, GA Posts: 365	RPM too low for cam. Dont go into sixth gear until a higher mph.

07-01-2012, 06:02 PM	#3
Protomanx8 Drives: 2010 Camaro SS A6 ABM Join Date: May 2011 Location: NOVA Posts: 200	I'm shifting into 6th gear at around 70. But yeah the RPM issue makes sense.

07-01-2012, 07:47 PM	#4
Protomanx8 Drives: 2010 Camaro SS A6 ABM Join Date: May 2011 Location: NOVA Posts: 200	could you explain why it would only be sixth gear. I can go to low Rpms in 4th and 5th gear i realize 6th is a taller gear.

07-01-2012, 07:59 PM	#5
Bumblebee2012 Drives: 2012 2SS TF3, 1971 Chevelle Join Date: Feb 2012 Location: Pittsburgh, Pa Posts: 840	When you say it will not accelerate at all, are you saying your giving throttle and the engine is revving faster and faster yet the trans is not communicating this increased engine speed to the drive shaft? Or, are you saying that your increasing throttle and for some reason the engine remains at a constant speed? It could be that the stutters in the car are the lock up convertor clutch. You could have low line pressure at low rpm, your in the highest and most resisting gear, and your engine is in a fat torque band that might be pushing through the line pressures ability to hold the convertor clutch in lock. Sent from my Galaxy Nexus using Tapatalk 2

07-01-2012, 08:05 PM	#6
Protomanx8 Drives: 2010 Camaro SS A6 ABM Join Date: May 2011 Location: NOVA Posts: 200	Like for instance I'll be in 5th doing 75 which is around 3500 RPM I'll shift into 6TH it'll drop down to around 2000RPM , and then itll roll fine as soon as I try to accelerate it starts to jerk the car, and will not really accelerate.

07-01-2012, 08:41 PM	#7
Bumblebee2012 Drives: 2012 2SS TF3, 1971 Chevelle Join Date: Feb 2012 Location: Pittsburgh, Pa Posts: 840	During this jerking, are the RPM's remaining steady, or is the tach bouncing as if the engine's load is being released and then captured again in fast succession? I'm asking because there are two avenues to consider. One being that the trans is releasing and catching, allowing the engine to bounce up and down in revs. The other is the engine sees a constant load, and something in the trans is getting crossed up. I'm not a trans guru by any means, and I'm not playing one here... But I've built a few of my own transmissions and run into some problems that forced me to learn more than I ever wished to know about the electronic and hydraulic programming. It's painful to diagnose some of these problems. Sent from my Galaxy Nexus using Tapatalk 2

07-01-2012, 08:51 PM	#8
Protomanx8 Drives: 2010 Camaro SS A6 ABM Join Date: May 2011 Location: NOVA Posts: 200	the RPMS sit still at right around 2000. and they move very very slowly even when i give it gas

07-01-2012, 09:06 PM	#9
Bumblebee2012 Drives: 2012 2SS TF3, 1971 Chevelle Join Date: Feb 2012 Location: Pittsburgh, Pa Posts: 840	You need to get onto a Snap-On scanner or on a dealership scanner to live monitor this thing. If your description is being understood by me, I'm betting that you have two clutches engaged at the same time causing a bind like effect. You can't really diagnose it accurately without watching each solenoid fire and release. You'll also see converter lock and verify it's holding steady voltage. Get to a dealer or trans shop before you do damage. Sent from my Galaxy Nexus using Tapatalk 2

07-03-2012, 02:27 PM	#10
Protomanx8 Drives: 2010 Camaro SS A6 ABM Join Date: May 2011 Location: NOVA Posts: 200	Took it to my tuner , we drove it. He plugged his laptop to the car and he figured out it was a misfire. A falty spark plug caused it all.

07-03-2012, 08:48 PM	#11
Bumblebee2012 Drives: 2012 2SS TF3, 1971 Chevelle Join Date: Feb 2012 Location: Pittsburgh, Pa Posts: 840	Wow! A misfire caused that much of a feeling? Radical! Be happy that it's something simple, that is likely the best case scenario you could have found. Im glad it all worked out in your favor. Sent from my Galaxy Nexus using Tapatalk 2

07-04-2012, 06:14 AM	#13
Protomanx8 Drives: 2010 Camaro SS A6 ABM Join Date: May 2011 Location: NOVA Posts: 200	Yeah I'm so relieved! Thank you guys for the help! Really appreciate it.