L99 Passing Gear Issue? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

GoBlue20 · 08-01-2011, 09:30 PM

I apologize if this is listed somewhere but I couldn't find it. It seems like my SS has been "falling on it's face" lately. It feels like its not downshifting enough when it drops into passing gear. For example, if I floor the car at any speed other than 15 mph... it's only jumping up to 3000-3800 rpm. This seems really low to me. At 15 mph, it hops up to 4500 rpm. At 20 mph though... 3000 rpm. Is this normal? I've done the fuse pull and am running 91 in it. It has been 100+ outside, but in the morning when its cooler I'm still having the same issue. Its 100% stock. Any advice?

nitto85 · 08-01-2011, 10:28 PM

are you driving in D or S mode?

GoBlue20 · 08-01-2011, 10:44 PM

Quote:

Originally Posted by mst504

are you driving in D or S mode?

Typically in D... but I have tested both and it doesn't matter what mode I'm in... I always get the same result

nitto85 · 08-01-2011, 11:13 PM

I've never drove in D much, but I remember my stock SS never really did that.

Did you buy your camaro new or used?

GoBlue20 · 08-01-2011, 11:16 PM

Quote:

Originally Posted by mst504

I've never drove in D much, but I remember my stock SS never really did that.

Did you buy your camaro new or used?

I got it new. It has 3100 miles on it.

nitto85 · 08-01-2011, 11:18 PM

If used I thought maybe someone messed up a transmission tune.

Hmm, sounds like you need to take it to the dealership. They'll probably want to drive it and see if it does it for them.
The key thing is, it has to do it for them in order for them to work on the car under warranty.

sasquash1984 · 08-01-2011, 11:19 PM

tune is the answer stops that hesitation when letting off gas

GoBlue20 · 08-01-2011, 11:21 PM

Quote:

Originally Posted by mst504

If used I thought maybe someone messed up a transmission tune.

Hmm, sounds like you need to take it to the dealership. They'll probably want to drive it and see if it does it for them.
The key thing is, it has to do it for them in order for them to work on the car under warranty.

Its like clockwork.. I might have to do that

GoBlue20 · 08-01-2011, 11:24 PM

Quote:

Originally Posted by sasquash1984

tune is the answer stops that hesitation when letting off gas

I thought a tune may help. It not a hesitation thats the issue though... the car is falling on its face and not downshifting enough IMO. If your L99's didn't downshift and rev up to only 3000-3800ish rpm then that tells me theres an issue. If I keept it floored it will really start to go once it hits 4500 rpm but should be a lot closer to that rpm when it 1st downshifts IMO...

nitto85 · 08-01-2011, 11:30 PM

Edit, nevermind, re-read your first post, your putting premium.

GoBlue20 · 08-01-2011, 11:35 PM

Quote:

Originally Posted by mst504

Edit, nevermind, re-read your first post, your putting premium.

Yes.. 91 is premium here. I go out of my way to get to the gas station that sells it because most of them run 90. Shell, however, has 91.

n116ebo · 08-02-2011, 08:52 AM

I have the SS auto also but do not punch mine enough to help you on your question. I do feel for you on the 90-91 octane. In my home town nearly all stations are posting 91. I know of one fina that has 92 posted, but I also know they are mixing ethanol. I keep thinking tune, but loss of warranty and if you can only find 91 octane. Like they said may have to take to dealer. I have had my 2010 for 16 months and knocking on wood have not had to let the dealership touch mine. Hope you find the answer. Happy motoring.

Patrick G · 08-02-2011, 09:57 AM

If your TCM has been tuned, your tuner may have not altered the part throttle downshift tables. This is where you will see the downshifts to 1st gear up to 30mph.

ABM/IOM · 08-02-2011, 10:07 AM

Quote:

Originally Posted by GoBlue20

I apologize if this is listed somewhere but I couldn't find it. It seems like my SS has been "falling on it's face" lately. It feels like its not downshifting enough when it drops into passing gear. For example, if I floor the car at any speed other than 15 mph... it's only jumping up to 3000-3800 rpm. This seems really low to me. At 15 mph, it hops up to 4500 rpm. At 20 mph though... 3000 rpm. Is this normal? I've done the fuse pull and am running 91 in it. It has been 100+ outside, but in the morning when its cooler I'm still having the same issue. Its 100% stock. Any advice?

I know i saw an article on an independent gasoline study on this site about how many gas stations posting 91 octane were only testing at about 89-90. Check the general discussion topics on here.
If you are putting in 91, you may only really be burning 89 or 90 octane and in that case your ss will run like shit. I live in Florida where we can get 93 on every corner. Superchips has a handheld tuner that has a tune in it for 91 or 93 octane. That's what i use in mine. The transmission tune alone is worth the cash. It will fix that downshifting problem.

08-01-2011, 09:30 PM	#1
GoBlue20 Drives: 2011 Inferno Orange 2SS/RS A6 Join Date: Jun 2011 Location: Warner Robins, GA Posts: 141	L99 Passing Gear Issue? I apologize if this is listed somewhere but I couldn't find it. It seems like my SS has been "falling on it's face" lately. It feels like its not downshifting enough when it drops into passing gear. For example, if I floor the car at any speed other than 15 mph... it's only jumping up to 3000-3800 rpm. This seems really low to me. At 15 mph, it hops up to 4500 rpm. At 20 mph though... 3000 rpm. Is this normal? I've done the fuse pull and am running 91 in it. It has been 100+ outside, but in the morning when its cooler I'm still having the same issue. Its 100% stock. Any advice?

08-01-2011, 11:19 PM	#7
sasquash1984 502 RWHP N/A Drives: The yeti Join Date: May 2009 Location: Saginaw/ Ft Worth TX Posts: 3,085 View My Garage	tune is the answer stops that hesitation when letting off gas __________________ factory motor factory trans, Gpi ss4 cam stock heads ported and milled, full exhaust, circle d 5c 4000 triple disk, 3:91 rear end with posi mod, cai, bmr derlin rear diff bushins, bmr derlin cradle bushins, bmr trailing arms, toe rods with bushings, and bmr anti extreme sway bar. Weld rt-s 17x5 fronts and 17X10 rears on mickey thompson et street r's

08-02-2011, 09:57 AM	#13
Patrick G Drives: 2009 Pontiac G8 GT Join Date: Sep 2009 Location: Victoria, TX Posts: 52	If your TCM has been tuned, your tuner may have not altered the part throttle downshift tables. This is where you will see the downshifts to 1st gear up to 30mph. __________________ 2013 Corvette Grand Sport A6 Forged 416, Greg Good ported TFS 255 LS3 heads, ECS NOVI 1500 blower, 222/242 .629/.604 121LSA EPS cam, ARH 1 7/8" headers, NPP exhaust, 747rwhp/709rwtq on 93 octane, no meth, w/stock street manners. 2014 GMC Yukon XL Denali, Air Raid MIT, tuned. 2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph Texas Mile 2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 Texas Mile LS1,LS2,LS3,LS7 Custom Camshaft Specialist

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08-01-2011, 10:28 PM	#2
nitto85 Caffeine Injected Drives: 13 Ram - 05 Widebody 1050rwhp Vette Join Date: Sep 2010 Location: Woodstock, Ga Posts: 1,033	are you driving in D or S mode?

08-01-2011, 11:13 PM	#4
nitto85 Caffeine Injected Drives: 13 Ram - 05 Widebody 1050rwhp Vette Join Date: Sep 2010 Location: Woodstock, Ga Posts: 1,033	I've never drove in D much, but I remember my stock SS never really did that. Did you buy your camaro new or used?

08-01-2011, 11:18 PM	#6
nitto85 Caffeine Injected Drives: 13 Ram - 05 Widebody 1050rwhp Vette Join Date: Sep 2010 Location: Woodstock, Ga Posts: 1,033	If used I thought maybe someone messed up a transmission tune. Hmm, sounds like you need to take it to the dealership. They'll probably want to drive it and see if it does it for them. The key thing is, it has to do it for them in order for them to work on the car under warranty.

08-01-2011, 11:30 PM	#10
nitto85 Caffeine Injected Drives: 13 Ram - 05 Widebody 1050rwhp Vette Join Date: Sep 2010 Location: Woodstock, Ga Posts: 1,033	Edit, nevermind, re-read your first post, your putting premium.

08-02-2011, 08:52 AM	#12
n116ebo n116 Drives: 2010 2SS YELLOW TRANSFORMER AUTO Join Date: Mar 2010 Location: SAN ANGELO TX Posts: 632 View My Garage	I have the SS auto also but do not punch mine enough to help you on your question. I do feel for you on the 90-91 octane. In my home town nearly all stations are posting 91. I know of one fina that has 92 posted, but I also know they are mixing ethanol. I keep thinking tune, but loss of warranty and if you can only find 91 octane. Like they said may have to take to dealer. I have had my 2010 for 16 months and knocking on wood have not had to let the dealership touch mine. Hope you find the answer. Happy motoring.