Lost 4-6 gear need advice - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

WeflyhereSS · 07-07-2019, 07:41 AM

So Lil back story car is 12 auto 6l80 no stall ECS supercharger cam etc, stock trans (tuned) got on highway proceed to fast lane speed up some have it like 3/4 throttle, a second later gave it gas again shifter 2-3 then when it went to 4 it just reved, 😥🗣🥴 eventually I pulled over still had 1-3 but got codes p0700 and p0796 , I have two ideas of attack , the first being the tcm replaced, part alone is like 600, but then another path is the 4-5-6 drum is cracked , and at the moment like 2k to pull the trans and have it repaired etc,

So I’d just like to hear some
Ideas or diagnosis from you guys
Trying to figure which way to spend

SSBUSDRVR · 07-07-2019, 08:02 AM

Sounds like your Power may killed it. Maybe better to shell out the $ and get a beefed up Tranny? ( Sorry Good at spending other people’s $

lol ) Best Wishes in getting back up and running.

christianchevell · 07-07-2019, 08:35 AM

With the increased heat generated from building a engine and supercharging you should have done something to improve the transmission and suspension IMO, let alone not knowing what maintenance you have performed on the transmission over time as automatics due need fluid flushes and filter changes you may indeed want to buy a more beefed up transmission and install aftermarket fluid in it next time yet money talks...

You must be using the paddle shifter which I mostly ignored when I had a l99.... Good Luck.. no great insight here maybe someone else who lost gears can help... I know the old 350 trannies and such could only take a rebuild so long and they were shift kitted and had convertors and handling just 450 hp was hard on them.

Moto-Mojo · 07-07-2019, 09:11 AM

I can tell you that when my torque converter clutch went out, it made all the shifts happen at MUCH higher rpms and road speeds. It seemed like I would have had to be going 90mph+ before it ever got into 5th and 6th. With all your power the TCC could have let go. When that happens it whacks the computer.

Does it downshift early too? As if using the tranny to brake? Mine did.

WeflyhereSS · 07-07-2019, 10:00 AM

Thanks guys I’m all ears no opinions are unwanted in reading it all

WeflyhereSS · 07-07-2019, 10:01 AM

Well it shifts fine 1-3 still nothing weird untill I got to 4 and then it was like neutral just reved, got it back home only using 1-4 and it drove absolutely fine

Greenhornet2 · 07-07-2019, 10:50 AM

Not likely a tcm in my opinion. Time to pull it out and have a look. If you can pull the pan and find lots of glitter.. pull it out she will likely need surgery.

CamaroDreams76 · 07-07-2019, 11:20 AM

power level?

WeflyhereSS · 07-07-2019, 11:47 AM

About 700

WeflyhereSS · 07-07-2019, 11:48 AM

More than likely just gonna rebuild it with Preformance parts but just wanna heat opinions

CamaroDreams76 · 07-07-2019, 06:24 PM

6L80s are at their limit in that neighborhood of power. Honestly not a surprise. Friend of mine had his car built by FSP back in the day. It has LTs, LS3 conversion, custom grind cam, ECS kit, suspension work, 3:91 gears, ZL1 pump and put down 640ish wheel. His stock 6L80 went in less than 2 weeks.

I also heard that the 6L80s are difficult to tune and a bad tune can destroy the entire trans because of it.

Most go with a built 4L60 or TH400.

hammdo · 07-07-2019, 08:36 PM

GPI rebuild mine. I’m over 800 RWHP and RWTQ.

my trans was holding up but developed a 4-5 flare during upshift. When they took it apart, found some ‘heating’ in the 456 pack. Nothing cracked. Tear down will probably confirm the 456 hub assembly or shaft cracked. Billet upgrades will help (I did those).

I have a deep pan, a BIG trans cooler as heat is a big enemy of the transmission (besides a bad tune), the SUV trans filter for more flow, TCI flex plate , and a 6L90 torque Converter from a ZL1.

Mine was rebuilt for road course work, very happy I did not wait...

-Don

WeflyhereSS · 07-08-2019, 05:39 AM

That’s dope yea gonna need a rebuild definitely doing the billet 456 hub appreciate all those comments

WeflyhereSS · 07-08-2019, 11:22 AM

Any one know of any good spots in the north east ?

07-07-2019, 07:41 AM	#1
WeflyhereSS Drives: 2012 Black on Black Camaro 2ss Join Date: Dec 2015 Location: CT Posts: 884 View My Garage	Lost 4-6 gear need advice So Lil back story car is 12 auto 6l80 no stall ECS supercharger cam etc, stock trans (tuned) got on highway proceed to fast lane speed up some have it like 3/4 throttle, a second later gave it gas again shifter 2-3 then when it went to 4 it just reved, 😥🗣🥴 eventually I pulled over still had 1-3 but got codes p0700 and p0796 , I have two ideas of attack , the first being the tcm replaced, part alone is like 600, but then another path is the 4-5-6 drum is cracked , and at the moment like 2k to pull the trans and have it repaired etc, So I’d just like to hear some Ideas or diagnosis from you guys Trying to figure which way to spend __________________ "How do u keep it under the speed limit? YOU CANT HAHAHAHA"

07-07-2019, 08:02 AM	#2
SSBUSDRVR Drives: '11 2SS/RS IBM/BLK M6 Join Date: Mar 2011 Location: Central FL Posts: 3,748 View My Garage	Sounds like your Power may killed it. Maybe better to shell out the $ and get a beefed up Tranny? ( Sorry Good at spending other people’s $ lol ) Best Wishes in getting back up and running. __________________ '11 IBM 2SS/RS Built and Tuned by Vengeance Racing Vengeance PCM Vengeance Racing Mast Black Label LS7 Headed 416 ProCharger Stage II D1X Race ,Monster Triple,Alky Control Meth Inj, Forgestar F14 Drag Version and a bunch of other blah blah blah.838/688 at 12lbs Street Friendly

07-07-2019, 08:35 AM	#3
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,587 View My Garage	With the increased heat generated from building a engine and supercharging you should have done something to improve the transmission and suspension IMO, let alone not knowing what maintenance you have performed on the transmission over time as automatics due need fluid flushes and filter changes you may indeed want to buy a more beefed up transmission and install aftermarket fluid in it next time yet money talks... You must be using the paddle shifter which I mostly ignored when I had a l99.... Good Luck.. no great insight here maybe someone else who lost gears can help... I know the old 350 trannies and such could only take a rebuild so long and they were shift kitted and had convertors and handling just 450 hp was hard on them. __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

07-07-2019, 09:11 AM	#4
Moto-Mojo Fast Cars and Old Guitars Drives: 2015 2SS RS (L99, baby!) Join Date: Apr 2012 Location: N. CA Posts: 3,974	I can tell you that when my torque converter clutch went out, it made all the shifts happen at MUCH higher rpms and road speeds. It seemed like I would have had to be going 90mph+ before it ever got into 5th and 6th. With all your power the TCC could have let go. When that happens it whacks the computer. Does it downshift early too? As if using the tranny to brake? Mine did. __________________ “I don’t want to belong to any club that would have me as a member.” - Groucho Marx

07-07-2019, 10:00 AM	#5
WeflyhereSS Drives: 2012 Black on Black Camaro 2ss Join Date: Dec 2015 Location: CT Posts: 884 View My Garage	Thanks guys I’m all ears no opinions are unwanted in reading it all __________________ "How do u keep it under the speed limit? YOU CANT HAHAHAHA"

07-07-2019, 10:01 AM	#6
WeflyhereSS Drives: 2012 Black on Black Camaro 2ss Join Date: Dec 2015 Location: CT Posts: 884 View My Garage	Well it shifts fine 1-3 still nothing weird untill I got to 4 and then it was like neutral just reved, got it back home only using 1-4 and it drove absolutely fine __________________ "How do u keep it under the speed limit? YOU CANT HAHAHAHA"

07-07-2019, 10:50 AM	#7
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	Not likely a tcm in my opinion. Time to pull it out and have a look. If you can pull the pan and find lots of glitter.. pull it out she will likely need surgery. __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

07-07-2019, 11:20 AM	#8
CamaroDreams76 Tri-County Camaro SWFL Drives: 2013 IOM 2SS/RS/1LE Join Date: Apr 2013 Location: South West FL Posts: 3,083 View My Garage	power level? __________________ Just bolt ons........ https://www.camaro5.com/forums/showthread.php?t=343023

07-07-2019, 11:47 AM	#9
WeflyhereSS Drives: 2012 Black on Black Camaro 2ss Join Date: Dec 2015 Location: CT Posts: 884 View My Garage	About 700 __________________ "How do u keep it under the speed limit? YOU CANT HAHAHAHA"

07-07-2019, 11:48 AM	#10
WeflyhereSS Drives: 2012 Black on Black Camaro 2ss Join Date: Dec 2015 Location: CT Posts: 884 View My Garage	More than likely just gonna rebuild it with Preformance parts but just wanna heat opinions __________________ "How do u keep it under the speed limit? YOU CANT HAHAHAHA"

07-07-2019, 06:24 PM	#11
CamaroDreams76 Tri-County Camaro SWFL Drives: 2013 IOM 2SS/RS/1LE Join Date: Apr 2013 Location: South West FL Posts: 3,083 View My Garage	6L80s are at their limit in that neighborhood of power. Honestly not a surprise. Friend of mine had his car built by FSP back in the day. It has LTs, LS3 conversion, custom grind cam, ECS kit, suspension work, 3:91 gears, ZL1 pump and put down 640ish wheel. His stock 6L80 went in less than 2 weeks. I also heard that the 6L80s are difficult to tune and a bad tune can destroy the entire trans because of it. Most go with a built 4L60 or TH400. __________________ Just bolt ons........ https://www.camaro5.com/forums/showthread.php?t=343023

07-07-2019, 08:36 PM	#12
hammdo 'It's an experiment' Drives: [COTW 2/09/15] '11 GPI LSA SC Z/LE Join Date: May 2014 Location: Dallas TX Posts: 8,694 View My Garage	GPI rebuild mine. I’m over 800 RWHP and RWTQ. my trans was holding up but developed a 4-5 flare during upshift. When they took it apart, found some ‘heating’ in the 456 pack. Nothing cracked. Tear down will probably confirm the 456 hub assembly or shaft cracked. Billet upgrades will help (I did those). I have a deep pan, a BIG trans cooler as heat is a big enemy of the transmission (besides a bad tune), the SUV trans filter for more flow, TCI flex plate , and a 6L90 torque Converter from a ZL1. Mine was rebuilt for road course work, very happy I did not wait... -Don __________________ 747 RWHP 794 RWTQ "Horsepower sells cars, torque wins races." - Enzo Ferrari See My Build: http://www.camaro5.com/forums/showthread.php?t=385577 Last edited by hammdo; 07-07-2019 at 08:48 PM.

07-08-2019, 05:39 AM	#13
WeflyhereSS Drives: 2012 Black on Black Camaro 2ss Join Date: Dec 2015 Location: CT Posts: 884 View My Garage	That’s dope yea gonna need a rebuild definitely doing the billet 456 hub appreciate all those comments __________________ "How do u keep it under the speed limit? YOU CANT HAHAHAHA"

07-08-2019, 11:22 AM	#14
WeflyhereSS Drives: 2012 Black on Black Camaro 2ss Join Date: Dec 2015 Location: CT Posts: 884 View My Garage	Any one know of any good spots in the north east ? __________________ "How do u keep it under the speed limit? YOU CANT HAHAHAHA"