GM CAL for 3.91 gears not installed at dealer? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Briand069 · 01-02-2015, 10:21 AM

Has anyone had 3.91 gears installed not at the dealer but was able to get the GM calibration done at the dealer?

Thanks
Brian

Rhino79 · 01-02-2015, 10:23 AM

Up to your dealer really. They get paid for doing the calibration by GM. But some dealers aren't going to be interested in doing it if they didn't do the work.

Mainly because the dealer isn't going to be able to stand behind someone elses work.

rray · 01-02-2015, 04:07 PM

That's a good question too, because I just talked with Fremont Chevrolet service about pricing for the 3.91 upgrade and they quoted $1750 for the whole deal, yet Rearend Specialties website in Santa Clara shows they can do a ring and pinion upgrade for about $650 parts and labor.

That means that I would just need someone to reflash some code to fix the speedometer reading ratio change for less than $1100. I'm guessing that's only 1 hour work to flash, including the time it takes to connect the cable, go on the internet and look up the values to flash, and type them into a variable page, and press the Update button.

Am I missing something here, or is so expensive because their guys don't know gears and expect several failures and reworks till they get it right??

Synner · 01-02-2015, 07:37 PM

Most dealers will charge you MSRP for every part plus a $140 an hour labor rate. I wouldn't want a dealership to touch my car with very few exceptions. Ask what they would charge purely for the update.

MiSTER · 01-02-2015, 11:43 PM

When I spoke with the service manager at Stewart Chevrolet in Colma, they were fine with me having the gears installed by another shop because he wasn't confident in having them do it since Stewart Chevrolet didn't get a lot of rear gear work. He did say that I'd have to pay the hour labor for the ECU reprogramming.

Rhino79 · 01-03-2015, 07:54 AM

650 for parts and labor is a low. The gm kit is 425 for gear kit alone.

Slowhawk · 01-03-2015, 11:17 AM

I'm guessing the $650 is for regular gears in the older cars.Not 5th gen's.

Pro Stock John · 01-03-2015, 11:18 AM

Per one of my GM contacts they are supposed to release 3.91 gear calibrations that can be done at the dealer but there is no time frame on it.

I think a reasonable way to look at the cost would be

Kit + Labor =

So if the kit is $425, I'd then figure 4-5 hours for labor.

olblue75 · 01-03-2015, 01:55 PM

Theres a chevy dealership in Arkansas that will swap the gears an reflash the BCM for about 1200'ish last time talked to them

Rhino79 · 01-03-2015, 02:14 PM

That would be us. Including lubes and tax.

olblue75 · 01-04-2015, 10:35 AM

Wanting to bring my 10SS to you soon Rhino79 but will have to be a weekend job.

Rhino79 · 01-04-2015, 04:05 PM

Damn long drive from Afghanistan!!

olblue75 · 01-04-2015, 09:46 PM

RIGHT!!!!

olblue75 · 01-04-2015, 09:48 PM

I'm back now!!!

01-02-2015, 10:21 AM	#1
Briand069 Drives: 1997/1969 Camaro's Join Date: Aug 2009 Location: Vacaville, Ca Posts: 98	GM CAL for 3.91 gears not installed at dealer? Has anyone had 3.91 gears installed not at the dealer but was able to get the GM calibration done at the dealer? Thanks Brian __________________ 1969 Camaro LT1 4L60E 2010 Camaro 2SS/RS 6spd

01-02-2015, 04:07 PM	#3
rray Drives: 2013 GAZ 2SS/RS Join Date: Feb 2012 Location: Fremont, CA Posts: 418	That's a good question too, because I just talked with Fremont Chevrolet service about pricing for the 3.91 upgrade and they quoted $1750 for the whole deal, yet Rearend Specialties website in Santa Clara shows they can do a ring and pinion upgrade for about $650 parts and labor. That means that I would just need someone to reflash some code to fix the speedometer reading ratio change for less than $1100. I'm guessing that's only 1 hour work to flash, including the time it takes to connect the cable, go on the internet and look up the values to flash, and type them into a variable page, and press the Update button. Am I missing something here, or is so expensive because their guys don't know gears and expect several failures and reworks till they get it right?? __________________ If you see it, get it, for tomorrow it may be gone!

01-03-2015, 11:18 AM	#8
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	Per one of my GM contacts they are supposed to release 3.91 gear calibrations that can be done at the dealer but there is no time frame on it. I think a reasonable way to look at the cost would be Kit + Labor = So if the kit is $425, I'd then figure 4-5 hours for labor. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

01-02-2015, 10:23 AM	#2
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Up to your dealer really. They get paid for doing the calibration by GM. But some dealers aren't going to be interested in doing it if they didn't do the work. Mainly because the dealer isn't going to be able to stand behind someone elses work.

01-02-2015, 07:37 PM	#4
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,544	Most dealers will charge you MSRP for every part plus a $140 an hour labor rate. I wouldn't want a dealership to touch my car with very few exceptions. Ask what they would charge purely for the update.

01-02-2015, 11:43 PM	#5
MiSTER Drives: 2010 2SS CGM Camaro, 1988 6.6L IROC Join Date: Mar 2010 Location: Bay Area Posts: 157	When I spoke with the service manager at Stewart Chevrolet in Colma, they were fine with me having the gears installed by another shop because he wasn't confident in having them do it since Stewart Chevrolet didn't get a lot of rear gear work. He did say that I'd have to pay the hour labor for the ECU reprogramming.

01-03-2015, 07:54 AM	#6
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	650 for parts and labor is a low. The gm kit is 425 for gear kit alone.

01-03-2015, 11:17 AM	#7
Slowhawk Drives: 1999 Trans Am Join Date: Jul 2009 Location: Bridgewater,Ma Posts: 2,017	I'm guessing the $650 is for regular gears in the older cars.Not 5th gen's.

01-03-2015, 01:55 PM	#9
olblue75 Drives: 2010 2SS/RS Join Date: Dec 2009 Location: Clarksville Tennesse. Posts: 6,064	Theres a chevy dealership in Arkansas that will swap the gears an reflash the BCM for about 1200'ish last time talked to them

01-03-2015, 02:14 PM	#10
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	That would be us. Including lubes and tax.

01-04-2015, 10:35 AM	#11
olblue75 Drives: 2010 2SS/RS Join Date: Dec 2009 Location: Clarksville Tennesse. Posts: 6,064	Wanting to bring my 10SS to you soon Rhino79 but will have to be a weekend job.

01-04-2015, 04:05 PM	#12
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Damn long drive from Afghanistan!!

01-04-2015, 09:46 PM	#13
olblue75 Drives: 2010 2SS/RS Join Date: Dec 2009 Location: Clarksville Tennesse. Posts: 6,064	RIGHT!!!!

01-04-2015, 09:48 PM	#14
olblue75 Drives: 2010 2SS/RS Join Date: Dec 2009 Location: Clarksville Tennesse. Posts: 6,064	I'm back now!!!