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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 03-10-2015, 02:05 PM   #1
bionick
 
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3.91 gear install questions

Ok so I have an SS manual transmission.
I was told that I do not need to change out the rear diff and I can just buy the GM 3.91 ring and pinion kit. I am going to have a shop do the install as im clueless with gears lol.

My question is is there anything else I need to get/ upgrade? Axles or anything? Or will I be good to go with just the gear kit?

Thanks
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1LE 3.91 differential, Stainless Works/Stainless Power 1 7/8 Catless long tubes, Stainless works Retro Chambered 3" catback, Roto-fab CAI, VMAX CNC ported TB, Vitesse Throttle Controller, elite catch can, 1LE PCV seperator, foose 20" wheels, matte black dipped, hotchkis strut tower brace, oracle red halo's, under dash lights, sunroof, interior accent package, metra stereo dash kit with kenwood double din.
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Old 03-10-2015, 02:33 PM   #2
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Just had mine done today, a6 3.27 to 3.91. From what ive read on this fourm a6 has 3.27 and m6 has 3.45. I'm not adding anything else with these gears. Some say 1le axles would be beneficial to this mod.
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Old 03-10-2015, 02:39 PM   #3
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How much did it run you if you don't mind me asking?
A local shop quoted me 1500 to install the GM 3.91 kit with new shims and bearings all OEM parts covered for two years.
Is that fair price range?
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Old 03-10-2015, 02:53 PM   #4
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Damn that's expensive. I got a shop lined up to do mine for like $700 & parts
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Old 03-10-2015, 02:55 PM   #5
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Disregard my prev post. It was $700 with the parts.
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Old 03-10-2015, 03:01 PM   #6
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Might want to find out where James had his done. Just the kit alone was 455.00 from dealer.
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Old 03-10-2015, 03:19 PM   #7
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Does this include bearings and everything? Because they want like 740 for labor,
330 for ring and pinion, I think 200 for bearings, maybe 100 for shims and then like 40 for oil. Plus tax
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2010 2SS/RS: 414RWHP
1LE 3.91 differential, Stainless Works/Stainless Power 1 7/8 Catless long tubes, Stainless works Retro Chambered 3" catback, Roto-fab CAI, VMAX CNC ported TB, Vitesse Throttle Controller, elite catch can, 1LE PCV seperator, foose 20" wheels, matte black dipped, hotchkis strut tower brace, oracle red halo's, under dash lights, sunroof, interior accent package, metra stereo dash kit with kenwood double din.
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Old 03-10-2015, 03:20 PM   #8
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Quote:
Originally Posted by jamesfg49 View Post
Disregard my prev post. It was $700 with the parts.
James I see you are in AZ as well.
Where did you go? Please tell me everything they did and all the parts used.

Thanks!
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2010 2SS/RS: 414RWHP
1LE 3.91 differential, Stainless Works/Stainless Power 1 7/8 Catless long tubes, Stainless works Retro Chambered 3" catback, Roto-fab CAI, VMAX CNC ported TB, Vitesse Throttle Controller, elite catch can, 1LE PCV seperator, foose 20" wheels, matte black dipped, hotchkis strut tower brace, oracle red halo's, under dash lights, sunroof, interior accent package, metra stereo dash kit with kenwood double din.
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Old 03-10-2015, 04:23 PM   #9
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720.00 for labor
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Old 03-10-2015, 05:24 PM   #10
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Originally Posted by ccb1975 View Post
720.00 for labor
This may be a dumb question but do I need the posi mod in order to burnout both tires when switching to 3.91? Only reason I am asking is because JDP motorsports offeres it in their kit
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2010 2SS/RS: 414RWHP
1LE 3.91 differential, Stainless Works/Stainless Power 1 7/8 Catless long tubes, Stainless works Retro Chambered 3" catback, Roto-fab CAI, VMAX CNC ported TB, Vitesse Throttle Controller, elite catch can, 1LE PCV seperator, foose 20" wheels, matte black dipped, hotchkis strut tower brace, oracle red halo's, under dash lights, sunroof, interior accent package, metra stereo dash kit with kenwood double din.
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Old 03-10-2015, 09:09 PM   #11
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Not done yet. I'll send ya the info. I'm too busy trying to crack the 500 rwhp barrier, then it's gears. Car should be done in like 2 weeks as I'm waiting on parts.
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Old 03-11-2015, 12:13 PM   #12
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My local dealership quoted me 1600 for everything. Including all new bearings etc
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2010 2SS/RS: 414RWHP
1LE 3.91 differential, Stainless Works/Stainless Power 1 7/8 Catless long tubes, Stainless works Retro Chambered 3" catback, Roto-fab CAI, VMAX CNC ported TB, Vitesse Throttle Controller, elite catch can, 1LE PCV seperator, foose 20" wheels, matte black dipped, hotchkis strut tower brace, oracle red halo's, under dash lights, sunroof, interior accent package, metra stereo dash kit with kenwood double din.
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Old 03-11-2015, 12:29 PM   #13
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Quote:
Originally Posted by bionick View Post
This may be a dumb question but do I need the posi mod in order to burnout both tires when switching to 3.91? Only reason I am asking is because JDP motorsports offeres it in their kit
It's not required, but it does help for drag applications. The factory LSD works pretty well though.

Best regards,

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Old 03-11-2015, 01:51 PM   #14
bionick
 
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Quote:
Originally Posted by JDP Tyler View Post
It's not required, but it does help for drag applications. The factory LSD works pretty well though.

Best regards,

Tyler
888-308-6007
Thanks!
Based off your experience, does 1600 for the whole kit including bearings and everything installed sound fair?
I have heard other people saying they only paid 7-800 etc but that just doesn't sound possible, unless they only got ring and pinion, because the ring and pinion is like $400 for only parts, not including labor, bearings, etc etc lol

Also, if 1600 is a fair price, is 1600 really worth it to have this gear ratio? I have never driven a Camaro equiped with these gears, and don't want to be disappointed 1600$ later lol. Would you say there is quite noticeable difference? Currently I have stock gears, 3.45 I believe?
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2010 2SS/RS: 414RWHP
1LE 3.91 differential, Stainless Works/Stainless Power 1 7/8 Catless long tubes, Stainless works Retro Chambered 3" catback, Roto-fab CAI, VMAX CNC ported TB, Vitesse Throttle Controller, elite catch can, 1LE PCV seperator, foose 20" wheels, matte black dipped, hotchkis strut tower brace, oracle red halo's, under dash lights, sunroof, interior accent package, metra stereo dash kit with kenwood double din.
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Old 03-11-2015, 04:00 PM   #15
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Quote:
Originally Posted by bionick View Post
Thanks!
Based off your experience, does 1600 for the whole kit including bearings and everything installed sound fair?
I have heard other people saying they only paid 7-800 etc but that just doesn't sound possible, unless they only got ring and pinion, because the ring and pinion is like $400 for only parts, not including labor, bearings, etc etc lol

Also, if 1600 is a fair price, is 1600 really worth it to have this gear ratio? I have never driven a Camaro equiped with these gears, and don't want to be disappointed 1600$ later lol. Would you say there is quite noticeable difference? Currently I have stock gears, 3.45 I believe?
That price seems kinda high IMO. We do them for about $300 less than that, but rates will vary.

Best regards,

Tyler
888-308-6007
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Old 03-11-2015, 05:29 PM   #16
bionick
 
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Quote:
Originally Posted by JDP Tyler View Post
That price seems kinda high IMO. We do them for about $300 less than that, but rates will vary.

Best regards,

Tyler
888-308-6007
Another place quoted me 1500..
Is the gear swap worth it? Big noticeable improvements?
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2010 2SS/RS: 414RWHP
1LE 3.91 differential, Stainless Works/Stainless Power 1 7/8 Catless long tubes, Stainless works Retro Chambered 3" catback, Roto-fab CAI, VMAX CNC ported TB, Vitesse Throttle Controller, elite catch can, 1LE PCV seperator, foose 20" wheels, matte black dipped, hotchkis strut tower brace, oracle red halo's, under dash lights, sunroof, interior accent package, metra stereo dash kit with kenwood double din.
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