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

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Old 04-28-2011, 02:20 AM   #1
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New Lingenfelter 3.91 Gears!!

Dont know if its a repost but heres the link:

http://www.lingenfelter.com/mm5/merc...egory_Code=C61

I need a good excuse to tell the wife that the car needs better gears, maybe if I tell her that I will get better mileage ..

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Old 04-28-2011, 11:35 AM   #2
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How does this compare to the 4.11's for the manual transmission? Stronger/safer than the 4.11's?

-Funk
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Old 04-28-2011, 11:50 AM   #3
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Wow, $800 for gears. It pays to be the first to come out with something for a 5thgen.
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Old 04-28-2011, 12:08 PM   #4
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Quote:
Originally Posted by pnyklr View Post
How does this compare to the 4.11's for the manual transmission? Stronger/safer than the 4.11's?
-Funk
According to the LPE site it says that they have the same quality as the OEM ones.

LPE Ring & Pinion Specifications:
- Designed to meet original equipment specifications
- Manufactured by American Axle the original equipment gear supplier for Camaro SS
- Gear material is a modified SAE 4320 steel alloy



Quote:
Originally Posted by jtmiller92 View Post
Wow, $800 for gears. It pays to be the first to come out with something for a 5thgen.
Plus $200 for the install kit


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Old 04-28-2011, 01:14 PM   #5
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for someone who is not current in gears tell me what does that mean? higher 1/4 times, faster 0-60, etc. what makes it special? how is it different than 3:73?
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Old 04-28-2011, 01:28 PM   #6
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Well I'm too late because I just had 411 gears installed on mine, but I would have definitely tried the 3.91's if I would have waited a little longer. Those(3.91) are probably perfect for the street/track guy with 600-800 HP!! Will somebody please try them and post results!!
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Old 04-28-2011, 01:42 PM   #7
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for someone who is not current in gears tell me what does that mean? higher 1/4 times, faster 0-60, etc. what makes it special? how is it different than 3:73?
Exactly. Much faster in the low end, lose top end and MPG.
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Old 04-28-2011, 02:20 PM   #8
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Wow I should have just bought a corvette
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Old 04-28-2011, 09:39 PM   #9
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Wow, that looks like some good stuff ... Nice torque gain of 45-50 at the wheels and no ECM calibration for speedo on the LS3 ...
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Old 04-29-2011, 12:55 PM   #10
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Originally Posted by jtmiller92 View Post
Wow, $800 for gears. It pays to be the first to come out with something for a 5thgen.
No kidding huh...I think 3.91 would be the perfect ratio for me in this car, but for the price of admission, I'll stay with the stock gears for a while.
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Old 04-29-2011, 12:58 PM   #11
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Wow, that looks like some good stuff ... Nice torque gain of 45-50 at the wheels and no ECM calibration for speedo on the LS3 ...
Technically you are gaining ft*lbs at the wheels...but people can be deceived by the changes resulting from a rear end gear change...Depending on where (rpm) that your setup makes power, and what type of driving/racing you're doing (and how much you want to be shifting), a numerically higher gear could be good or bad.
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Old 04-29-2011, 01:59 PM   #12
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$800?
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Old 04-29-2011, 02:23 PM   #13
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Still don't get the point. Use stock gears, and figure out how to get better low end torque and keep tires on the pavement. My tires spin in all gears and I don't even have an SC installed yet. So, still can't understand the whole point of paying all this cash for some gears.
I would think if you have an SC, all the top of the line suspension stuff, best wheels and tires and stock gears your a perfect driver, and could use some better low end speed then upgrade gears otherwise you don't need them.
I'm only 475rwhp. and can't keep tires down on the pavement in 3rd. gear, so not sure whats' up with that, but I surely don't need any gears that's for sure.
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Old 04-29-2011, 03:01 PM   #14
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Quote:
Originally Posted by FiveO View Post
Well I'm too late because I just had 411 gears installed on mine, but I would have definitely tried the 3.91's if I would have waited a little longer. Those(3.91) are probably perfect for the street/track guy with 600-800 HP!! Will somebody please try them and post results!!
I've been waiting for the 3.91's from Lingenfelter ever since I broke my 3.73 Richmond's at C5festII. I just talked to them today and they haven't received them yet from AAM, but hopefully the first part of next week. My rear diff is really wanting to get back in my car.
I'll keep everyone posted as to my first impressions as soon as they arrive.

Here's a pic of my broken Richmond's:
Name:  RearDifferentialgearsbroken038.jpg
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Old 04-29-2011, 05:27 PM   #15
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Quote:
Originally Posted by mtcwby View Post
I've been waiting for the 3.91's from Lingenfelter ever since I broke my 3.73 Richmond's at C5festII. I just talked to them today and they haven't received them yet from AAM, but hopefully the first part of next week. My rear diff is really wanting to get back in my car.
I'll keep everyone posted as to my first impressions as soon as they arrive.

Here's a pic of my broken Richmond's:
Attachment 235498
Sorry to hear about your diff...I was posting a few weaks ago that 3.70's were backordered because people were experiencing 3.73 breaks and no one wanted to believe me...said I was confused! I'm waiting on the 3.70's or 3.91's and glad someone else gave me the heads up before I put the 3.73's in
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Old 04-30-2011, 12:49 PM   #16
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Well I can say that so far the 411's have been perfect!! My installer didn't even need an INSTALLATION KIT and I haven't experience any type of whine that 90 percent of the guys here are experiencing with a new set of gears being installed. I believe forum member Nemisis had problems with his 3.70 gears. But hopefully the 4.11's and 3.91's will be the final fix for most of the problems that some members were experiencing.
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Old 05-01-2011, 06:55 PM   #17
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Quote:
Originally Posted by FiveO View Post
Well I can say that so far the 411's have been perfect!! My installer didn't even need an INSTALLATION KIT and I haven't experience any type of whine that 90 percent of the guys here are experiencing with a new set of gears being installed. I believe forum member Nemisis had problems with his 3.70 gears. But hopefully the 4.11's and 3.91's will be the final fix for most of the problems that some members were experiencing.
If your installer didn't use an installation kit, then I take it that he reused the factory pinion bearings. Not a good practice, since the bearing cage is nearly always damaged when pulling them off the old pinion. I hope he at least bought new bearings, races, pinion seal and crush washer.
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Old 05-01-2011, 07:21 PM   #18
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Originally Posted by mtcwby View Post
If your installer didn't use an installation kit, then I take it that he reused the factory pinion bearings. Not a good practice, since the bearing cage is nearly always damaged when pulling them off the old pinion. I hope he at least bought new bearings, races, pinion seal and crush washer.
not really true,, with the correct tools the bearings can be pulled off without even touching the bearing cage, i pull them off without damage all the time.
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Old 05-01-2011, 09:24 PM   #19
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Quote:
Originally Posted by mtcwby View Post
If your installer didn't use an installation kit, then I take it that he reused the factory pinion bearings. Not a good practice, since the bearing cage is nearly always damaged when pulling them off the old pinion. I hope he at least bought new bearings, races, pinion seal and crush washer.
I've personally observed my installer replace gears numerous time without the installation kit and his customers never had any problems. Just as Camaro1 stated with the proper equipment this can be done numerous times without any problems or any type of whine. But we need to stay on topic, not trying to jack this thread.
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Old 05-01-2011, 10:28 PM   #20
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Originally Posted by calbert1999 View Post
Still don't get the point. Use stock gears, and figure out how to get better low end torque and keep tires on the pavement. My tires spin in all gears and I don't even have an SC installed yet. So, still can't understand the whole point of paying all this cash for some gears.
I would think if you have an SC, all the top of the line suspension stuff, best wheels and tires and stock gears your a perfect driver, and could use some better low end speed then upgrade gears otherwise you don't need them.
I'm only 475rwhp. and can't keep tires down on the pavement in 3rd. gear, so not sure whats' up with that, but I surely don't need any gears that's for sure.
As far as your 60' (launch) is concerned, with a lot of power...think of your gears as a lever.

If you're trying to lift an extremely heavy weight...not only does a very long lever make it easier to lift, but it also makes it significantly easier to move the weight an exact distance up or down.

Numerically higher gears can have the same effect...not only do they make it easier to push the car forward from a stop, they also make it easier for the driver to push the tires right to the edge of breaking traction without actually spinning them...just like on so many cars with crappy brakes...lots of them can still lock the tires...but they can't make that 60 to 0 stop in nearly the same distance as massive Brembo's or other fancy brakes...the bigger better brakes not only offer more power, but also offer more control to the driver.
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Old 05-02-2011, 07:46 AM   #21
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Am I the only one curious about the Lingenfelter claim that no speedometer correction is required with the AAM 3.70 and 3.91 gears in the LS3 6spd manual cars ?? Yet every mail order tuner on this site claims a "tune" is required for speedometer correction even on the LS3 6spd manual cars.
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Old 05-02-2011, 10:34 AM   #22
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Am I the only one curious about the Lingenfelter claim that no speedometer correction is required with the AAM 3.70 and 3.91 gears in the LS3 6spd manual cars ?? Yet every mail order tuner on this site claims a "tune" is required for speedometer correction even on the LS3 6spd manual cars.
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I believe that is a mistake. I had their 3.70 gearset and the speedometer was off until my tuner reset it.
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Old 05-02-2011, 10:55 AM   #23
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I believe that is a mistake. I had their 3.70 gearset and the speedometer was off until my tuner reset it.
Yes, you are right. Looked at the Camaro ECM, BCM wiring and the input for the speedo comes from the VSS located on the passenger side of the transmission housing reading the transmission output shaft.
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Old 05-02-2011, 03:54 PM   #24
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Quote:
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not really true,, with the correct tools the bearings can be pulled off without even touching the bearing cage, i pull them off without damage all the time.
Quote:
Originally Posted by FiveO View Post
I've personally observed my installer replace gears numerous time without the installation kit and his customers never had any problems. Just as Camaro1 stated with the proper equipment this can be done numerous times without any problems or any type of whine. But we need to stay on topic, not trying to jack this thread.
Why would you spend $800 on new gears, plus labor and not spend another
$60 on putting new bearings on your pinion and axles?? Anytime you are already in there it only makes good sense to spend just a fraction more and do the job right. Also, the installation kit includes a new pinion yoke nut, new ring gear bolts and gasket.
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Old 05-02-2011, 04:29 PM   #25
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So even LS3s need a tune to correct the speedometer?

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