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Old 02-25-2011, 03:25 PM   #1
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LS3 with 3.70 gears input?

I'm still gathering up the money for gears but I'm researching so that when I'm ready I'll know what I want.

I'm looking for some input for those that have and LS3 and added 3.70 gears. I'm still thinking that for a daily driver and only occassional track use the 3.70 might be a better choice than 4.11 gears.

I heard they are even putting 3.70 in the ZL1.

If you added 3.70 gears can you give any feedback about how they feel? Did you feel the difference going from the 3.45 to 3.70? Do you ever feel like you might want a little more gear? If you had it to do again would you have gone with 4.11 gears?
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Old 02-26-2011, 01:26 AM   #2
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Caverman, PM Camaro21. He has the 3:70 in his car.
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Old 02-26-2011, 01:29 AM   #3
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I thought 3.73 was going in the ZL-uno ???
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Old 02-26-2011, 05:16 AM   #4
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I'm looking into this range of gears as well. Anyone with the LS3 and 3.73 gears that can comment on shift points, cruising/highway RPM, mileage, etc.? I know I'm not looking for the 4.11s cuz I'm not building a 1/4 mile car. but i do like to play around!!!
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Old 02-26-2011, 06:36 AM   #5
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Lots of good info here:

http://thehorsepowerjunkies.com/vehi...swappin-gears/
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Old 02-26-2011, 07:01 AM   #6
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I'm also interested in anybody's experiences with this setup. Considering 4.11 or 3.73 right now.
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Old 02-26-2011, 07:15 AM   #7
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I put 3:70's (9 inch) in mine back in August ish (long story) and finally got the car back in December (early). Put only a few hundred on it since then, but the difference is quite noticeable. Much faster from the start. A little tricky accelerating with PZeros that are cold but part of that is the horsepower increase. Cruising at 70 is about 1900 rpm. Overall I like the change, let you know more in March after first track visit.
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Old 02-26-2011, 08:01 AM   #8
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Well from my experience, the 3.70 is not enough. I started with the 4.33 (one of the first guys to run them) and I thought they were perfect. Due to circumstances beyond my control, I had to replace them with a set of the LPE 3.70's. They feel ok, but my combo and driving habits would like more gear down low with my cammed motor. Not a time goes by that I don't want the higher gear. I am now saving for a 9" setup and it will have 4.30's in it for sure.
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Old 02-26-2011, 11:05 AM   #9
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going from a 3.45 to a 3.70 is barely anything, and hardly justifies spending that kind of dough.
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Old 02-26-2011, 12:08 PM   #10
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I have already ordered my 4.11s for my LS3. Still just under 2000rpm at 70mph from what I have heard.
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Old 02-26-2011, 12:20 PM   #11
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4.10s are the way to go, i love mine
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Old 02-26-2011, 12:33 PM   #12
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4.10s are very streetible gears they are highway friendly and my gas mialage didnt change at all, its a heavy car the 4.10s help a lot and at 70 its less lug to maintain speed, if i could do it again id go 4.33s , the 4.10s are a little tricky to launch hard but well worth it.
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Old 02-26-2011, 01:02 PM   #13
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The ZL-1 is supposed to come with 3:70 gears. The new Mustang 5.0 has them as well. Just to compare speeds on my 3.70 gears. Use these speeds to compare to your M6 factory 3:45 gears.

2,000 rpm 4th gear = 45 mph
2,000 rpm 5th gear = 55 mph
2,000 rpm 6th gear = 68 mph

Not a huge change but very nice on the street plus it makes 5th and 6th more practicle on the freeway. My car will not be on the drag strip.
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Old 02-26-2011, 01:14 PM   #14
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Quote:
Originally Posted by Never Satisfied View Post
Well from my experience, the 3.70 is not enough. I started with the 4.33 (one of the first guys to run them) and I thought they were perfect. Due to circumstances beyond my control, I had to replace them with a set of the LPE 3.70's. They feel ok, but my combo and driving habits would like more gear down low with my cammed motor. Not a time goes by that I don't want the higher gear. I am now saving for a 9" setup and it will have 4.30's in it for sure.
Care to share why you changed them?

4.33s are on the way for the m6

engine hits the limiter @ 62mph in 1st with stock gears
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Old 02-26-2011, 01:18 PM   #15
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At first I though 4.11 sounded too high but after thinking about it...I am never going to be driving over 170 mph so who cares about the top end speed. What i do care about is that I now rarely use 6th gear in my car because I have significant drone below 2000 rpms due to headers/exhaust and I'm at 80 mph+ to get over 2000 rpm's. So currently cruise highway at about 70-75 mph in 5th at 2100-2500 rpm's. If i went to 4.11's I'd be right around 2000 to 2200 rpms in 6th at 70-75. Waste less gas on the highway, no drone, quicker accleration...sold on 4.11's once I have the time and money to do it!
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Old 02-26-2011, 01:19 PM   #16
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Quote:
Originally Posted by LC View Post
Care to share why you changed them?

4.33s are on the way for the m6

engine hits the limiter @ 62mph in 1st with stock gears
willing to bet a pretty penny that he broke them.
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Old 02-26-2011, 01:31 PM   #17
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Quote:
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Care to share why you changed them?

4.33s are on the way for the m6

engine hits the limiter @ 62mph in 1st with stock gears
Yes, they broke, but only because of improper installation. I was very happy with the performance of the 4.33's but I found a brand new 3.70 geared, fully assembled center from Robin Lawrence. It was a a steal and I made the decision it would have to work until I fork over the money for the 9" setup.
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Old 02-26-2011, 01:33 PM   #18
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willing to bet a pretty penny that he broke them.
You are on, but only if your penny looks like this



EDIT: bleh took so long to post..
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Old 02-26-2011, 01:37 PM   #19
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Originally Posted by Never Satisfied View Post
Yes, they broke, but only because of improper installation. I was very happy with the performance of the 4.33's but I found a brand new 3.70 geared, fully assembled center from Robin Lawrence. It was a a steal and I made the decision it would have to work until I fork over the money for the 9" setup.
I hope 4.33s are the cure for my NA "lag".

I can stomp WOT on 5th at 2000rpm and its like having a HUGE OVERSIZED turbo.. just NOTHING happens, imagine 6th
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Old 02-26-2011, 01:40 PM   #20
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Well, when I had the 4.33's my car was fairly stock and it made a HUGE difference. I firmly believe it would have pulled to redline in 6th.

Darn it, this discussion is making me want to say "screw it" and drop the money into the 9" now!
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Old 02-28-2011, 10:26 AM   #21
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Quote:
Originally Posted by Never Satisfied View Post
Well, when I had the 4.33's my car was fairly stock and it made a HUGE difference. I firmly believe it would have pulled to redline in 6th.

Darn it, this discussion is making me want to say "screw it" and drop the money into the 9" now!
Let me know If I can supply you with one.

Ted.
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Old 02-28-2011, 11:06 AM   #22
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Ted, I'm still a little way off, but can you PM me a price for the complete setup?
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Old 02-28-2011, 11:25 AM   #23
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Ted, I'm still a little way off, but can you PM me a price for the complete setup?
Prices are always changing so just keep me in mind when you think your ready and I will do my best.

Ted.
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Old 02-28-2011, 12:19 PM   #24
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Tried a 3:70 now have a 4:33 and love it. 3:70 not enough for an M6. Shift 1,3,5 around town at 2000rp with big cam. It will still hit 130 in 4th gear. 4:33 adds 110 ft lb of torque over stock gear. Cruise at 2,050 rpm @ 70mph and get 22-23 mpg on highway. Lost about 3 mpg on highway over stock with cam and gear. Keep the stock clutch.

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Old 02-28-2011, 02:57 PM   #25
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How much did your ET drop from the gear change?
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