Choosing Rear gear ratios
Le Mans Master
Joined: Apr 2012
Posts: 7,814
Likes: 2,265
From: Brighton MI
Yea...it seemed like a solid deal. They claim to do many so they have the procedure down to a routine now. They didn't charge more for seals because he said it was already apart and not extra work, but they did charge more for the new clutches and springs (original quote was $325). All-in with the new C6Z parts, gears, and labor I'm around $1,300 with taxes.
Who knows, maybe it'll all go to crap after break-in. They're a very highly regarded shop in the area, but only time will tell. But so far, so good.
Who knows, maybe it'll all go to crap after break-in. They're a very highly regarded shop in the area, but only time will tell. But so far, so good.
I just sent an email to Drivetrain Specialist to see what it would cost to swap my gears to 4.10's.
This is a straightforward swap...car has 36k miles, don't need replace clutches or all that, new seals for sure, but that should be about it. I'm 325 rwhp, so don't need C6-Z level parts.
Will let you know what I hear back.
Hate all of you...
Le Mans Master
Joined: Apr 2012
Posts: 7,814
Likes: 2,265
From: Brighton MI
Burning Brakes
Joined: Oct 2014
Posts: 874
Likes: 107
From: Detroit MI
Mine we broken too, and my car just had 50k easy miles on it. Upgrade the washers at a minimum.
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,355
Likes: 139
From: Surprise AZ
Only a week to go. And I'm getting excited. Can't wait to try out those 4.10s. After a number of searches on the site it seems that most people lost 1-2mpg highway or no loss of mileage at all. So that's nice. But I can't wait to feel the difference. Anyone have results to share?
Race Director
Joined: Jul 2007
Posts: 17,750
Likes: 1,210
From: Aiken, SC
St. Jude Donor '13 thru '26
Only a week to go. And I'm getting excited. Can't wait to try out those 4.10s. After a number of searches on the site it seems that most people lost 1-2mpg highway or no loss of mileage at all. So that's nice. But I can't wait to feel the difference. Anyone have results to share?
With 4:10's I say mileage be damned I'm having fun! 
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,355
Likes: 139
From: Surprise AZ
Originally Posted by Jeff T.
It's a Corvette not a Corolla!! With 4:10's I say mileage be damned I'm having fun!
With 4:10's I say mileage be damned I'm having fun! 
Drifting
Joined: Apr 2015
Posts: 1,893
Likes: 295
From: Buffalo NY
After 15 months and 15k of Corvette ownership I find that the only time I check my fuel economy is on long road trips (over 2 hours). Around town I'm just having too much fun to worry about that stuff. Besides, it's tough to put together an apples to apples comparison with 4.10s to 3.42s around town - the 4.10s make it so much more fun to drive that you're constantly getting on it, moreso than with the stock tall gearing.
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Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,355
Likes: 139
From: Surprise AZ
Originally Posted by nsogiba
After 15 months and 15k of Corvette ownership I find that the only time I check my fuel economy is on long road trips (over 2 hours). Around town I'm just having too much fun to worry about that stuff. Besides, it's tough to put together an apples to apples comparison with 4.10s to 3.42s around town - the 4.10s make it so much more fun to drive that you're constantly getting on it, moreso than with the stock tall gearing.
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,355
Likes: 139
From: Surprise AZ
Originally Posted by Brit dex
Will going from 3.15 to 4.11s in an auto make the same sort of impact? Worth considering?
I'm putting LS6 heads on soon... It's a 99 ..
I'm putting LS6 heads on soon... It's a 99 ..
Last edited by Nyt_Muves; May 4, 2017 at 02:09 PM.
1/4 mile/AutoX
Joined: Jun 2014
Posts: 11,441
Likes: 2,186
From: Buffalo Texas
I haven't really talked to anyone with an auto who has done 4.10s. I would imagine it would be quite impactful as that's a big change from 3.15s. I'm not sure of the final drive though and am really unsure as to effect on top end and economy. I bet it would be a kick in the pants to drive though.
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,355
Likes: 139
From: Surprise AZ
Update:
When they opened the rear they found metal fragments that had scored inside the housing so I'm just having them order and install a brand new unit stem to stern. So it will be at least another week. But it will be a brand new performance built rear when done. Not really much more money than rebuilding the existing unit. So I think that will be great. I like the idea of new.
When they opened the rear they found metal fragments that had scored inside the housing so I'm just having them order and install a brand new unit stem to stern. So it will be at least another week. But it will be a brand new performance built rear when done. Not really much more money than rebuilding the existing unit. So I think that will be great. I like the idea of new.
Racer
Joined: Nov 2014
Posts: 390
Likes: 58
From: Columbus, OH
Interest to hear your review as well, my diff wines a good bit, thinking it is going to need attention before I do H/C. My car is more of a back road canyon carver and I was afraid that too short of gears would cause issues with my driving style, at least thats what my previous research pointed too... eventual goal is fun streetable 430 is whp.
Thread Starter
Drifting
Joined: Apr 2008
Posts: 1,355
Likes: 139
From: Surprise AZ
Originally Posted by Joepro95
Interest to hear your review as well, my diff wines a good bit, thinking it is going to need attention before I do H/C. My car is more of a back road canyon carver and I was afraid that too short of gears would cause issues with my driving style, at least thats what my previous research pointed too... eventual goal is fun streetable 430 is whp.