Go Back  Offshoreonly.com > General Discussion > Trucks, Trailers and Transportation
Gearing for 1/2 chevy. 4.10 or 4.56? >

Gearing for 1/2 chevy. 4.10 or 4.56?

Notices

Gearing for 1/2 chevy. 4.10 or 4.56?

Old 06-05-2020, 03:00 PM
  #1  
Registered
Thread Starter
iTrader: (1)
 
Join Date: Oct 2013
Location: SF Bay Area
Posts: 2,667
Received 26 Likes on 19 Posts
Default Gearing for 1/2 chevy. 4.10 or 4.56?

2013 Silverado LTZ Z71

The OEM gears are 3.08 and with 33” tires it’s already a dog. 5.3l 6sp tranny.

I still do a lot of long distance highway driving and occasionally tow the Baja272 or a loaded cargo trailer. Trips are usually less than an hour but may step up to a few four or five hour drives with some grades.

4.56 seems a tad overkill but checking with the OSO brain trust for real experience.
Baja Rooster is offline  
Old 06-15-2020, 01:32 PM
  #2  
Platinum Member
Platinum Member
iTrader: (1)
 
articfriends's Avatar
 
Join Date: Jun 2004
Location: Frankenmuth
Posts: 6,464
Received 40 Likes on 26 Posts
Default

The 6l80 is one of the newer transmissions that DOESNT have a 1-1 gear somewhere BUT forth gear is close at 1.15. Currently in 6th gear (.67-1) it turns your 3.08 into 2.06 -1 final drive. A 4.56 x .67 would be 3.05-1, if you were to put your truck in 4th gear and drive it, the rpms would be fairly close to what a 4.56 would feel like just to see IF at highway "speed" you were ok with it, personally a 4.10 is probably better overall. Check your driveshaft length too and go on spicers 'critical speed chart" and see where THAT magic number is before going with 4.56s, IF you drive at 90 on highway empty like some of us, you may find you may possibly have a terrible vibration, the chart doesnt lie, just chased this on my duramax with stock tires and stock gears with smaller but HD steel driveshaft, Smitty
articfriends is offline  
The following 3 users liked this post by articfriends:
Baja Rooster (06-15-2020), Gimme Fuel (06-18-2020), Sydwayz (06-16-2020)
Old 06-15-2020, 09:47 PM
  #3  
Registered
Thread Starter
iTrader: (1)
 
Join Date: Oct 2013
Location: SF Bay Area
Posts: 2,667
Received 26 Likes on 19 Posts
Default

Originally Posted by articfriends View Post
The 6l80 is one of the newer transmissions that DOESNT have a 1-1 gear somewhere BUT forth gear is close at 1.15. Currently in 6th gear (.67-1) it turns your 3.08 into 2.06 -1 final drive. A 4.56 x .67 would be 3.05-1, if you were to put your truck in 4th gear and drive it, the rpms would be fairly close to what a 4.56 would feel like just to see IF at highway "speed" you were ok with it, personally a 4.10 is probably better overall. Check your driveshaft length too and go on spicers 'critical speed chart" and see where THAT magic number is before going with 4.56s, IF you drive at 90 on highway empty like some of us, you may find you may possibly have a terrible vibration, the chart doesnt lie, just chased this on my duramax with stock tires and stock gears with smaller but HD steel driveshaft, Smitty
THANK YOU! Invaluable input as always, Smitty.
Baja Rooster is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


OSO Sponsor
OSO Advertiser
OSO Advertiser

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

OSO Advertiser