Diff gear change:410 to 342
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Diff gear change:410 to 342
04 Silverado 2500HD 4x4 with 6.0L(364)LQ4 engine, 4L80E transmission and standard 16" E Radial Tires-Has anyone else changed from the factory 410 differential gears to 342 gears?
CF Active Member
Joined: Feb 2008
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From: Virginia
RE: Diff gear change:410 to 342
3.42 suck no matter what you are driving. if you tow at all the 3.42 are going to suck compared to the 4.10 you have.
if you are just doing it for gas mileage you would have to own the truck for many many years to break even.
if you are just doing it for gas mileage you would have to own the truck for many many years to break even.
CF Active Member
Joined: Feb 2008
Posts: 243
Likes: 0
From: Virginia
RE: Diff gear change:410 to 342
3.42 suck no matter what you are driving. if you tow at all the 3.42 are going to suck compared to the 4.10 you have.
if you are just doing it for gas mileage you would have to own the truck for many many years to break even.
if you are just doing it for gas mileage you would have to own the truck for many many years to break even.
Thread Starter
Super Moderator
Joined: May 2008
Posts: 2,474
Likes: 20
RE: Diff gear change:410 to 342
410 gears run your revs at @2900RPM at 65MPH, hope you're not towing anything on the highway. Anybody done the 410 to 342 change? How did you adjust the CPU, or did it compensate for itself eventually?
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Joined: Oct 2007
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From: Dayton PA
RE: Diff gear change:410 to 342
You have to change the VSSB unit to adjust the speedo. http://www.tbichips.com/drac/
