Front differential gears
#12
TECH Veteran
When I had the Radix in my Avalanche, I saw a significant increase in performance going from 3.73's to 4.10's. Given that experience I would say it is certainly worthwhile to consider it. If performance was my only consideration I would do it again in a heartbeat.
Regarding 4.56's, keep in mind the inherent weakness of a 4.56 pinion gear in a 10-bolt application. With the kind of power you are making I'm sure you would break the gears in one hard 2WD launch.
Also, I will second the sentiment of going with OEM (AAM) gears. People will try and convince you that other gears are just as good, but once you start digging deeper you will find that they just mean less expensive. You can't get stronger and quieter than OEM/AAM gears.
Regarding 4.56's, keep in mind the inherent weakness of a 4.56 pinion gear in a 10-bolt application. With the kind of power you are making I'm sure you would break the gears in one hard 2WD launch.
Also, I will second the sentiment of going with OEM (AAM) gears. People will try and convince you that other gears are just as good, but once you start digging deeper you will find that they just mean less expensive. You can't get stronger and quieter than OEM/AAM gears.
#13
I am seriously considering 4.56's. The truck really isn't a daily driver now so the loss in highway driving wouldn't be an issue. Some even saying an increase in mileage around town with gears, anyway its not about gas mileage at this point.
Looking at about the same money in gears just going 4.10's. If I do the installs myself. Might save a little money with 4.10's, if I found a front diff out of an SS and were paying someone to do the installs.
4.56's would actually put the truck a little bit more in its power band looking at 1/4 mile. Peak HP at 5800 rpm, or was at my last dyno run. 4.56's would put me through the traps at about 5200 rpm. With 3.73's I'm at about 4200.
Course this all depends on traction. Will I be able to hook on on street tires in 4wd... keeping similar or improved 60' times.
Looking at about the same money in gears just going 4.10's. If I do the installs myself. Might save a little money with 4.10's, if I found a front diff out of an SS and were paying someone to do the installs.
4.56's would actually put the truck a little bit more in its power band looking at 1/4 mile. Peak HP at 5800 rpm, or was at my last dyno run. 4.56's would put me through the traps at about 5200 rpm. With 3.73's I'm at about 4200.
Course this all depends on traction. Will I be able to hook on on street tires in 4wd... keeping similar or improved 60' times.
#14
Originally Posted by TBSS
When I had the Radix in my Avalanche, I saw a significant increase in performance going from 3.73's to 4.10's. Given that experience I would say it is certainly worthwhile to consider it. If performance was my only consideration I would do it again in a heartbeat.
Regarding 4.56's, keep in mind the inherent weakness of a 4.56 pinion gear in a 10-bolt application. With the kind of power you are making I'm sure you would break the gears in one hard 2WD launch.
Also, I will second the sentiment of going with OEM (AAM) gears. People will try and convince you that other gears are just as good, but once you start digging deeper you will find that they just mean less expensive. You can't get stronger and quieter than OEM/AAM gears.
Regarding 4.56's, keep in mind the inherent weakness of a 4.56 pinion gear in a 10-bolt application. With the kind of power you are making I'm sure you would break the gears in one hard 2WD launch.
Also, I will second the sentiment of going with OEM (AAM) gears. People will try and convince you that other gears are just as good, but once you start digging deeper you will find that they just mean less expensive. You can't get stronger and quieter than OEM/AAM gears.
If I do the gear swap and 4.10's they will be OEM.
Last edited by KySilverado; 12-22-2006 at 10:51 PM.
#15
Originally Posted by j's01silverado
What is the height of the wheels you run at the track? 4.10's and a smaller track tire may be a better solution since the tire size does effect the overall drive ratio.
#17
TECH Fanatic
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Originally Posted by KySilverado
4.56's would actually put the truck a little bit more in its power band looking at 1/4 mile. Peak HP at 5800 rpm, or was at my last dyno run. 4.56's would put me through the traps at about 5200 rpm. With 3.73's I'm at about 4200.
Course this all depends on traction. Will I be able to hook on on street tires in 4wd... keeping similar or improved 60' times.
Course this all depends on traction. Will I be able to hook on on street tires in 4wd... keeping similar or improved 60' times.
#18
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i have 4.10's in mine with 32.?? tires. i came from 3.73's and i could tell a pretty big difference. i need to get some 4.10's up front so i can have 4wd again. im just too cheap to do it.
oh btw i also had a trutrac installed at the same time. it sucks offroad in case anybody was wondering.
oh btw i also had a trutrac installed at the same time. it sucks offroad in case anybody was wondering.
#20
TECH Veteran
Originally Posted by 04BlackGmc
never heard this 4.56 issue since most the of th 4wd guys have them.