yes size matters in this case, its rather foolish in my opinion to buy expensive aftermarket parts for a smaller size and strength rear differential if the basic problem is that the rear differential your working on and hoping to increase the durability of,is composed of components that are too small and fragile to take the abuse, if that rear differential was never designed to hold up to loads near what your subjecting it to. Its smarter to start with a basic rear differential design with the required mass and strength that even stock components will be reasonably expected to stand the loads imposed at least for awhile and then up grade to the stronger components, that way you've got a decent chance of having a durable rear when your done!
now obviously larger rear differential tend to be heavier, but you need to reach a compromise where your not constantly busting components or weights of no concern, if you can,t finish a race.
axle material and diam. plus the increased spline counts help and ring and pinon gears,and bearings in the larger rear differentials, being more massive is a huge help, in durability, but remember U-joints and half shafts fail frequently under high shock torque loads so its not just the rear differential that fails in IRS cars
GM 7.875" (dana 36)
GM 8,5" (10 BOLT)(dana 44)
GM 8.875" (12 bolt)
FORD 9"
DANA 60 9.75"
GM 10.5" (14 bolt)
http://forums.corvetteforum.com/c4-tech ... -kits.html
http://chassisengineering.com/shopDetai ... uctId=1199
http://www.vansteel.com/index.cfm?fusea ... 06&ID=2384
http://www.differentials.com/install.html
now obviously larger rear differential tend to be heavier, but you need to reach a compromise where your not constantly busting components or weights of no concern, if you can,t finish a race.
axle material and diam. plus the increased spline counts help and ring and pinon gears,and bearings in the larger rear differentials, being more massive is a huge help, in durability, but remember U-joints and half shafts fail frequently under high shock torque loads so its not just the rear differential that fails in IRS cars
GM 7.875" (dana 36)
GM 8,5" (10 BOLT)(dana 44)
GM 8.875" (12 bolt)
FORD 9"
DANA 60 9.75"
GM 10.5" (14 bolt)
http://forums.corvetteforum.com/c4-tech ... -kits.html
http://chassisengineering.com/shopDetai ... uctId=1199
http://www.vansteel.com/index.cfm?fusea ... 06&ID=2384
http://www.differentials.com/install.html