GM 8.5" rear end spline count

[Jay2Cor517]

If you decide to go the TrueTrac route you WILL HAVE TO order 30 spline count axles. https://www.summitracing.com/search?...ord=DTL913A481

[44boggers]

Originally Posted by Jay2Cor517

If you decide to go the TrueTrac route you WILL HAVE TO order 30 spline count axles. https://www.summitracing.com/search?...ord=DTL913A481

https://www.summitracing.com/int/par...a556/overview/

This is for a 28 spline 10 bolt 8.5"

[Jay2Cor517]

Originally Posted by 44boggers

https://www.summitracing.com/int/par...a556/overview/

This is for a 28 spline 10 bolt 8.5"

(Open mouth and insert foot or keyboard) Good catch 44boggers, I stand corrected. I simply should have stated the obvious, the 30 spline axle is stronger and would probably be a better choice for those who decide to change the ratio from the 2.73 to a 3.73 or numerically higher gear set with performance mods--more horsepower, bigger cam, trips to dragstrip etc.

[44boggers]

Originally Posted by Jay2Cor517

(Open mouth and insert foot or keyboard) Good catch 44boggers, I stand corrected. I simply should have stated the obvious, the 30 spline axle is stronger and would probably be a better choice for those who decide to change the ratio from the 2.73 to a 3.73 or numerically higher gear set with performance mods--more horsepower, bigger cam, trips to dragstrip etc.

Yeah I duly understand. Normally I would have done this but I have a different situation than most. I’m building this in Europe so I am relying on people to bring parts over to me since shipping plus inport fees are crazy high. So asking to bring some axle shafts on top of the locker and gears and all my other stuff is not really possible. I won’t have Crazy hp either as it’s a build 305 with power numbers probably in the low to mid 300’s and torque not any higher.

But you are correct. 30 spline axles would be better.
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