31 or 35 spline axles

[snappytravis]

So can you guys please explain the main difference between 31 and 35 spline axles are 35 bigger diameter for strength? I have 31 spline axles that I bought about a year ago, and I called strange engineering this morning they tech told me that I should use 35 spline axles, I plan on running sc ls3 with around 750 to 850 horse, what are your thoughts thanks

[Blake Foster]

what tires are you using.?

We use 31's all the time and have never seen a problem on a street car.
I used to have 28 spline strange axles (before i knew anything) in my 9.90 Mustang that had a 650 hp BBF and 14x 32 slicks. they lasted 4 years....

[snappytravis]

Bfg kdw 335/30/18

[intocarss]

Yes a 35 spline axle is bigger in diameter and obviously has more splines then a 31 . I ran 33 spline axles on my drag car with 900+ Hp and never had them twist. I stepped up to 35 spline when I built a new rear end only because, there was no price difference and I added more Hp. I agree with KILLER69.. you should be fine with a 31 spline specially if you're not drag racing and on street tires

Here's a link to a TQ chart for rating axles.. I've heard it's pretty accurate

http://qp.doonce.com/axle_tech.htm

[MillerBuilt]

750-850hp......IMO you are flirting with disaster should you choose a 31 spline, those numbers justify a 33-35 spline. Sleep at night and take Strange's experienced opinion.

I am sure when you called/talked with Strange, the sales/tech asked all the necessary questions prior to his 35 spline recommendation? If so, why would you think Strange (axle GURU's) would steer you wrong? Strange is a solid source and if they are recommending 35 spline for your specific application I would not look to other less knowledgable sources.

Many on this site have individual opinions (as myself) but very few have more real world experience than Strange......listen to the professionals

[6D9 Matt]

I agree I would go with the experience of Strange. I went with the safe route and went 35-spline in my 9". Id rather have the piece of mind and know I wont have to do it twice.