spline info please help!

[BadA55f0Xxx]

Im ordering a rear end upgrade kit aswell as tranny and other parts that require spline amount? What the **** is da spline? And do they all have to be the same? What's it do any info please would help thanks. .

 

[cledusdtrucker]

28 is stock
its the # of teeth on the end
upgrade to a 31 spline its much stronger!
if you do you will need a new carrier to

 

[MaximumRisk]

you are going to have to give us more info.
First of all what year/model?
Assuming its a 5.0, the transmission input shaft is 10 spline if you want to upgrade you can go to 26 spline, keep in mind that you have to get a 26 spline clutch if you do.
For the rear, stock axles and differential are 28 spline. You can always go to 31 spline (or higher) you'll need axles and carrier to be 31 spline.
The higher spline parts can take more abuse before twisting or shearing

 

[Mr. Sonic GT.]

28 is stock
its the # of teeth on the end
upgrade to a 31 spline its much stronger!
if you do you will need a new carrier to

You have to put down a lot of power to mess up the stock spline not everyone sits in a burn out box for like 10 mins.

 

[Stangzilla]

If you are making 350hp or less at the flywheel there is no need to have more that a 28spline axle. You can just get a set of Moser or Strange aftermarket axles in 28 spline. Even then they are only needed if u r running a nice set of drag radials or slicks at the track. I am yet 2 c a set of stock axles break on the street with street tires unless you cant take your foot off the gas if you start wheel hopping while spinning.. Your choice though..

 

[BadA55f0Xxx]

Im pushin more than 450 and I plan on more than that prob throw on better heads and a bottle I will b runnin slicks on da track I just need to kno if the spline on da tranny hav 2 match the amount on the rear axles and the driveshaft and if gears are affected by the spline or they all still fit. .thanks

 

[cledusdtrucker]

the more splines the better
trany and rear end don't need to match
rear carrier and axles have to match

 

[Stangzilla]

Im pushin more than 450 and I plan on more than that prob throw on better heads and a bottle I will b runnin slicks on da track I just need to kno if the spline on da tranny hav 2 match the amount on the rear axles and the driveshaft and if gears are affected by the spline or they all still fit. .thanks

More than 450hp huh? What's your combo now? Heads, cam, is it stroked? R u runnin a blower? If so what kind. What compression r u running?

 

[BadA55f0Xxx]

Im runnin a 306 forged internals with a compression ratio of 11:1 hydraulic roller cam stage 3 fully machined gt-40 heads and intake manifold with a 750dp carb and everyother bolt on as been upgraded as far as electrical cooling and exhaust

 

[Timspony]

...I ran 31 spline Moser Race axles with my 625hp 1991 GT....

 

[meanlx]

Im runnin a 306 forged internals with a compression ratio of 11:1 hydraulic roller cam stage 3 fully machined gt-40 heads and intake manifold with a 750dp carb and everyother bolt on as been upgraded as far as electrical cooling and exhaust

450 at the crank or to the wheels? You didn't mention if you had a power adder or not.......with the mods you listed, I'd think you'd need one to make that much power.

 

[BadA55f0Xxx]

450 to the crank no power adder runnin on 100 octane and a lean timing

 

[meanlx]

Even 450 at the crank sounds very high for a n/a 306 with h/c/e/i etc. What do you mean by "lean" timing? Who tuned your car?

Either way, do the 31 spline upgrade.

 

[MaximumRisk]

I think he means a lean AFR (fuel)
but yeah, I believe Meanlx is right, It would be hard for a N/A 306 to reach the 450hp mark, specially with those heads.

Anyways, build it, enjoy it and when the time comes go with more cubes (347)
or if you are interested, I have a used Zex nitrous kit that you can buy (for cheap) that will help you reach your power goals with the 306
Good luck!