30 spline Axeles in a 8 3/4

[Duster Drag Car]

how much abuse can 30 spline axeles take changing my ring and pinion to 4.30s has a 30 spline spool with factory axeles noticed the ends of the axele splines are starting to twist so im going to replace them with doctor diff axeles do i need to buy a 35 spline spool and 35 spline axeles hate to buy another spool . 2800lb Duster 600 hp give or take 3800 stall

 

[805moparkid]

well the fact you have a spool and a light car help... but still with 600hp i might be looking at 35's... im running the doc 30 axles and spool as well but im just nudging 300hp and 13's lol...

 

[Duster Drag Car]

thaks

 

[Duster Drag Car]

well the fact you have a spool and a light car help... but still with 600hp i might be looking at 35's... im running the doc 30 axles and spool as well but im just nudging 300hp and 13's lol...

Thanks

 

[kidintheyard]

My 30 spline doctor dif axles are holding up fine but my bucket is only putting out 380 to the ground

 

[BBBCUDA]

A fellow I know was running 9.60's in a Challenger with the 30 spline stuff, but aftermarket axles. The ring gear gave up the ghost, but the axles were fine.

 

[nqkjw]

I'm running Currie 30spline in a spooled 3.73 centre.
Best 60ft is 1.62
Car is 3500lb with 303hp at the treads.
Stripped a 741 crownwheel and pinion a year ago but the axles looked to be OK.
Car has now done 379 passes and sees it's share of street use as well.

 

[briankaplan]

I'm running stock axles. 4.30 gear and drag radials. The only thing i have
broke so far is a front U joint. Think it was a bad one to begin with. Even
though I got it from NAPA.
I run 13.0's to 12.90's.

 

[BadFish67]

I'm running 30 spline Moser axles with a spool. 2900# and running mid to high 9's for years.

 

[mopar65]

I am useing moser(spelling) 30 spline axles,742 case,430 gears and spool in my 3500 pound 73 dodge dart. I have only ran a best 60 foot of 1.52-1.54 at 10.68 at 125 in the 1/4. i would like to up grade to a 35 spline spool. But when i break this 8-3/4 again i am going to a dana 60. if it matters my rearend is back braced.

 

[pettybludart]

I twisted Moser axels with 4.30 gear and spool behind my 3000lb car with about 525hp.60fts were 1.50.Now have a Dana 60 with 4.56 spool 35 spline axels,60fts are 1.44 looking for more.LOL
View attachment 66 Dart project Nov2010 216.jpg

 

[nqkjw]

But when i break this 8-3/4 again i am going to a dana 60..

Must be a few of us with that plan!!!

 

[70aarcuda]

how much abuse can 30 spline axeles take changing my ring and pinion to 4.30s has a 30 spline spool with factory axeles noticed the ends of the axele splines are starting to twist so im going to replace them with doctor diff axeles do i need to buy a 35 spline spool and 35 spline axeles hate to buy another spool . 2800lb Duster 600 hp give or take 3800 stall

35 splines are going to be stronger, you can easily sell the 30 spline spool...

I have been using Doctor Diff 30 spline axles in two cars, one is going on 5 yrs...the other is in it 2 season.

and one other car has 35 spline axles that have been in use since 1992....

 

[Locomotion]

35 spline will give peace of mind and last longer. Perhaps you can score a 35 spline spool for sale.

35 spline 8 3/4" and Dana 60 axles are the same thing, except for length requirements. The ring & pinions are the weak link in an 8 3/4" so the Dana 60 will be a huge improvement in that respect as well as having a much stronger housing.

You have a PM.

 

[Guitar Jones]

I twisted Moser axels with 4.30 gear and spool behind my 3000lb car with about 525hp.60fts were 1.50.Now have a Dana 60 with 4.56 spool 35 spline axels,60fts are 1.44 looking for more.LOL
View attachment 313458

I thought those were Strange axles you twisted. That's actually common for them, they twist a little and then take a set.

I twisted the stock 30 spline axles in my 4 speed Duster, went to Moser 30 splines and have been using them ever since but I also switched to an automatic. I had those axles in the Duster running mid 10's for over 15 years. I had them shortened and resplined and they are still in use in the Scamp.