Posting here and in the For Sale section.
Does anyone know where these can be found? I have a differential (4.11) I need beefing up to handle @600hp.
I have Tom's outer axles and 3" half shafts already.
I have the 4.11 rear also and offset Van Steel TA.
Need to find the stub axles to go into the diff.

I will post in the For Sale in case any member has some.

But throwing this here in case anyone knows a vendor with some.

Txs

Dennis (Bman)

 

I saw these guys at the Goodguy's Event in Charlotte this past weekend-

Working on some neat stuff...

Ask for the Corvette Forum 10% off deal.

Vansteel-

https://www.vansteel.com/index.cfm?f...p=3032&ID=2672

 

Thanks Richard.

I bought their coil over offset trailing arms with johnnie joint front bearing from them for a great price.

Might just have to call them.

 

I got mine from Van Steel. Tracdogg2 can probably help you out as well.

 

Thanks Bill.

 

Tom's has those....

 

2nd for Tom's. That's where I got mine from.

 

Thanks guys!
I see them at the same price as Van Steel but it mentions 12 bolt conversion. Van Steel does not.
Did either/both of you go with the 30 spline and have to have a lot of modifying done to the case in order to complete the swap from the stock 17 spline to the HD 30 spline? I know the spider gears need changing.
Did you go all out and do a 12 bolt conversion at the same time?
And is that necessary in order to convert to the 30 spline setup?
Txs for any info.

Dennis

 

You can do the 30 spline inner axles but it requires machining to be done to the housing and carrier. If the gears you want to run are available for the 12 bolt conversion it is the way to go. The 12 bolt carrier is 4 times stronger than the 10 bolt. Running upgraded bearing caps is usually part of the process also. The stock cap uses a 7/16-14 thread, the upgraded part uses 1/2-13 threads. Tom states you only need to do left cap but Mike Dyer usually does both. I have a 12 bolt conversion thread started showing the caps and housing machined to accept the 12 bolt ring gear and 30 spline inner axles.Mike should be posting on the thread soon and will give specific details.

 

Thanks David.
If I read you correctly....I can still do this with my existing 4.11 rear end without changing to a 12 bolt carrier.
Correct?
I am building a 600hp project SBC. Not the torque numbers that a big block will produce or a 1000hp engine will produce.
Don't want to break the bank either.
Txs for your info.
Dennis

 

Dennis, I have the custom hardend 17 spline yokes from MidAmerica that i bought maybe 20 years ago. They look brand new on the last rebuild. They have survived broken posi cases where the cross pin elongating the cross pin hole. Until i found the tom's stage 7 posi units with a bigger cross pin. I also had 4.11 for over 20 years with richmond gears. The only mods I ever did was the billet main caps and I run 85w-140 Valvoline full syn power oil. Oh, the heavy duty rear end cover with a drain plug

I set the gear lash to have perfect forward and reverse contact. Richmond always seemed to have a whine under compression braking and i called them and they said it was normal.

I've had some u-joints eat up the needle bearings and end caps. I use spicer. The stock outers were a problem. I never broke one, but I took out a set that they had been hammer till they almost had a full tooth of rotation. I now use tom's outers.

The whole problem with a vet stock type rear end is the support or rather the lack of support. All you have is a the trailing arm and the lower Smart strut which is better than stock. the bending forces of going around a turn with wide rear tires puts tremendous pressure on the yoke shaft spline end on the posi cross pin. With a non hardened yoke, the yoke end wares away down to the c-clip and you have slop and failure. Once I went to the super yokes to would break the or crack the posi housing is why I went to the super toms posi units. I would have my foot on the floor out of a turn and just hear bad noises and limp home.

So I also learned to limit the rear wheel vertical travel (Squat) to keep the load off the posi pins. That is why I went to a 500+ rear spring years ago when I was doing the NHRA bracket drag racing series.

The real fix is to go to a 6 link with the upper arm and stiff spring and eliminate the thrust on the yoke ends and posi cross pin.

IMO my 17 super yoke has withstood more abuse than most have ever done to their Vette with mid 600 hp in both my 427 and 434 ci Motown block sbc with 12 inc rear road racing slicks

 

Yes you can set 10 bolt up to run the 30 spline inner axles. The cross shaft bore must be bored out to fit a 12 bolt pin due the spiders gears being 12 bolt parts. Most upgrade to the super ten package when going this route. The 30 spline inner uses a u joint flange on both ends of the half shaft unlike the stock with a u bolt for the inner. I am not sure if the half shafts are the same length but I can measure if you would like. Or you can call Tom or Mike, they will know. Pauldana had a nice thread on his super ten if you would like to do some research also. Mike encourages
cryo treatment and rem polishing for the super tens to help in the strength department.
Hope this helps,
Dave

 

Great info George.
Real practical experience.
I appreciate the breakdown.
You saw what my rear suspension plans are, right?
Van Steel offset TA with coil over setup and johnnie joint front bearing. Coil overs are QA1 single adjustable with 500# springs. Of course, I'll reinforce the crossmember above the diff.
Use solid spicer ujoints and 3" half shafts from Fort Wayne Clutch. Have Tom outer axles...the 1350 setup I got from Lurch here on the forum.
The only piece of the puzzle is what to do with the diff that I have now. 4.11 that was rebuilt but I have no documentation on it so I figure it will go to one of our resident rear end guys. I have done straight axle rear build but never a Vette IRS.
Plan on having the diff yokes hardened. In your opinion would having the Van Steel 17 splines hardened and polished, use the spool type ujoint brackets on the outside and replacing the posi main cap with the billet one be enough for my 600hp target? I will ask Gary Ramadei to look at doing his Super 10 setup if need be.
See anything I am missing?
Txs
Dennis

 

Thanks Dave. Same question as I just asked George.
Can I go with hardened 17 spline setup and basically do what I understand to be a Super10 setup? Or will I eventually need the 31 spline axles. I should also mention that this will be a 6spd stick with 10" rims and 295-305 rear tires. Spirited street driving, maybe a track time run but no autocrossing. Power Tour definitely.
Txs again for your input also
Dennis

 

I think that one company sells the hard 17 spline yokes to all the other vendors. Like I said If you can have the IRS near level and not have side thrust you will not have a problem

Some times I take off with my 335 rear tires and worry about a bad noise.... they still keep on ticking I see a blue haze in the rear view mirror.

IMO get good yokes a big pound spring and drive it hard till something breaks. when ever I had something break I went with better

 

Thanks....sounds like a plan.....