Original Super 10 Differential build - CorvetteForum - Chevrolet Corvette Forum Discussion



C3 Tech/Performance
V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

Original Super 10 Differential build

Reply
 
 
 
Thread Tools Search this Thread
Old 06-09-2017, 10:10 PM   #1
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default Original Super 10 Differential build

This thread is part of my frame off resto mod project over in the C3 General section.......
As my plans evolved into bigger, more powerful drivetrain, I knew the weak link was going to be the rear end. I had already bought a 4.11 that was supposedly rebuilt and beefed up. Nice fresh paint and new inner axles made it look so nice 5yrs ago.
Many of us have been fooled by shiny new things....right?

So I increased my research here, on other forums and in several books/mags.
I had already bought a new set of Ft Wayne Clutch and Driveshaft 3" half shafts. New is better ....right?
Not necessarily so as the wall thickness of the tubing used in these is LESS than the stock 3" half shafts that came with the 75 Corvette automatic.....imagine that!

Having seen several vendors and several individual operations involved in the rear differential aftermarket, I chose Gary Ramadei. Many of you know Gary from this forum and also from DC forum. He is also on a couple of others. And he does a free lecture/demo at Corvettes at Carlisle every August. Plus he shares his info freely. Great guy all the way round. Hope to meet him in person this year.

Anyway.....after countless emails with questions, texts and late night calls, we decided that his Super 10 would be sufficient for my 383 stroker with a max of 600hp. Also included in this plan is a T56 trans and 12" rear rims with 300mm tire range.

So I started by finding a good useable differential case only as the innards are all going to be new. Found a good deal on ebay. Sent detailed pics to Gary after he told me what to look for first......
Got a new rear cover....the Muskegon HD one. Then we put the shopping list together for Tom's.
1350 based parts including new half shafts.
BTW....I am attaching this to the Van Steel offset rear TA with the coil over conversion and johnnie joint front bearing. QA1 coil overs also.

Gary has a small stockpile of NOS GM posi units that seem to be better than anything coming from outside the country. So I am getting one of those.
The front yoke will be the billet one for a 1350.

So now lets let Gary's pics do the talking....he sends a LOT.......
Attached Images
          
bmans vette is offline   Reply With Quote
Old 06-09-2017, 10:16 PM   #2
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default more pics

As you see he closely inspects and dry fits every piece. The vent tube did not pass so a new one will be added.
Btw...he will be adding a drain plug system also...
Attached Images
         
bmans vette is offline   Reply With Quote
Old 06-09-2017, 10:27 PM   #3
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default Now the actual machine work begins...

He has to make the new inner axles fit into the case.

From Gary:
Well I had some time so I decided to start by machining the posi case to accept the new larger 30 spline axles. This is not a precision machine job, I just need to increase the bore in 2 steps. The first step allows the splines to fit into the case, the 2nd step allows the journal area to also slide into the case. The reason is to allow the axles to be pushed in when setting up the axle endplay, they have to go past the cross shaft hole to allow the c-clips to be installed. I had a boring bar with a dull tip but it worked and I polished it inside afterwards, along with the bearing journal OD and RG flange. I will still go back over them when I go to install the RG.




NOTE: All machine work, polishing, and tuning is done BEFORE cyro treating. Something any kid in trade school learns when they are 13. To harden or cryo a part and then attempt a lot of machine work is not the way to do it.
Attached Images
          
bmans vette is offline   Reply With Quote
Old 06-09-2017, 10:29 PM   #4
GregS_72
CF Senior Member
 
GregS_72's Avatar
 
Member Since: Sep 2013
Location: St Louis MO http://1972corvetterestomod.blogspot.com/
Posts: 247
Thanked 8 Times in 7 Posts
Default

Gary did my Super10 as well... trailing arms too. He's great to work with for sure!
GregS_72 is offline   Reply With Quote
The Following User Says Thank You to GregS_72 For This Useful Post:
bmans vette (06-10-2017)
Old 06-09-2017, 10:36 PM   #5
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default

Back to the case after sandblasting and then treating it.......

Hi Dennis

So the blasting shop was back logged so I blasted the housing and cover in my cabinet, cost is about the same and I have it done. I cut the ears off so the axles will slide in place installing the c-clips. I have it etching now and will rinse it in 20 minutes. Tomorrow I'll come in and flame dry it to pull out the moisture in the iron, let it cool and apply the POR15, wait until it's tacky and shot my top coat- then let it all harden as one. While I am letting it setup I will get back to the posi work.
Attached Images
       
bmans vette is offline   Reply With Quote
Old 06-09-2017, 10:37 PM   #6
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default

Stay tuned.....
bmans vette is offline   Reply With Quote
Old 06-10-2017, 08:54 AM   #7
SteveG75
CF Senior Member
 
SteveG75's Avatar
 
Member Since: Jun 2000
Location: Lusby MD
Posts: 6,415
Thanked 35 Times in 31 Posts
Default

Gary did my 12 bolt, trailing arms, and steering box. Well worth the $$$.
SteveG75 is offline   Reply With Quote
The Following User Says Thank You to SteveG75 For This Useful Post:
bmans vette (06-10-2017)
Old 06-10-2017, 09:23 AM   #8
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default This mornings updates.....

Good morning gang.....latest pics and narrative from Gary.
Just love the man's attention to detail and communication with me.

I better get out to the shop or there will not be a frame to mount this on....lol.

From Gary....
So far this morning I have your parts flame dried and cooling. Then I'll POR15 and shoot them. I etched and rinsed them last night. I blew them off and today they looked great, nothing to tell there was moisture in them. Once I put flame to them the moisture came out. This is another little trick I do that others don't but seems to work great.
Attached Images
    

Last edited by bmans vette; 06-10-2017 at 09:23 AM.
bmans vette is offline   Reply With Quote
Old 06-10-2017, 10:08 AM   #9
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default Now with the POR15 black base coat

Here are pics of the case with POR15 applied. Gary topcoats with Seymour Cast Blast spray can while the POR15 is still sticky. I have done that but did 2 coats of POR15..... a little overkill....haha


From Gary
Here is you diff with the POR15 applied. My approach to finish is to make it better then just a quick cheap paint job. So I do the blasting, etching, POR15 and top coat and really think it's better then powder coating a box, diff or arms. Protects a lot better then just paint and doesn't cost anywhere cost to powder coat- which is also chip if hit.
Attached Images
  
bmans vette is offline   Reply With Quote
Old 06-10-2017, 11:05 AM   #10
super charged
CF Member
 
Member Since: Feb 2017
Posts: 69
Thanks: 0
Thanked 9 Times in 9 Posts
Default

Looks like my super duper 10 bolt
super charged is offline   Reply With Quote
The Following User Says Thank You to super charged For This Useful Post:
bmans vette (06-10-2017)
Old 06-10-2017, 01:26 PM   #11
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default Looks like when Gary gets hold of your diff, he goes to town!

More pics folks.
Starting with the finished look of the case after spraying with Cast Blast.
Attached Images
   
bmans vette is offline   Reply With Quote
The Following User Says Thank You to bmans vette For This Useful Post:
EarlyC34me (07-04-2017)
Old 06-10-2017, 01:29 PM   #12
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default Now for the polished posi case....this is 4hrs labor right here.

From Gary

Hi Dennis

Well I just finished up your posi polishing work. This took me 4 hours and you can see why. This is the best polished vette posi on the market, bar none. Most rebuilders don't even do this work, the ones that claim to sure don't come close to one of these. Now if you plan on doing your others at home you can do it. This is not rocket science by any means, a good head porting kit will work. I have many more tools to use since ALL my diff's come with a posi polished like this. To me it just doesn't make sense not to do it, guys drop 1000's on engines and ignore the diff work needed or go someone who claims to do this and clearly does not. Another thing, get yourself good PPE- a respirator, goggles, and hearing protection. It is not only unsafe not to protect yourself it's just plain stupid and who wants stupid working on a vette?
Attached Images
        
bmans vette is offline   Reply With Quote
Old 06-10-2017, 01:35 PM   #13
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default Check the detail of polishing the cross bolt and pin area.

Couple of pics of the cross bolt and pin area after polishing.
He sets the retaining pin deeper. I'll show you that next.
Attached Images
  
bmans vette is offline   Reply With Quote
Old 06-10-2017, 01:39 PM   #14
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default Milling the case and setting retaining pin deeper

Back to the posi for some serious millwork.

From Gary

Dennis,

One thing the Eaton cases all had issue with, from '65 to present after market, is the cross shaft bolt depth into the case. I have seen the bolts break and some break out the side of the case. This case is a NOS GM 3 series, now obsolete from GM, that I selected for you but it has the same issue. So I set it up in the Bridgeport, one of my favorite machines- I was Bridgeport rebuilder when I was 18 covering MA and CT. I milled the pad deeper to give additional support to the shaft. I do this on every build as well. When using ARP Ring Gear bolts, you have to countersink the hole, especially on the older posi cases. Again I use ARP on every build because why go stupid to save $30 and use plain fully thread kit bolts?? I guess I would if I wanted to rip you off I could charge you and not tell you but that's not what I'm about and you get all the pictures of your build.

Counter sinking the holes for the ARP bolts first
Attached Images
   
bmans vette is offline   Reply With Quote
Old 06-10-2017, 01:44 PM   #15
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default Details on how the pin is set deeper and the machinery involved

Detailed pics showing how he mills the pad where the retaining pin goes into and holds the cross bolt. The extra depth prevents failure of the little pin that is the only thing holding the spider gears back.
A little extra insurance...
Attached Images
     
bmans vette is offline   Reply With Quote
Old 06-10-2017, 01:47 PM   #16
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default

Pretty impressive......

As my PA friends like to say.....

Are we having fun yet?

Thanks for watching.....much more to come.....

Bman
bmans vette is offline   Reply With Quote
Old 06-10-2017, 01:52 PM   #17
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default More pics of the pin fitting.

Forgot to show these pics
Attached Images
     
bmans vette is offline   Reply With Quote
Old 06-11-2017, 09:24 AM   #18
76Rat
CF Senior Member
 
76Rat's Avatar
 
Member Since: Jun 2013
Posts: 452
Thanked 31 Times in 27 Posts
Default

Coming along nicely. That is really nice of him to send you all the updates as it is being built.
76Rat is offline   Reply With Quote
The Following User Says Thank You to 76Rat For This Useful Post:
bmans vette (07-03-2017)
Old 06-11-2017, 12:07 PM   #19
bmans vette
CF Senior Member
Support Corvetteforum!
St. Jude Donor '12-'13, '15- '16-'17
Thread Starter
 
bmans vette's Avatar
 
Member Since: Nov 2006
Location: Athens GA
Posts: 16,887
Thanked 146 Times in 140 Posts
Default

Quote:
Originally Posted by 76Rat View Post
Coming along nicely. That is really nice of him to send you all the updates as it is being built.
Thanks. That is ONE of the great things about dealing with Gary. The man loves what he does and shares it freely in regards to the info. Most people get a boxed up package that looks a little different but they don't know the details.
And I hope that by showing this, others will appreciate what is involved in doing a precision job.
If I ever sell the car this is going in, I may have to take it out.....and keep it for the next one.

Txs for looking.

Anyone has any questions, feel free to post them up and I'll ask Gary. He is very reachable.

Bman (Dennis)
bmans vette is offline   Reply With Quote
Old 06-13-2017, 11:48 AM   #20
73racevette
CF Senior Member
 
Member Since: Jan 2016
Location: Reno Nevada
Posts: 123
Thanked 12 Times in 10 Posts
Default

Gary is the best I have found to help with a differential rebuild. He helped me with mine and many to most of the things he does no one else takes the time to do. He is going to get you a great product.
73racevette is offline   Reply With Quote
The Following User Says Thank You to 73racevette For This Useful Post:
bmans vette (06-26-2017)
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • Original Super 10 Differential build
  •  
     
    Reply

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    Ram Dual Disc & Flywheel Conversion KJL C4 ZR-1 Discussion 16 06-16-2017 07:41 AM
    1480 Tom's rear axle setup for sale! bmans vette C3 Parts for Sale/Wanted 11 12-07-2016 08:31 PM
    Anatomy of a faceplant: Inside the Libertarian Party's abysmal 2016 campaign Grumpy Politics, Religion & Controversy 59 10-18-2016 06:03 PM
    My Differential Rebuild Paper stinger12 C3 Tech/Performance 85 06-10-2016 10:05 PM
    FS in VA: 95 Coupe, highly modded Gary K C4s for Sale/Wanted 7 12-03-2008 04:06 PM


    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump


    All times are GMT -4. The time now is 02:45 PM.


     
    • Ask a Question
      Get answers from community experts
    Question Title:
    Description:
    Your question will be posted in: