Club Cobra Keith Craft Racing  

Go Back   Club Cobra > Manufacturers, Engine Builders, tools, and parts. > Classic Roadsters II

Keith Craft Racing
Nevada Classics
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
Keith Craft Racing
Advertise at CC
Banner Ad Rates
MMG Superformance
Keith Craft Racing
MMG Superformance
March 2024
S M T W T F S
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31            

Kirkham Motorsports

Like Tree5Likes
  • 1 Post By eschaider
  • 1 Post By joyridin'
  • 1 Post By Gaz64
  • 2 Post By Cruisin428

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 08-26-2019, 10:22 AM
TX-Excalibur's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2018
Location: Copeville, TX
Cobra Make, Engine: 1993 Excalibur Cobra, 351W 400hp+
Posts: 45
Send a message via AIM to TX-Excalibur Send a message via MSN to TX-Excalibur Send a message via Yahoo to TX-Excalibur
Not Ranked     
Default Ford 9 inch center section worn out

Have a Ford 9 inch positrac 28 spline 3.70 that has over 1/2 inch play in the ring and pinion. Upon inspection found that previous owner must have neglected the gear oil. Weighing new replacement vs rebuild. Need advice from members on which way to go.
Reply With Quote
  #2 (permalink)  
Old 08-26-2019, 11:17 AM
eschaider's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2006
Location: Gilroy, CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,628
Not Ranked     
Default

Just get a new ring & pinion and replace the bearings.


Ed
moore_rb likes this.
__________________


Help them do what they would have done if they had known what they could do.
Reply With Quote
  #3 (permalink)  
Old 08-26-2019, 12:11 PM
CC Member
Visit my Photo Gallery

 
Join Date: Aug 2010
Location: San Antonio Valley Ca, ca
Cobra Make, Engine:
Posts: 1,275
Not Ranked     
Default

Rebuilt is a custom hands on unit. Most any rear end shop will have the parts on the shelf.
Reply With Quote
  #4 (permalink)  
Old 08-26-2019, 01:24 PM
TX-Excalibur's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2018
Location: Copeville, TX
Cobra Make, Engine: 1993 Excalibur Cobra, 351W 400hp+
Posts: 45
Send a message via AIM to TX-Excalibur Send a message via MSN to TX-Excalibur Send a message via Yahoo to TX-Excalibur
Not Ranked     
Default

What is everyone's opinion of Speedway Motors regarding their rebuilt 3rd members? They are advertising 9 Inch Ford Third Member posi Assembly, 28 Spline, 3.70:1 $899.99 reduced from $1,199.99 rebuilt with a Currie CE-4026C Ford "N" nodular iron carrier housing and then install bearings, seals, a heavy duty "Daytona" pinion support, a 1310-series yoke. After applying promo code the price is reduced to $675. What do you think?

Last edited by TX-Excalibur; 08-26-2019 at 01:59 PM..
Reply With Quote
  #5 (permalink)  
Old 08-26-2019, 01:36 PM
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2012
Location: Katy, Tx
Cobra Make, Engine: ERA#134 427 Ctr oiler 2x4's
Posts: 50
Not Ranked     
Default

Sounds like a screaming deal! I'd go for it.
Reply With Quote
  #6 (permalink)  
Old 08-26-2019, 01:40 PM
TX-Excalibur's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2018
Location: Copeville, TX
Cobra Make, Engine: 1993 Excalibur Cobra, 351W 400hp+
Posts: 45
Send a message via AIM to TX-Excalibur Send a message via MSN to TX-Excalibur Send a message via Yahoo to TX-Excalibur
Not Ranked     
Default

Thanks eschaider, I would love to do this myself but I am not setup for it and will have to depend on a shop to do the rebuild. One place quoted me $1500 parts and labor which made me look more into replacing the unit as an assembly.

Last edited by TX-Excalibur; 08-26-2019 at 01:46 PM..
Reply With Quote
  #7 (permalink)  
Old 08-26-2019, 04:02 PM
eschaider's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2006
Location: Gilroy, CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,628
Not Ranked     
Default

You're getting ripped off!

Go check the price of ring & pinions from Strange, Ford etc on Summit. Price out bearings, gaskets and seals are cheap. Ask around and a couple hundred dollars would be highway robbery for setup.

The alternative is learn how to do it yourself. Buying parts and tools for yourself would be waaaaaay less expensive.

I have a short 6 page pdf file that will show you how but unbelievably it is too big to upload to the site. PM me an email address and I will send it to you.

Alternatively, write a check bigger than you want to.


Ed
__________________


Help them do what they would have done if they had known what they could do.
Reply With Quote
  #8 (permalink)  
Old 08-27-2019, 03:45 PM
joyridin''s Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2009
Posts: 1,689
Not Ranked     
Default

Quote:
Originally Posted by TX-Excalibur View Post
What is everyone's opinion of Speedway Motors regarding their rebuilt 3rd members? They are advertising 9 Inch Ford Third Member posi Assembly, 28 Spline, 3.70:1 $899.99 reduced from $1,199.99 rebuilt with a Currie CE-4026C Ford "N" nodular iron carrier housing and then install bearings, seals, a heavy duty "Daytona" pinion support, a 1310-series yoke. After applying promo code the price is reduced to $675. What do you think?
Sounds like a really good deal! For the price that it would cost you to do it yourself, just buy the unit.
TX-Excalibur likes this.

Last edited by joyridin'; 08-28-2019 at 04:32 AM..
Reply With Quote
  #9 (permalink)  
Old 08-27-2019, 04:54 PM
Gaz64's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2008
Location: Brisbane, QLD
Cobra Make, Engine:
Posts: 2,773
Not Ranked     
Default

Quote:
Originally Posted by joyridin' View Post
Sounds like a really good deal! For the price that is would cost you to do it yourself, just buy the unit.
That is a good deal. Jump on it.

Gary
TX-Excalibur likes this.
Reply With Quote
  #10 (permalink)  
Old 08-28-2019, 05:38 AM
CC Member
Visit my Photo Gallery

 
Join Date: Jun 2017
Location: Sacramento, Ca
Cobra Make, Engine: FFR 347
Posts: 38
Not Ranked     
Default

Ring and pinion 200.
Bearings and seals 150.
Posi 300.
Upgraded case 300.
Shop to put it together 200.
.............
Speedway looks good!
joyridin' and TX-Excalibur like this.

Last edited by Cruisin428; 08-28-2019 at 05:41 AM..
Reply With Quote
  #11 (permalink)  
Old 08-30-2019, 06:47 AM
TX-Excalibur's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2018
Location: Copeville, TX
Cobra Make, Engine: 1993 Excalibur Cobra, 351W 400hp+
Posts: 45
Send a message via AIM to TX-Excalibur Send a message via MSN to TX-Excalibur Send a message via Yahoo to TX-Excalibur
Not Ranked     
Default

Quote:
Originally Posted by Cruisin428 View Post
Ring and pinion 200.
Bearings and seals 150.
Posi 300.
Upgraded case 300.
Shop to put it together 200.
.............
Speedway looks good!
When I estimated the cost to do it myself your prices were pretty much in line with mine with only the labor quote of $500 being the difference. I went ahead and ordered the Speedway unit and it arrived Wednesday. I spent yesterday removing the old unit and plan to install the replacement unit today. I will be looking to sell the old unit for $300.

Last edited by TX-Excalibur; 08-30-2019 at 06:51 AM..
Reply With Quote
  #12 (permalink)  
Old 08-31-2019, 07:02 PM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2017
Location: Farmersville, Tx
Cobra Make, Engine: 302. 1992 build
Posts: 247
Not Ranked     
Default Rear end

Gary, if you need any help let me know .
Reply With Quote
  #13 (permalink)  
Old 09-01-2019, 06:00 AM
TX-Excalibur's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2018
Location: Copeville, TX
Cobra Make, Engine: 1993 Excalibur Cobra, 351W 400hp+
Posts: 45
Send a message via AIM to TX-Excalibur Send a message via MSN to TX-Excalibur Send a message via Yahoo to TX-Excalibur
Not Ranked     
Default

Quote:
Originally Posted by Bulldog View Post
Gary, if you need any help let me know .
Thanks Charles, I have ordered a transmission jack to support the weight of the assembly until I am able to get it into position. When it arrives I will give you a call and see if you are available. The nodular case is a lot heavier than the standard case that came out.
Reply With Quote
  #14 (permalink)  
Old 09-01-2019, 09:25 AM
cycleguy55's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,844
Not Ranked     
Default

Quote:
Originally Posted by TX-Excalibur View Post
Thanks Charles, I have ordered a transmission jack to support the weight of the assembly until I am able to get it into position. When it arrives I will give you a call and see if you are available. The nodular case is a lot heavier than the standard case that came out.
Speedway lists the nodular case assembly as the same weight as a regular case. Regardless - 78.55 pounds is a bit of work and no fun when you're laying on your back and trying to get it into position. Ask me how I know. LOL

I see that unit comes with a Richmond Powertrax Grip Pro differential, which they refer to as 'limited slip'. I'm sure you're already aware, but this is a helical gear torque-sensing differential, and the same unit I've been running for about 4 years. FWIW I think it's really good, and a great choice for a Cobra. BTW, I'm running Redline Synthetic SHOCKPROOF® gear oil in mine as there are no clutch packs to worry about.
__________________
Brian

Last edited by cycleguy55; 09-01-2019 at 09:34 AM..
Reply With Quote
  #15 (permalink)  
Old 09-01-2019, 09:31 AM
cycleguy55's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,844
Not Ranked     
Default

Quote:
Originally Posted by TX-Excalibur View Post
Have a Ford 9 inch positrac 28 spline 3.70 that has over 1/2 inch play in the ring and pinion. Upon inspection found that previous owner must have neglected the gear oil. Weighing new replacement vs rebuild. Need advice from members on which way to go.
While I recognize 'positrac' has become a generic term for a limited slip differential, it's really a term for GM's "Positraction" LS differentials.

Ford used 'Traction-Lok' or 'Trac-Lok' as their term for clutch pack type limited slip differentials. An earlier LS differential from Ford was 'Equa-Lock'.
__________________
Brian
Reply With Quote
  #16 (permalink)  
Old 09-02-2019, 08:18 AM
TX-Excalibur's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2018
Location: Copeville, TX
Cobra Make, Engine: 1993 Excalibur Cobra, 351W 400hp+
Posts: 45
Send a message via AIM to TX-Excalibur Send a message via MSN to TX-Excalibur Send a message via Yahoo to TX-Excalibur
Not Ranked     
Default

Quote:
Originally Posted by cycleguy55 View Post
Speedway lists the nodular case assembly as the same weight as a regular case. Regardless - 78.55 pounds is a bit of work and no fun when you're laying on your back and trying to get it into position. Ask me how I know. LOL

I see that unit comes with a Richmond Powertrax Grip Pro differential, which they refer to as 'limited slip'. I'm sure you're already aware, but this is a helical gear torque-sensing differential, and the same unit I've been running for about 4 years. FWIW I think it's really good, and a great choice for a Cobra. BTW, I'm running Redline Synthetic SHOCKPROOF® gear oil in mine as there are no clutch packs to worry about.
Thanks cycleguy55, the 78.55 lbs weight made me curious as I noticed a definite difference between the two assemblies. So I weighed them both to satisfy my curiosity and found that the rebuilt assembly with the nodular case weighed about 7 lbs more than the old assembly. It may not seem like much but when you are trying to lift that baby into position using only your arm strength, for me it was noticeably heavier.
Reply With Quote
  #17 (permalink)  
Old 09-02-2019, 03:35 PM
cycleguy55's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,844
Not Ranked     
Default

Quote:
Originally Posted by TX-Excalibur View Post
Thanks cycleguy55, the 78.55 lbs weight made me curious as I noticed a definite difference between the two assemblies. So I weighed them both to satisfy my curiosity and found that the rebuilt assembly with the nodular case weighed about 7 lbs more than the old assembly. It may not seem like much but when you are trying to lift that baby into position using only your arm strength, for me it was noticeably heavier.
What, a vendor's listings and specifications aren't 100% accurate? I'm shocked.

I've installed a 9" center section a couple of times using nothing but arm strength, and neither installation was a lot of fun.
__________________
Brian
Reply With Quote
  #18 (permalink)  
Old 09-02-2019, 04:24 PM
Gaz64's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2008
Location: Brisbane, QLD
Cobra Make, Engine:
Posts: 2,773
Not Ranked     
Default

Quote:
Originally Posted by cycleguy55 View Post
What, a vendor's listings and specifications aren't 100% accurate? I'm shocked.

I've installed a 9" center section a couple of times using nothing but arm strength, and neither installation was a lot of fun.
Yes, they are heavy, especially on your own, almost as heavy as some transmissions.

So much fun having a diff centre or trans sit on your chest.

Gary
Reply With Quote
Reply

Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 03:56 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy
Links monetized by VigLink