Diff swap to Guilia Sprint - Alfa Romeo Bulletin Board & Forums
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 02-17-2017, 08:35 AM Thread Starter
Registered User
 
Stavri's Avatar
 
Join Date: Sep 2005
Location: New Hope, PA
Posts: 161
Diff swap to Guilia Sprint

Anyone know if a 1600 Duetto 9/41 would work in a 1963 1600 Giulia Sprint 1600?
thanks!

1969 Alfa Spider, 1954 Porsche Speedster,
1962 Ferrari 250 GTE, 1962 MGA MKII,2004 BMW M3
Stavri is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 02-17-2017, 08:41 AM
Registered User
 
Mound Dawg's Avatar
 
Join Date: Jun 2008
Location: Running through the ruins, all directions wrong.
Posts: 1,821
Garage
Yes, should be a straight swap.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

We're gonna make you an Alfa you can't refuse.
Mound Dawg is offline  
post #3 of 6 (permalink) Old 02-17-2017, 08:52 AM
Registered User
 
Alfajay's Avatar
 
Join Date: Jan 2005
Location: San Juan Capistrano
Posts: 7,919
I disagree with Mound Dawg. A 1963 1600 Giulia Sprint 1600 is a 101 series car, while a 1600 Duetto is a 105 series. The 101's have their spring mounts welded to the tops of the axle tubes, while the spring mounts are on the trailing arms of a 105. The trailing arm mounts and attachment for the "T" arm were also changed between the 101 and 105 series.

You can do this conversion by cutting that hardware off your 101 axle assembly, and welding it onto the later axle. But no, it isn't a bolt-in.

Jay Mackro
San Juan Capistrano, CA

'63 Guilia spider
'65 Guilia Sprint GT
'67 Duetto
'91 164L

Last edited by Alfajay; 02-17-2017 at 09:02 AM.
Alfajay is offline  
 
post #4 of 6 (permalink) Old 02-17-2017, 09:10 AM
Registered User
 
Mound Dawg's Avatar
 
Join Date: Jun 2008
Location: Running through the ruins, all directions wrong.
Posts: 1,821
Garage
He asked about a diff swap and mentioned the crownwheel and pinon size so I assumed that he was looking to put the 9/41 into his Sprint casing not swapping the whole axle or casing over. The exterior fittings are different but the internals are the same.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

We're gonna make you an Alfa you can't refuse.
Mound Dawg is offline  
post #5 of 6 (permalink) Old 02-17-2017, 09:50 AM
Registered User
 
Alfajay's Avatar
 
Join Date: Jan 2005
Location: San Juan Capistrano
Posts: 7,919
Quote:
Originally Posted by Mound Dawg View Post
He asked about a diff swap and mentioned the crownwheel and pinon size so I assumed that he was looking to put the 9/41 into his Sprint casing not swapping the whole axle or casing over. The exterior fittings are different but the internals are the same.
Ah, I see what you are saying. Yes, I agree that you could swap the 9/41 "guts" from a 105 differential into a 101 housing. You would probably do this if your 101 was a normale with a 5.12 ratio.

But swapping differential internals is difficult. You need to shim the gears in three dimensions and they must be positioned quite accurately to avoid noise and wear. This is not a job for a home mechanic. It is a lot easier to just swap an entire rear axle assembly, even if that requires cutting, welding, adapting.

Jay Mackro
San Juan Capistrano, CA

'63 Guilia spider
'65 Guilia Sprint GT
'67 Duetto
'91 164L
Alfajay is offline  
post #6 of 6 (permalink) Old 02-17-2017, 10:13 AM Thread Starter
Registered User
 
Stavri's Avatar
 
Join Date: Sep 2005
Location: New Hope, PA
Posts: 161
Quote:
Originally Posted by Mound Dawg View Post
He asked about a diff swap and mentioned the crownwheel and pinon size so I assumed that he was looking to put the 9/41 into his Sprint casing not swapping the whole axle or casing over. The exterior fittings are different but the internals are the same.
Thanks. That's what I was looking for.
Steve

1969 Alfa Spider, 1954 Porsche Speedster,
1962 Ferrari 250 GTE, 1962 MGA MKII,2004 BMW M3
Stavri is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Alfa Romeo Bulletin Board & Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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

 
Replace with
For the best viewing experience please update your browser to Google Chrome