Early 750 drivshaft - Page 2 - Alfa Romeo Bulletin Board & Forums
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post #16 of 44 (permalink) Old 02-03-2019, 02:45 AM
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Really interesting thread. In my workshop I have a mid-1955 engine and gearbox alongside a '56 Spider engine and gearbox. The earlier one has the pawl as discussed, but both have 12mm holes in the 3-lobed spider.
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post #17 of 44 (permalink) Old 02-03-2019, 10:53 AM Thread Starter
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I am hoping to verify or disprove that Sprints ever had 10 mm bolts. If your 1955 gearbox from an earlier or later serial number than Alfabjorn55 00367?
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post #18 of 44 (permalink) Old 02-03-2019, 12:37 PM
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Later it's from Sprint 00555

I have that little pawl that Bjorn is looking for in my tunnel case stuff, It's in for reproducing now, I'll pop in and get some pictures of it for you

Ciao
Greig
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post #19 of 44 (permalink) Old 02-04-2019, 12:57 PM
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750 drive shaft

Bjorn,

you should check and see if the 10 mm transmission fork was installed on the floor shift model when it was changed to the floor shift. probably that's what happened long ago so that your drive shaft would line up.

Reed
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post #20 of 44 (permalink) Old 02-04-2019, 01:41 PM
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Sorry, I don't have the details of the floor shift replacement, but after having a closer look to the 10mm holes it seems like they are reduced from 12 to 10mm by bushings. I think they originally were 12mm, so that will probably explain the mystery!
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Giulia Sprint GT -65
Giulietta Sprint 750B -55
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post #21 of 44 (permalink) Old 02-04-2019, 01:57 PM
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Bushing seems logical. However, when comparing my two 12 mm and 10 mm ones, I noticed the holes were not centered. The 10mm hole is offset toward the inside. Maybe carl can post a picture showing this.

Reed
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post #22 of 44 (permalink) Old 02-05-2019, 10:50 AM Thread Starter
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10 mm vs 12 mm offset

This illustration shows the difference better than photograph.
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post #23 of 44 (permalink) Old 02-06-2019, 12:32 AM
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Carl,

The bolt circle both for my driveshaft (with 10mm bushings) and gearbox fork are 100mm.
Since 00367 were dismount in end of the -60s and floor shift gearbox sold, I can't guarantee that parts are original.
I was told that column shift box and driveline would be original, but who knows..

So perhaps I will remove the 10mm bushings and use "12mm system" including flex joint for all parts.

//Bjorn

Giulia Sprint GT -65
Giulietta Sprint 750B -55
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post #24 of 44 (permalink) Old 02-06-2019, 01:09 AM
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..just to clarify,
The gearbox fork has 12mm bolt holes
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Giulia Sprint GT -65
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post #25 of 44 (permalink) Old 02-06-2019, 09:58 AM Thread Starter
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Excellent quality photos. You made me go back and take a closer look at the two I had on my workbench. Neither has the mark near the spline teeth. One might have the caste mark on the outside; I would not have noticed it if I had not specifically been searching for it. Alfa (Borg-Warner) may have used multiple suppliers for the component.

I would go with the 12 mm bolts, which allows the standard, easily available flexible joint.
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post #26 of 44 (permalink) Old 03-26-2019, 10:49 AM
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Quote:
Originally Posted by carl750 View Post
Anybody have one of the very early front driveshaft sections in drawing ………. on the shelf or on a car?
Like this top one?
Frans
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1959 Alfa Romeo Giulietta Sprint Veloce,
1964 Alfa Romeo 1600 GT.
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post #27 of 44 (permalink) Old 03-26-2019, 12:27 PM Thread Starter
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I think you are replying to my very first post in this chain. All three in your photo have the fork permanently welded to the gearbox end of the front driveshaft, which is late 750 and all 101. At the time I was looking for the early 750 type which you will find a picture of in one of the later posts.
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post #28 of 44 (permalink) Old 04-05-2019, 01:23 AM
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Ciao a tutti dall'Italia !
With my great surprice and pleasure,finaly I found anther guy who have my same problem....Part 1365.24006 fits not only early Berlina but also Sprint (normale and veloce) up to car number 3200 and Spider up to car number 1201
I am the owner of a very early Sprint Veloce '56 and my gearbox has the same problem,i.e. the rare screw-on pawl missing. Please,would be possible make one for me too ?
Thank you so much,
Luca. [email protected]
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post #29 of 44 (permalink) Old 04-06-2019, 10:25 AM
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OK chaps, I visited my engineering guy and that little pawl is going into production next week - he's been busy with a few other projects.

I'm going to make 5 of them, no idea on the price yet, but it's usually reasonable for bespoke items in small runs. There are currently 3 guys that want, so I'll keep 2 on the shelf with the tunnel case stuff in case anyone else needs one

As soon as I have them, I'll post pictures and we can sort out shipping and addresses etc from there.

It's been a busy past 2 weeks rebuilding a friend's Austin 7 Ulster engine...

Ciao
Greig

Some 750's
Some 101's
Some 105's
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post #30 of 44 (permalink) Old 04-06-2019, 10:52 AM
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Ok! Please email me on [email protected] when all will be ready.
Saluti,Luca.
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