Alfa differential gear ratios - Page 4 - Alfa Romeo Bulletin Board & Forums
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post #46 of 51 (permalink) Old 02-13-2017, 08:43 PM
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Location: Loomis, CA USA
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green of blue

I have a 2 liter LSD axle sitting around. Trying to ID the ratio. No idea where it came from, Do you guys think this is the green or blue... Stared at it for a while and cannot decide....
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74 GTV (red) (rusty) (fun)
67 Super (white) (also rusty)
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post #47 of 51 (permalink) Old 02-14-2017, 05:41 AM
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Take the bottom cover off and count gear teeth!

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post #48 of 51 (permalink) Old 02-14-2017, 06:45 AM
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if LSD should be green, wich is 10/43 (4,3) ratio
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post #49 of 51 (permalink) Old 12-18-2017, 12:18 PM
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Got the rear diff disassembled in my 72 GT1300 - 4.56 ratio. Should be small rear diff, no LSD.

And ended up with complete 2L drivetrain from about the same year - it's a 512 block, 5 sp, 4.30 combo - assuming it's a 1972 GTV drivetrain. Should be the larger rear diff, but it's at the shop with the rest of my car and the small diff is here in my garage, so don't have them side by side to compare.


72 GTV; 66 Fairlane GT convt, 428, 4 sp; 68 GTO Convt, owner built 455 and TH400; 71 Javelin road race project, owner built 401, T10
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post #50 of 51 (permalink) Old 12-26-2017, 07:30 PM Thread Starter
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I'd call that green. Take care of that "white" mark on the pinion flange and the end of the driveshaft. That's important too.

......... Bud Feigel ........<Oo \*/ oO>....... Lexington, Kentucky ........
'82 RED GTV6 / 2.5 - '86 WHITE Spider Veloce 2000 - '71 GREEN GTV 1750
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post #51 of 51 (permalink) Old 03-09-2019, 08:42 PM
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I'm about to purchase a 1970 GTV 1750 Euro model from Japan.
Can some one may guess what ratio this car may come with.
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