4:10 diff in 2L GTV - Page 2 - Alfa Romeo Bulletin Board & Forums
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post #16 of 35 (permalink) Old 06-24-2019, 03:35 PM
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West coast USA?

http://www.alfabb.com/bb/forums/alfa-romeo-club-canada-toronto-chapter/149533-alfa-parts-garage-sale.html
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post #17 of 35 (permalink) Old 06-24-2019, 04:45 PM
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I installed a 4.10 a few years ago in my 2000 GTV, and like the way it is more relaxed at highway speed. There are no hills worth talking about around here... I wouldn't go back.

Yves Boulanger
1974 2000GTV; 1982 GTV6 Balocco #194
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post #18 of 35 (permalink) Old 06-25-2019, 08:15 AM
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Beginning with the 1750's, 4.10 rear ends were oem standard for European model GTV's. Apparently, Alfa agreed with you.
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Jim . . . '72 Super 1300, '70, 1750GTV, 2nd series,
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post #19 of 35 (permalink) Old 06-25-2019, 08:42 AM Thread Starter
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Thanks all! I appreciate the various perspectives (but admittedly I have NO IDEA what guillotine is saying). I drove it again this morning and maybe I can get used to it : but first things first is to swap the rebuilt motor in and see how she goes. A front end rebuild is on tap for GTV as well as are cigarette seals and brake booster in the spider, and who knows what else! So much to do, I just need to stay motivated to tackle these.
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71 Spider 1750 BOMBER ; 1995 LS 78K tight fast car
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post #20 of 35 (permalink) Old 06-25-2019, 01:06 PM
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When I got my car, a 1600 Junior, but with a 2L engine, it had the 4.55 non-LSD axle. It was fun, but the ratio did seem to short for the motorway and it would go up through the gears like a demented puppy.

When I had a half shaft break, I took the opportunity to upgrade to a 4.1 LSD axle. The LSD is great - no more sitting spinning one wheel at junctions. The longer gearing has changed the character of the car - more grown up, better on the motorway, but still fun on the back rounds. The change even brought the speedometer closer to reality

I can see why some think the 4.3 is the optimum

1975 GT Junior with 2 litre lump
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post #21 of 35 (permalink) Old 06-26-2019, 03:21 AM
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When I got my car, a 1600 Junior, but with a 2L engine, it had the 4.55 non-LSD axle. It was fun, but the ratio did seem to short for the motorway and it would go up through the gears like a demented puppy.

When I had a half shaft break, I took the opportunity to upgrade to a 4.1 LSD axle. The LSD is great - no more sitting spinning one wheel at junctions. The longer gearing has changed the character of the car - more grown up, better on the motorway, but still fun on the back rounds. The change even brought the speedometer closer to reality

I can see why some think the 4.3 is the optimum
Exactly why I hunted for a 4.3 to go in my Ti Super Rep. I'd had virtually the same issue in a GT Junior with a 2 litre engine 11 years ago.

GTA R
1963 Giulia Ti Super Rep
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post #22 of 35 (permalink) Old 06-26-2019, 06:06 AM
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but first things first is to swap the rebuilt motor in and see how she goes.
Agree. 4.1 is great with a strong motor. I think that AR probably put 4.55 into US series 2 Spiders to compensate for the lack of power.

Ed Prytherch
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post #23 of 35 (permalink) Old 06-26-2019, 06:11 AM
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So as an aside many years ago I had a few 105's around, one of which was an old and tired 1750 Berlina. We called it the Bathtub. One thing led to another, for a while it ended up with a 2-litre engine with 1.3 Junior gearbox and the original 4.3 diff. As many will know the Junior gearbox has a lower (I think .83) 5th rather than the .79 of the larger engined cars. It also ran 195/60 14" tyres which we bought cheaply as 'blems' from a club member who owned a tyre shop and had access to cast offs from the local Dunlop plant. 'Blem' means 'blemish', i.e. 2nd quality but serviceable.

Anyway, I used that car as a tow car for our Junior track car that the gearbox came out of (we called that car the Rocket) and the combination was great. On the open road it would hum along really well with the Junior and tandem trailer on the back, with good mileage and hills were not an issue. Point is, small 'number' differences on paper can have a real impact in the real world.

Sorry for going a little off topic. Seemed related when I started typing .
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post #24 of 35 (permalink) Old 07-06-2019, 11:41 AM
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After doing a little mountain run near Malibu yesterday, it became apparent that the 4.10 needs to take a walk... anyone have a good 4.54 laying around?

Current Garage: 18' TRD Pro 4Runner (DD), 13' Ducati Hypermotard (Canyon Express), 74' GTV 2000 (Soon to be Outlaw'd) Work: www.trahanphoto.com
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post #25 of 35 (permalink) Old 07-06-2019, 04:31 PM
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After doing a little mountain run near Malibu yesterday, it became apparent that the 4.10 needs to take a walk... anyone have a good 4.54 laying around?
Having spent many an hour driving 2 litre GTV’s around mountain / twisty / hilly roads that sounds to me like your missing a few urgs in the go compartment. A 2 litre engine mit 4:1 should be able to pull up any incline at sea level without complaint.

Alister
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post #26 of 35 (permalink) Old 07-06-2019, 05:46 PM
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After doing a little mountain run near Malibu yesterday, it became apparent that the 4.10 needs to take a walk... anyone have a good 4.54 laying around?
To trade?

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post #27 of 35 (permalink) Old 07-06-2019, 05:58 PM
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I would venture to guess there was no real complaint from the 410'ed GTV in the mountains but rather just not the snap to be had from a 454.

The passenger seat is 15 miles an hour faster than the drivers seat.

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post #28 of 35 (permalink) Old 07-07-2019, 02:51 AM
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Hi

A slight diversion, apologies....but, may I ask the gear count for a 4.3 ratio? I'm guessing 10/43....

Thanks.

Richard
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post #29 of 35 (permalink) Old 07-08-2019, 08:02 AM
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Originally Posted by SouthBayGtv View Post
After doing a little mountain run near Malibu yesterday, it became apparent that the 4.10 needs to take a walk... anyone have a good 4.54 laying around?
When you find one, I'd be interested in buying your 4.10.

Mike
1969 GTV 1750
1966 Super
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post #30 of 35 (permalink) Old 07-08-2019, 11:04 AM
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Hi

A slight diversion, apologies....but, may I ask the gear count for a 4.3 ratio? I'm guessing 10/43....

Thanks.

Richard
Yes, 10/43.

-John
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