Rear end noise

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MikeGreer
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Re: Rear end noise

Post by MikeGreer » Wed Aug 14, 2019 4:53 pm

Jody, based on tire size alone there isn't much difference, about 0.3 mph. Something else is responsible for your speed difference. Maybe there was a speedo swap, or tranny swap, I think different years had different drive gears for the speedometer. I think If it was the rear end, there would be more difference.
45 years with a spider, that's a long time
Restoring the '79 for the second time, you're never finished ;)
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vandor
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Re: Rear end noise

Post by vandor » Sat Aug 17, 2019 1:59 pm

jfarr wrote:
Sun Aug 11, 2019 8:59 am
I've noticed my speedo reads about 4mph slow at 60mph. I wonder if I don't actually have the stock diff in this car.
In my experience that is normal for a Spider, every time I measure a stock setup the speedo is optimistic.
Csaba
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'71 124 Spider, much modified
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Re: Rear end noise

Post by vandor » Sat Aug 17, 2019 2:00 pm

kgfiske wrote:
Sun Aug 11, 2019 8:48 am
The 4.1:1 differentials were used on the 124 Coupes.
AFAIK the Coupes used the same diff ratios as Spiders. 4.1 with the 1438 engines and 4.3 afterwards.
Csaba
Parts: http://www.autoricambi.us
Cars: http://italiancarclub.com/csaba/Fiat.html
'71 124 Spider, much modified
'72 124 Coupe, new project, ex-Pete, ex-Eli, ex-Jack car (all Mira members)
'73 124 Wagon, no floors
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