Anyone know the difference between an auto and a manual diff ? I read somewhere that the auto diff was a good match to the 5 speed ???
Any clues...
Baz
Diff performance
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Baz
- Posts: 229
- Joined: Thu Mar 20, 2008 4:36 pm
- Your car is a: 1977 Fiat Spider
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lanciahf
Re: Diff performance
Diff Gear Ratios are different.
Around 3.50 to 1 for the auto diff.
3.90 for 79 to 85.5 spiders - Manual
4.30 to 1 for mid seventies spiders 74 to 78?
4.10 for early spiders.
Around 3.50 to 1 for the auto diff.
3.90 for 79 to 85.5 spiders - Manual
4.30 to 1 for mid seventies spiders 74 to 78?
4.10 for early spiders.
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mdrburchette
- Posts: 5754
- Joined: Wed Jan 25, 2006 5:49 am
- Your car is a: 1972 Fiat 124 Sport
- Location: Winston-Salem, NC
Re: Diff performance
4.30 for 71-73 also.lanciahf wrote: 4.30 to 1 for mid seventies spiders 74 to 78?
4.10 for early spiders.
1972 124 Spider (Don)
1971 124 Spider (Juan)
1986 Bertone X19 (Blue)
1978 124 Spider Lemons racer
1974 X19 SCCA racer (Paul)
2012 500 Prima Edizione #19 (Mini Rossa)
Ever changing count of parts cars....It's a disease!
1971 124 Spider (Juan)
1986 Bertone X19 (Blue)
1978 124 Spider Lemons racer
1974 X19 SCCA racer (Paul)
2012 500 Prima Edizione #19 (Mini Rossa)
Ever changing count of parts cars....It's a disease!
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spiderrey
- Posts: 2623
- Joined: Sat Jan 28, 2006 2:08 pm
- Your car is a: 70 124 spider-74x19-03 ranger edge
- Location: San Dimas, Ca
Re: Diff performance
my 70 had 411,s, now it has the autos 354,s, and im running a 5 speed. everyone one said i was nuts, but i did it anyway. im happy with it. of course i have a built 2 liter to make those gears workable. dosent take much pedal to cruise the fwy at 70 with this set up. i know one day a while back i had the car at about 125 mph on the fwy. and there was more left in it. this things a dream at high speeds, and still has very good low end torque.