Transmission gear part numbers

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Transmission gear part numbers

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Topic: Transmission gear part numbers (Read 2504 times)

Fiatpwr
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Posts: 37

Transmission gear part numbers

« on: February 03, 2011, 12:18:41 AM »

I have a friend who has 2 131 reverse gears. One is tagged 4327424 for 75-78 The other is 4417999 for 79-82

One has 17T, one has 18T.

Does anyone know which is which? Thanks,

Jon


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\'78 Fiat 131, \'70 Otas
http://vt-stromer.smugmug.com/Other/1978-Fiat-131S/23227330_65KTt8

djape1977
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Posts: 1,835

Re: Transmission gear part numbers

« Reply #1 on: February 03, 2011, 08:36:28 AM »

both for 131/132/argenta gearbox
as declared, they're for diferent years, both for 5speed box. after 1978 or 79 fiat started making gearboxes with smaller teeth because they make less noise. parts are not interchangable for obvious reasons.
transmission ratios are pretty much the same.
never actually bothered to count the teeth on reverse gear but safe bet would be that one with 17teeth would be for older car, although who is to guarantee that gearbox wasn't swapped over the years?


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get a bigger hammer!

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