Gearbox swap (4.55 and V6)? - Alfa Romeo Forum
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75 3.0 America

Hmmm Gearbox swap (4.55 and V6)?

I am new here. So far I've been reading your threads and it's very informative!

I have two 75's:
1.6 carbs and recently bought 3.0 V6.

I've heard of a gearbox swap, track users do it often. TS or Turbo gearbox can be put in V6, they all have LSD, similar torques, and there is no problem.
Is it posible to put a 4.55 gearbox from 1.6 to V6? Can this gearbox withstand the torque of V6? Drive ratios are same, except for the final drive. Since this is a non LSD is it posible to keep the present diff and is this compatible? What problems could arise?
My opinion is that this is the best low-cost upgrade to car's acceleration. Calculated top speed would be 181 kmh, but 0-100kmh could be just above 6 secs.
Any opinions?
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Re: Gearbox swap (4.55 and V6)?

1,6 do not have LSD, but the gearbox is up to the job, maybe with exeption of the clutch. but you may use the one from the 3.0 box.

Would be a beast on the track, but not for everyday driving I think
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Re: Gearbox swap (4.55 and V6)?

The 1.8 Turbo doesn't have an LSD either, IIRC. As most track drivers would rather have an LSD over better ratios (within reason) I wouldn't recommend swapping a 3.0 liter box for a 1.6 one.
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