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Does anyone know what diff would fit in a vauxhall viva axle as i would like to change the gear ratio, Eg Morris, Mg?
rich201283 - 30/9/11 at 06:04 AM

Does anyone know what diff would fit in a vauxhall viva axle as i would like to change the gear ratio, Eg Morris, Mg?


AndyGT - 30/9/11 at 08:01 AM

Chevette cwp?


AndyGT - 30/9/11 at 08:02 AM

What ratio do you have now?

From interest, do you want to go higher or lower than standard?


rich201283 - 30/9/11 at 10:14 AM

I belive the diff is 4.125:1 - i want a lower ratio as it revs a buit high when cruising


r1_pete - 30/9/11 at 11:24 AM

The 1.6 Viva was 3.9 IIRC the 1.8 & 2.3 Firenza &Magnum were higher too


bmseven - 30/9/11 at 05:26 PM

There was a Magnum axle up for grabs the other day? Cant remember where JPSC?


rusty nuts - 30/9/11 at 06:42 PM

quote:
Originally posted by rich201283
I belive the diff is 4.125:1 - i want a lower ratio as it revs a buit high when cruising



You mean a higher diff ratio not lower for less revs at a given speed . the numbers may be lower but the ratio is higher. A five speed box would give less revs for a given speed but it would depend upon which engine you have as to if one is a straight fit . If you are using a Viva engine I don't know of any