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#1 (permalink) |
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Senior Member
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gear ration of a 1970 442?
i recently bought a 12 bolt rearend in a package deal got a gas tank rearend and front disc brake conversion kit for 400 bucks
i was wondering what was the gear ratio of a 1970 442 because i heard they were a limited slip differential and im getting ready to do my rearend i was thinking of 3.55 but i rather go with what the 442 originally had hope someone can help me out |
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#2 (permalink) |
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Member
Join Date: Jan 2007
Location: Texas
Posts: 55
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Most common was 3.23 with some 3.42 and as stiff as 3.91 in some 4-speed cars. Remove the cover and divide ring gear teeth number by pinion teeth number to see what you got.
Hope this helps
__________________
Dan S 70 442 W-30 4-speed 70 442 W-30 Post Coupe Bracket Race car..11.43 @ 3650lbs. |
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#3 (permalink) |
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Junior Member
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An easier way to figure out the ratio is if the axle is a posi turn the axle one full rotation and count the rotation of the pinion. If the differential is open then fix one side of the axle in place and turn the other side two full rotations again counting the rotation of the pinion. If the pinion turns three and a half rotations, your gears are 3.50 to 1. This is much easier than taking things apart.
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#4 (permalink) | |
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Moderator
Join Date: Mar 2007
Location: Northern VA
Posts: 1,162
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Quote:
As for available ratios, it could have been anything between 2.73:1 and 5.00:1.
__________________
Joe Padavano 64 Jetstar 88 Conv 66 442 L-69 Conv 68 W-30 69 H/O 69 442 70 W-30 72 442 86 Caprice wagon (w/307 Olds) |
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