The Camaro Club (UK)

I am breaking a 1979 Camaro and have some parts on ebay. The car had the 4.2 litre straight 6 engine and was auto.

I was asked the rear axle ratio so I turned the end shaft and this turns 1.3 times for each 1 turn of the drum. This seems a very low number. Am I doing this right or is the figure correct.

If the axle's still on the car, jack the rear of the car up, chock the front wheels so's it doesn't roll & put the trans in neutral. Turn the rear wheel until the UJ on the front of the diff is pointing down (it doesn't really matter where it's pointing, so long as you can recognise it's exact position). Turn the wheel through one complete revolution & as you turn it count the number of times the UJ returns to it's starting point. If it turns 3 1/4 times then it's a 3.25-1 ration rear, 3 1/2 times it's a 3.50-1 etc etc. It would probably be either a 2.75-1 or a lowish 3.08-1 or 3.25-1 hth, cheers......Nige

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