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Old 12-27-2014, 10:02 PM
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blubomber blubomber is offline
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Join Date: May 2009
Location: Northern VA
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Default 69 GP rear end

you can find out the rear end on your car one of several ways.

1. get the PHS on the car and see what it came with
2. get the car up in the air and look on the axle housing on the left side. You may need to take a wire brush. You are looking for a two letter code. first letter is either "U" or "V"
V = posi-trac, U = open.
The second letter tells you the gear. Look in the service manual. Example UF = 3.08 open
Also the inside of the brake housing on the drivers side rear will have the code as well.
3. Get the car up and turn the wheels to count the revolutions on the shaft.

Yes, certain rear ends were std with certain engine packages. 428's usually got a higher gear. A 428 HO car with A/C would have likely had a 3.42 or 3.23 rear. I don't think a posi was std on anything. You had to order that.

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'69 Bonneville convertible
Warwick blue/ parchment interior
53 option accessories
2 more to go :-)