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4:11 Axle Question

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gfleduc

Number of posts : 182
Location : Kingwood Texas
Age : 63
Registration date : 2015-09-19

4:11 Axle Question

Post by gfleduc on Mon Jul 30, 2018 8:05 am

Does anyone have an original 4:11 axle in their van? If so would you mind answering a question?

Can you say what size Delco wheel cylinders came with your axle?

Going by the GM parts book I was expecting 13/16". I ordered aftermarket cylinders & the bolt pattern does not match my backing plates. Only the 1-1/16" cylinders match up, interestingly enough that 1-1/16" is not listed for the rears?! Note I have a '65 2nd Design...
Four reference photos included below:

Reference Axle ID



Backing plate showing bolt pattern



Wheel cylinder bolt patterns


GM Parts Book:

    Current date/time is Tue Dec 11, 2018 11:40 pm