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- - What is the OEM rear axle ubolt size? (https://67-72chevytrucks.com/vboard/showthread.php?t=748851)

La Zona Imagery

10-20-2017 07:50 PM

What is the OEM rear axle ubolt size?

The ubolts on my truck are 5/8 inches. And they fit just right into the trailing arm holes.

I bought a lowering block kit, and the ubolts are 3/4 inches, which do not fit into my trailing arms holes.

So I am thinking either they sent me the wrong ubolts, or my trailing arms are not factory.

racecougar

10-20-2017 09:49 PM

Re: What is the OEM rear axle ubolt size?

3/4 x 3.5 x ...I don't recall the stock length off the top of my head...9" I think.

Captainfab

10-21-2017 01:09 AM

Re: What is the OEM rear axle ubolt size?

The correct u-bolt diameter is 3/4". There must be rust built up in the holes thru your trailing arms.

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