Cross shaft difference..

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Dec 18, 2004 | 10:43 PM

Hitch

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From: Clayton NC

Cross shaft difference..

I know that I've seen the thread before but I can't find it or remember the difference.. Could someone please jogg my memory on the difference between the SB and BB cross shafts.. Thanks.. Dave..

Dec 19, 2004 | 07:47 AM

DansYellow66

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From: Central Arkansas

Do you mean half shafts from Diff to trailing arms? If so the big block were supposedly shot peened when manufactured. How anyone can tell one from the other on almost 40 year old parts now, I don't know. Also, the U-joints on the Diff side are secured with machined caps instead of the usual straps.

Dec 19, 2004 | 07:56 AM

Hitch

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From: Clayton NC

I'm referencing the cross shaft for the clutch I guess a better name that I've heard it called is the "Z bar". I'm just not sure that I have the correct one installed for my SB...Dave.

Dec 19, 2004 | 09:47 AM

Denney

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From: 20 forward gears to shift through in MD

Quote:

Originally Posted by youwish2bme

I'm referencing the cross shaft for the clutch I guess a better name that I've heard it called is the "Z bar". I'm just not sure that I have the correct one installed for my SB...Dave.

Commonly referred to as the bell crank, the difference between the bb and the sb is the angle between the two arms. IIRC the angle between them on the big block version is slightly more than the sb (but can't recall the actual angle differences at the moment).

Dec 19, 2004 | 09:53 AM

JohnZ

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From: Washington Michigan

The angle between the two arms on the SB Z-Bar is 158*; if you place it on a flat surface and hold one arm parallel to the surface, the angle of the other arm will show as 22*. Dunno what the BB angle is - don't have one to measure.

Dec 19, 2004 | 10:04 AM

Denney

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From: 20 forward gears to shift through in MD

Quote:

Originally Posted by JohnZ

John, it's obvious that you need a bb mid year...

Dec 19, 2004 | 10:18 PM

Hitch

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From: Clayton NC

Thanks guys I'm thinking that I have a BB "Z" bar in my SB car.. the jury is out until I can pull it out and check it.. Dave..

Dec 20, 2004 | 01:16 AM

67L36Driver

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From: St. Joseph Mo

FFIW my car had a small block in it with a big block bell crank (it was that way when I bought it). I bought a SB bell crank but never used it. Now I have a BB in it.