How to identify BBP backing plates

[DusTed74]

How do you tell the difference between small bolt pattern and big bolt pattern rear backing plates off of an 8 3/4 ?


Thanks in advance...............Ted

 

[DusTed74]

Anybody ?????

 

[72ScampTramp]

I cant answer this question but, Why would they be different? Isnt it not the axle that dictates bolt pattern and not the backing plate?

 

[dgswinger]

difference is in the backspacing from the axle flange. using a straight edge across the back of the plate measure them... small bolt is roughly 1 1/4" backspacing and big bolt is roughly 1 3/4" see pics sorry they are crappy but should give you an idea what im taliking about hope this helps...

 

[4spdragtop]

Good info!

 

[DusTed74]

I knew it had to be in the back spacing. I just didn't have anything to compare to.
Thanks................Ted

 

[dgswinger]

I knew it had to be in the back spacing. I just didn't have anything to compare to.
Thanks................Ted

glad to help! your welcome!! its always nice to have a stock pile of extra parts around to either use or help with tech discussions.

 

[72bluNblu]

I cant answer this question but, Why would they be different? Isnt it not the axle that dictates bolt pattern and not the backing plate?

Yes, but SBP axles use a different brake offset than the BBP axles. So the backing plates are in fact specific to SBP or BBP axles.

difference is in the backspacing from the axle flange. using a straight edge across the back of the plate measure them... small bolt is roughly 1 1/4" backspacing and big bolt is roughly 1 3/4" see pics sorry they are crappy but should give you an idea what im taliking about hope this helps...

Great info! :thumbup: