bearing size

[maverickfe]

Hey how can you tell if you have a large or small bearing in your 9 inch rear end?

Thanks

[Whateverman]

- something i swiped from a mustang forum that might help-
Because of the two different size bearings used in the 9 inch, there are also two (actually three) different backing plate mounting patterns as well. The standard small bearing has an approximately 3 1/2" (horizontal)by 2" (vertical) pattern with 3/8 inch mounting hole diameter, while the large bearing is 3 1/2" by 2 3/8" respectively with 1/2 inch hole size. Some of the mid 70's Torinos used a slightly different plate with a spacing of 3 9/16" by 2" respectively with 3/8" hole size.

[67mann]

This image and whatevermans info comes from..... http://kevinstang.com/Ninecase.htm

[maverickfe]

thanks too the both of you too reply im thinking I have the smaller bearing on my 1967 F-100 4x4.