Knuckle confirmation

Post by **Justin** » Wed Aug 26, 2015 6:29 pm

Guys, the knuckles on the '76-'77 Bronco axles are the same ones that are on the '78-'79 Bronco and '72-'79 F150, right? That's my recollection, and my google-fu appears to be malfunctioning.

Post by **phyler** » Wed Aug 26, 2015 7:40 pm

I don't think so. If I remember correctly where the tie rod mounts is in a slightly different position or thickness. That's what causes them to rub on 15" rims. Someone can correct me if I'm wrong though.

Post by **landshark** » Wed Aug 26, 2015 9:23 pm

Phyler is correct. The 76 and 77 knuckles where the tre mounts are slightly bent toward the tire where as the 78-79 are straight and slightly lower and just a bit beefier.

Post by **Justin** » Wed Aug 26, 2015 9:27 pm

Cool, thanks. Anyone able to provide the measurement between the center of the knuckle hole where the tire rod connects on the '76-'77 knuckles?

Post by **sykanr0ng** » Wed Aug 26, 2015 11:51 pm

landshark wrote:Phyler is correct. The 76 and 77 knuckles where the tre mounts are slightly bent toward the tire where as the 78-79 are straight and slightly lower and just a bit beefier.

Just to further confuse you the late '70s F150 SuperCab knuckle arms are about the same height as the '76-'77 Bronco knuckles but straight.

Duff makes a copy of them, and BCB sells the Duff knuckles as part of a disc conversion kit also.

Post by **landshark** » Thu Aug 27, 2015 8:12 am

Justin wrote:Cool, thanks. Anyone able to provide the measurement between the center of the knuckle hole where the tire rod connects on the '76-'77 knuckles?

Your looking for the measurement between each knuckle from the tie rod holes? I can do it tonight, Mike 76FB might be able to as well ;)

Post by **DanHall** » Thu Aug 27, 2015 3:40 pm

If I remember correctly the 78-79 knuckles also have more clearance around the axle.

Post by **sykanr0ng** » Thu Aug 27, 2015 5:35 pm

DanHall wrote:If I remember correctly the 78-79 knuckles also have more clearance around the axle.

All the disc brake knuckles have more clearance in the spindle hole than the drum knuckles.

The hole size is 4 1/8" vs. 3 1/4"

Post by **Justin** » Thu Aug 27, 2015 5:38 pm

landshark wrote:
Justin wrote:Cool, thanks. Anyone able to provide the measurement between the center of the knuckle hole where the tire rod connects on the '76-'77 knuckles?

Your looking for the measurement between each knuckle from the tie rod holes? I can do it tonight, Mike 76FB might be able to as well ;)

Yes, exactly.

Post by **landshark** » Thu Aug 27, 2015 5:53 pm

I'm not going to get over to the 76 until after the weekend.

Post by **Justin** » Thu Aug 27, 2015 6:24 pm

Whenever, it's not urgent. Thanks for being willing.

Post by **DanHall** » Thu Aug 27, 2015 7:37 pm

sykanr0ng wrote:
DanHall wrote:If I remember correctly the 78-79 knuckles also have more clearance around the axle.

All the disc brake knuckles have more clearance in the spindle hole than the drum knuckles.

The hole size is 4 1/8" vs. 3 1/4"

I thought the 78-79 were larger than the 75-77. Maybe not, it may have just been larger than the drums.

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