I finally found an 8 3/4 truck rearend to install in my 88 D100 beater truck, and it has the standard 5 on 4.5 bolt pattern. Can I just swap the rotor/hub assembly on the front to match? I am hoping to maybe just use the 11.75 rotor stuff from a car to get away from the 5 inch bolt pattern if possible, and keep my same calipers and spindles. Has anyone done this in the past? Thanks for any suggestions.

While I haven't personally done it, I'm pretty sure it's just a matter of swapping rotors. '84 was the last year for the 5 on 4.5 bolt pattern. I briefly owned an '84 and any of the older rims fit just fine (I installed a set of those aluminum Cordoba rims on mine).


Rock Auto Linky

Thanks! Was the link to a rotor for an 84 pickup? The truck has factory 15" steel truck rallye wheels now, and I have some 15" Cop car wheels I would use if/when I do the swap. I'm wanting to put the 8 3/4 in it to be able to swap gears easily. The 9 1/4 in it now is a one legger with 2.45 Bonneville gears! The 8 3/4 I picked up has 3.55's in it, so that will help a bunch! I found it at the N. GA swap meet a few weeks ago, and picked it up for $55 drum to drum!

Yes, it's a link to an '84 rotor on rock auto. They're about $35 ea. There are several brands available from them.

Cop rims will fit. I ran those before switching to the 'Doba wheels.

$55 drum to drum? Cool score! What's it out of? C-bodies and B-body WAGONS share the same width axle as a truck, just need new pads welded on. A '76 PU I had I swapped in a 9 1/4 from a ' 77 C-body.

It's actually a sure enough 1/2 ton pickup rearend with the existing pads on top. It's out of a 68 model truck, so I will probably swap the big drum brakes that I have laying around from a C body onto it before I bolt it in. If the center register on the existing 9 1/4 ends up being the same as the axles in the 8 3/4, I may just swap those brakes over and redrill the drums to 4.5.

the 72-74 W100/150 used a truck 8 3/4 housing and the large 5 on 5.5 wbp same as the 85-93 d100/d150/w150 if you can source a set

the 82-84 d100/d150 brakes fit as well as any of the large 11x2.5 brakes off 9 1/4 truck or c-body.

FYI..some c-body 8 3/4 housing and axles lengths are the same as the truck 8 3/4 housing and axles when looking for donors.

of course you know I like to tub trucks so there are a few 8 3/4 housings that make that super easy to do. my 88 d100 has the A-body 8 3/4 tucking 12" rims 29x15x15 M/Ts and my 85 stepside has a 67-polara c-body 8 3/4 (same as E-body) tucking 10" rims with a 29x9.50x15

Thanks Scratch! The rearend I bought came out of a 68 D100, so it's the 4.5 bolt pattern. My cousin used to have a 74 Powerwagon with the 5.5 bolt pattern, but it's long since been deceased! Only thing left of it is the original 318 sittin in my basement....lol. So, when I get around to doing this, all I need is new 82-84 rotors, correct? They will work on my existing 88 spindles, right? The rear brakes I got figured out.