What rear axle

[Volksnut]

Okay I have a '63 D100 with the tapered axles, so I bought a '65 D100 rear axle for the e brake, but it has passenger car brakes? It has a tag with 3.55 which I know is the gear ratio. What rear axles do the D100's have, is it the 8 3/4"? How do you tell. If I want to change the brakes to discs or say just your average 8 3/4" brakes (if the 8 3/4 is what I even have) do the passenger car and trucks brakes interchange????

[PwrWgnDrvr]

All D100's have the 8 3/4 axle, 66 FSM says 11x2 drums. No other options.

[Volksnut]

All D100's have the 8 3/4 axle, 66 FSM says 11x2 drums. No other options.

Okay just making sure,I knew about the 11 x 2 as mine are 10 x 2 1/2 which I guess someone swapped the brakes on from a car. I asked a few vendors if there disc kits fit the Sweptline trucks with replays like "I don not know. It only fits the 8 3/4 or Dana 60 rear" and "none, we do not have a setup currently", so are the truck 8 3/4" different from say the passenger car 8 3/4" as far as fitment.

[Hobcobble]

I bought a 8.75" corporate axle from a '71 D100 Slant 6/727 out of a local boneyard.
It has 10" brakes/drums. Maybe you can locate some backing plates and brake drums.
The 10" drums are still available through most parts stores the last I knew.

John

[dodgeboykim]

Okay I have a '63 D100 with the tapered axles, so I bought a '65 D100 rear axle for the e brake, but it has passenger car brakes? It has a tag with 3.55 which I know is the gear ratio. What rear axles do the D100's have, is it the 8 3/4"? How do you tell. If I want to change the brakes to discs or say just your average 8 3/4" brakes (if the 8 3/4 is what I even have) do the passenger car and trucks brakes interchange????

Anything from the car brakes 8 3/4 will work. Disc Brake conversion or drum. Think the 9 1/4 stuff also fits.

[712edf]

1965 & 1968 D100 had 11x2
1970 had 10x2.5

Bucky

[my5thmopar]

What is the axle width drum to drum face. What is the spring pad width and are they on the top of axle tube. A picture would help.

[Volksnut]

What is the axle width drum to drum face. What is the spring pad width and are they on the top of axle tube. A picture would help.

64" drum to drum
43 1/2" spring pad width
Yes pads are top side of axle

[my5thmopar]

1965 & 1968 D100 had 11x2
1970 had 10x2.5

Bucky

I believe this is correct. I had an early I think 73/74 D100?that had the 8 3/4. That was about the time Mopar stopped with that axle. I also think the brakes are correct and still available. If you’re going to disk, than any kit for an 8 3/4 will work. Use it..,better than tapered. You just have to size rear disk correctly based on front disk size. The width leads me to think it’s 70-74. That’s my 2 cents. Craig

[Volksnut]

Craig, were the axles wider in '70? If so how much. Im going to keep the drums since there correct for the axle.

[my5thmopar]

Craig, were the axles wider in '70? If so how much. Im going to keep the drums since there correct for the axle.

One of the smart guys will chime in but, I read somewhere that the 72-93 were the same width. If yours is 64" drum face to drum face and you measure the tapered axle, you will find its slightly narrower. make sure you measure the drums and shoes, because no telling what got changed in 40-50 years. Nothing wrong with drums as long as you can get parts.

[PwrWgnDrvr]

Wouldn't it be more logical to measure backing plate to backing plate?
11x2 drums would be narrower than 10x2.5 but either could be installed on the same axle.....

[dodgeboykim]

Craig, were the axles wider in '70? If so how much. Im going to keep the drums since there correct for the axle.

Any rear diff from 61 to 93 will bolt in excluding minor issues. But some are not desirable.

[soopernaut]

The 72-74 truck housings are slightly wider than the earlier ones.