View Full Version : 3/4 ton Dana 44 HD vs. 3/4 ton 10 bolt Corp.?

04-26-2007, 07:54 AM
I found out my 3/4 ton front diff is not a corporate 10 bolt but a 3/4 ton Dana 44 HD (1975). The 10 bolt corp. did not come out until around 1977. So what is better: Dana 44 HD or 10 bolt corp? Whats the difference? How much better is a Dana 60 compared to the Dana 44? I was told to throw in front dana 60 rather go with the 10 bolt corp. But now I find out I have the dana 44 HD.:confused0006:

04-26-2007, 08:03 AM
if your gonna drop in a big block do it right the first time and get the 60

04-26-2007, 08:26 AM
Sounds like you have an 8-lug external-hub D44.

The shitty part is the locking hubs are expensive, and the bolts that hold them on can back out, or fatigue and break.

IMO if you have it complete, run it. If/when it breaks you can swap on the later internal-hub outers.

In The Zone
04-26-2007, 09:23 AM
strength wise very similar not worth swapping in a 10 bolt.....

I have 2 extra sets of external hubs for that diff... as well as other assorted crap to go with it ..

i pulled mine and swaped in a Kp d60

04-26-2007, 12:14 PM
60's are very tough axles, they are also very expensive - so are the parts. I pulled my corp 10 OUT to put in a d44; It was in better condition, manual hubs, matching gears to my rear, etc etc...and I was putting springs in so I said "eeehhyy" <fonzie voice>

with 38s I don't think you will have too many issues.

04-26-2007, 01:19 PM
GM started using the Corp 10 midway in 1978. Unless you have the Extra Cash for a Dana 60 stick with the Dana 44... Oh and if it is an external hub 44HD it will have Flat Top Knuckles so you can do high steer if needed. [cheers]

m j
04-26-2007, 01:50 PM
the d44 was the prefered axle, people used to pull the 10 bolts and replace them with d44s
you couldnt get lockers for the 10 bolt like you can now

04-27-2007, 06:03 AM
Oh and if it is an external hub 44HD it will have Flat Top Knuckles so you can do high steer if needed.

What do the flat top knuckles look like? So far it appears to be the external hub 44HD. Any pics pls?

04-27-2007, 09:07 AM
Flat top on the right.

FWIW, the 44HD term only applies to some of the old closed-knuckle 8-lug versions.

All D44s with disc brakes are wimpy non-HD shit... doesn't matter if its 5, 6, or 8-lug or internal/external hubs. Internal hubs are a stronger setup anyways.

04-27-2007, 11:18 AM
i run a 10bolt front, shes broken and im replacing with a 10 bolt. Both are about the same strength, its was just easier for me to find a 4.10 10 bolt.

Neither are comparable to a 60, but niether are the prices.

04-27-2007, 11:47 AM
Here are some more pics from my stuff. The pics are all of the passenger side.




04-27-2007, 12:00 PM
Some More

Left Side (Drivers)

Right Side (Passengers)

04-27-2007, 12:09 PM
Right Side (Passengers) Flat Top Knuckle machined, drilled, and tapped.


04-28-2007, 06:41 AM
Great pics. I definetly have flat tops[36]

So... I guess getting the 3 holes machined is the first step for a high steer? How much moola?