Dana 27 to 30 with disc?

So i found a narrow track dana 30 with disc brakes the other day. to swap into my 67 with the dauntless v6, and offset 44 rear.

My 27 wont stop worth a damn. kingpin bearings are going or something as the front passenger tire wobbles around when its off the ground. so basically i figured this is the time to swap

Everything looks fairly easy to do, i need to weld some spring perches on it, and clean it up. but my main questions are.

• the offset rear 44. I remember reading somewhere that it would have been a 5.38 gearing? is that stock in 67?
• Any way to swap gearing from the dana 27 over to to the 30? everything looks so similar!
• how about the warn hubs on my 27? will they replace the stock 30 ones?
• other options? maybe just fix the 27 and somehow swap over the disk brakes?
• are the dana 44 gears the same as the newer ones? could i just swap out those ones for a matching gears to the 30 easier?

Keep in mind i want to do this as cheaply as possible. I bought the 30 for 150 bucks without even thinking about gearing. I was just excited i found one.

thanks a million for any help

 

If your axles are stock to your v6 jeep you should have 4.88s or 3.73 gears. The dana 27 gears will not fit the 30 axle. Why spring perches or are they cut off? The dana 30 is so superior to the 27 I would never consider taking those disk off the axle to put them on your 27. Just find some used gears for the 30 to match your rear sand go from there. I did mine for about $250 total, used gears, rebuild kit and made new spring plates to match right. You can drill out the 27 plates but they get thin and don't match up perfect but are useable. The dana 30 probably has crappy gears match the 30 to the 44 not the other way around.
Updating your steering to match the 30 axle will cost a little, your tie rod tubes will need to be replaced due to length differences.

 

Where the **** did you find used 4.88's for a 30?
The cost of gears and a new differential are the main reason I'm still running the stock 27...

 

Housing is bent . Looking at other options I found the whole brake set up from the 30 will bolt to the 27. Its the 1-1/4 rotor. Anyone know where I can find a writeup on this? Everything I can find is using tthe chevy backing plates and calipers.

 

Ahh, you assumed I had 4.88s, mine are 3.73s.

 

Uhh, you found the whole setup from the 30 will bolt up to the 27 but then are asking for a writeup? Where did you get your info? It can be bolted up with other work, but is not a simple bolt up. There are other things that need done like spacing the hubs properly so the rotors line up with the calipers.
Other things too.

 

In my endless googleing, i found one or 2 mentions that the whole disc set up from the knuckle out, from a 77-78ish dana 30, will bolt to the dana 27 with some work. They refferenced a writeup but it was a dead link.

Everything i can find is using chevy calipers...

 

I think you better reread wherever you saw that. Or maybe you don't understand which parts have what names.

Usually when they say "knuckle out" it's from one Dana 30 to another. Before '77 the Dana 30 in CJs had drum brakes, and the easiest way to convert them to disk is to take the knuckles-out from another Dana 30 with disk brakes. The knuckle starts at the king pin (or ball joints on a 30) and you can't bolt an open knuckle outer to a closed knuckle axle.

Like Nick says, if you want to bolt the caliper from the '77 axle to the closed knuckle spindle, it can be done with the right technique. I don't know exactly what's involved, but I think it's no less complicated or involve less adaptation than using the Chevy parts. Chevy parts are cheap and plentiful compared to Jeep parts, so that's likely why all the writeups you find refer to Chevy parts. Maybe you use the Jeep disk brake spindles, but the 30 knuckles are completely incompatible with the 27.

 

:iagree: What Timgr said so well.

 

As a note, it really helps to have the factory service manual (FSM) and if you can find it, a parts catalog for the years covering your jeep.

I have found that between the diagrams in the FSM and the catalog, plus what this excellent community has offered in advice, pictures, threads, I've learned a gob more than the basic stuff (oil change) and brake work I'd done over the last few decades and then gotten away from (new vehicles, digital stuff under the hood), and I'm coming back to the basics, relearning and finding great support from our fine friends here. I really had to brush my google-foo up to find stuff (use something like this: site:earlycj5.net "brake conversion")... It helped.

id hang onto the parts you have as spares, then look for another 30, and run the d27 you have. (I have 2 27s that work, one with 10" drums, the other with 11"...).

best of luck on your project;, and we really like photos: your project, your critters named as pets, sunsets on the trail, dust in your garage corners, and all that.

 

To add to all this, if you have some specific questions we will do our best to help. An open ended question like asking for a writeup can shy people away from trying to help if they don't have a link to something already written. In my case I've been asked to do writeups on several occasions but I simply don't have the time or inclination, but am more than willing to help with specific questions and problems.