Discussion on a Dana Model 30 swap into an Early CJ-5
Hello all, I have a question about this swap from a
Dana 27 (I think that's what's on my '69 CJ-6) to a Dana 30.
If I find a Dana 30 with disc brakes, what's involved with
the brake pump change and brake line change? Also, will my
existing front drive shaft work? Or does that vary from year
to year? Would a 1980 Dana 30 work?
Thanks for any help, Will
Lynn Writes:
Try Mile High Jeep Builders in Denver for spacer info (303) 629-0378, I hear about 3 bills for a set of good ones.Jon Writes:
My understanding on the D30 swap is that a D30 from a'72-'75 CJ will bolt in directly without modification. Not sure, but I believe most, if not all of these came with drum brakes. It will be slightly wider than the D27. In talking with Mile-High Jeep, they identified this as something where initially most folks say, "well, that's okay if the front track is a little wider than the back," only to come back and correct the offset by adding some wheel spacers to the back axle.The D30 from the 80 model will need to be modified to match your springs.
Lynn Writes:
69CJ, interesting insight on the early AMC 30s. I knew it was about an inch wider than the 27, but figured no problem, as many older 4x4s had a front axle wider than the rear. I never considered spacers in the back. I can see where it could be a problem if straddling a deep gully or ravine, where you're running on the outside edges of the tires. Any other situation or reasoning for adding the spacers? Got a source for spacers?Thanks, Lynn
Will Writes:
So spacers in the rear and some modification for the springs are my only real concerns? The gear ratio should be the same as the rear right? I guess if all else fails I could change that if I get the axle cheap enough. Thanks for the insight. Anybody modified an axle to accommodate springs?Jon Writes:
RE: the gearing question, yes - your gears should match front and back.RE: any other reason for adding the spacers to the rear.....
My 69 is lifted 2.5" with the Rancho kit. I also swapped out the stock shackles for ones that will provide 3/4 additional lift. So, in effect, I've installed a 3.25" lift. Add that to 33" M/T, and the little bugger is starting to take on a much more aggressive look.
I've gone up, but the 12.50 tire only brought me a little wider on this short wheel base rig, so I WELCOME the added width of the D30 up front. By adding the spacers to the rear, I'll be going wider there as well which will only enhance stability with the higher center of gravity. Besides, having everything straight just seems to look better to me. Just my 2cents.