[drespecki]

Did anyone find the 'exact' part number for the early to mid 80's J20 power steering gear box that has the 3.5" piston? I know for a fact that Cardone 27-6529 is from the 70's, might be the 3.5" piston, but has the flare fittings while the CJ7 needs/has the O ring type hoses. I looked until my fingers bled but it seems that the O ring version runs by the part number 27-6528 but cannot be verified as the 3.5" piston model... They used them in J10's, Grand Wagoneers, etc..

Is there any super specific part number for the O ring style, mid 80's, J20 with the 3.5" piston????

[wm69]

From what I could find if you want the bigger piston you have to go with the earlier, flare style boxes. I plan to just get a J20 box for a 76, get new lines with flare fittings, and get adapters to allow the flare lines to work with my existing power steering pump.

[drespecki]

Yeah, if no one can come up with a magic part number for the 80's gear, I will likely do the same.. I am putting it on a 1983 CJ7 258.

[har99]

check out my post #25 on link below which has 2 other links to the part numbers. funny this post was only a week ago.

http://www.jeepforum.com/forum/f8/25...r-box-1211170/

[wm69]

My suggestion would be.....order a J20 box, look for the larger cap, and four mounting holes. When they try to give you the wrong one, say "no, the one I want has four mounting holes and a larger cap". Kind of a pain, and eliminates using rockauto, but at least at the local shop if it isn't right they can reorder it until it's the right one.

[stripperguy]

I just installed a J20 box in my '77 CJ5 last night.
I bought it directly from Autozone online. I used my angle grinder to cut off the little nubbin that was originally used as a pilot diameter for a rag joint coupling. I have all the stuff at work, I'm home now, but can look up the part numbers tomorrow if you want. I think it was for a 1976 J20...
Anyway, it does have the flare fittings and the large piston and 4 mounting holes. It was around $125 plus core, the core can be dropped off at any Autozone store. The bell coupling spline is the same as my old coupler from the manual box. I have 3 more big piston boxes (all leak like crazy) and any of the pitman arms fit just fine. For my application, I had to ream the TRE taper bigger to fit the larger Moog TRE's.
Oh, and the bell coupling is a little close to the bottom tank of my radiator, I'll probably remount the radiator a little higher to avoid any problems.
Other than that, it was a straight bolt in deal!!

[drespecki]

What is the measurement of the end cap on the J20 compared to the CJ7 end cap? Any other physical differences?

[stripperguy]

here is the part listing direct from my order confirmation:
Duralast/Steering Gear (Power Steering)
For your 1976 Jeep J20 5.9L 4BL OHV 8cyl
Part Number: 6529

End cap for this steering gear is same as my other 3 leaky units...I can measure when I get home if you need.

[waterdowg]

The 76 will be differnt fromt the 83. One uses o-rings the otehr uses flare fittings. The j20 box has a larger end car then regular box. I think is is ver 4" on the J20 box.

[Pathkiller]

I used Cardone 27-6505 purchased from Rock Auto for $75 plus $25 core charge. It measures 3.5" at the cap. It's listed as a 78 J20 part, and also some big GM cars of that era. It's the flare fitting type, but it's easy enough to convert from flare to O-ring and vice versa.

[drespecki]

How can that be when my small bore steering gear cap measures 3 and 13/16's ? The big piston gear should be at least 4 or bigger?

[Pathkiller]

Inside diameter, not overall diameter.

[drespecki]

What is the outside diameter if I may ask?
Thanks..

[Pathkiller]

Here's my quick measurements with a tape, not calipers:

1978 J20 box: ID-3.5", OD-4.25"
1978 CJ5 power steering box: ID-3.0", OD-3.75"