I just replaced my 1985 rear axle and NP205 drive shaft yokes so that I now can run the CORRECT U-Joints/drive shafts for the Cummins. I found that my 1985 size spicer u-joints are FRIED after only 7 months of running behind a Cummins! So keep in mind that running the smalll u-joints should only be temporary fix untill you replace them with the large ones if you intend to mash the petal every once in a while
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These yokes BOLT on to the 1985 Dana 60 rear axle and the 1985 NP205 transfer case with any modifications !
SPICER Part Numbers as follows (sorry I forget which is which).
SPD 3-4-10951-1 YOKE $59. 09
SPD 3-4-5711-1X YOKE $130. 00
SPD 3-70-28X Strap & Bolt Kits $5. 27 each
I got to give Mike at Valley Truck Parts a BIG thumbs UP.
He really went out of his way measuring the old yokes with a micrometer, and then went looking through a bunch of manuals for about 20 minutes to find the correct yokes. And would you believe they had them IN STOCK ! They mainly work on the big rigs, but treated me like my truck was the only one on the road. Boy couldn’t Banks learn a thing or two from them. Valley Truck Parts is now rebuilding my drive shaft from my 1991 donor truck and should be ready tomorrow. Valley Truck parts phone number is 800-783-8300, and is located in Grand Rapids, Traverse City, St Joseph, Detroit, Gaylord, MI.
Hope you guys find this helpful
Kyle

These yokes BOLT on to the 1985 Dana 60 rear axle and the 1985 NP205 transfer case with any modifications !
SPICER Part Numbers as follows (sorry I forget which is which).
SPD 3-4-10951-1 YOKE $59. 09
SPD 3-4-5711-1X YOKE $130. 00
SPD 3-70-28X Strap & Bolt Kits $5. 27 each
I got to give Mike at Valley Truck Parts a BIG thumbs UP.

Hope you guys find this helpful
Kyle