Not So Good Vibrations (Apology, Beachboys)

[DHugg]

Now that everything loose is tightened up underneath my 1980 CJ7 , AMC20 , Dana 300 , TF999 , AMC 304 , I can feel vibration when under throttle, and none when throttle off at same speeds. I looked over the rear driveshaft, and I get "clunk-clunk" when I push side to side on the AMC20 yoke U-joint. I can see the u-joint move under the straps.

So new U-joints and U-bolts replacing POS straps are needed. The yoke on the AMC20 Diff can be drilled, but the yoke of the D300 has no flats and not enough real estate to grind a nut face.

Can anyone suggest a junkyard donor where I can find a yoke that will bolt to the D300 front/rear shaft, one I can drill if needed for U-bolt clamping of U-joints?

Any other wisdom will be gratefully accepted.

Once this job is done, I can move to the front end for some road-handling improvements.

Photos '80 CJ-7 rear driveshaft, R shaft to AMC20 U-joint, r shaft to D300 U-joint.

 

[Saddle Tramp]

I would talk to Advanced Adaptors. I think you can do some yoke swapping but they will know spline counts.

 

[Old Dog]

you can always go new if you have to.Jeep Dana 300 upgrade yoke kit ubolt CJ transfer case
If you google Dana 300 yoke, it looks like theres a bunch of info.
Thats where I go the above link, I know nothing of the company selling the yokes.