60 series axle with odd diff/pinion flange (1 Viewer)

BreckenridgeCruiser

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I have two 60 axles under my 1981 BJ44 and I am finally getting around to setting up the front driveshaft. While trying to install a BJ42 (5 speed front driveshaft, it appears that while the t-case side matches up, the diff side does not. I assumed this might happen so I measured the bolt pattern and in the rear I have a bolt pattern of 68.5 x 65/66mm the front seems to be 66 x 66mm

What flange do I have for the front? I have never seen this flange in the searches I have done so I am confused.

Also, if anyone has a differential flange of the early 68.5 x 60mm I could use it!
 

mattressking

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Hopefully this will help you...

1/78-11/84 = 68.5 x 60mm
11/84-1/90 = 66 x 66mm

68.5 x 66 sounds like its later 89 and later...haven't dealt with that one yet.

1602887415537.png
 
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BreckenridgeCruiser

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Okay... I just measured again... Looks like both of my diffs are post '84 60 flanges. 66 x 66 on both. Makes sense too because my rear driveshaft is a double cardan (from an 81-84 60) which has the same t case flanges as a 40. I must have swapped the slip yoke side with an '85 and later to get it to match up.

Looks like I need to do the same now for the front!

Thanks!
2020-10-16 15.42.36.jpg
 

BreckenridgeCruiser

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I plan to rebuild my axles in the near future so it might be a good time to upgrade the flanges then... In the meantime, I guess I could clamp the yoke in place to mark and center punch. Since it's the front driveshaft it doesn't have to be perfect as I won't be driving in 4wd at high speeds...
 

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