Pavolka Posted March 8, 2007 Share Posted March 8, 2007 I took the r200 3.54 gear diff out and put r200 3.90 diff in. All went well until i tried to put the driveshaft on. The '81 differential flange has smaller bolt holes then the 1975. Can I take the flange off of the '75 and puy it on the '81? Or do I have to change drivelines? Quote Link to comment Share on other sites More sharing options...
Darrel Posted March 8, 2007 Share Posted March 8, 2007 You can change just the diffy flange. '75 was a weird one with the flanges and driveshafts. Quote Link to comment Share on other sites More sharing options...
Pavolka Posted March 8, 2007 Author Share Posted March 8, 2007 Thnak you I'll give it a try! Quote Link to comment Share on other sites More sharing options...
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