joes mack Posted March 11, 2016 Share Posted March 11, 2016 do they make a bastard size u joint that measures ( without the cups ) 5inch X6 3/4 we just changed the rear end in our ford tanker it had a 18,000lb eaton in it we replaced it with a 23,000lb eaton rear end. if they do does anyone know the part number? thanks joe Quote Link to comment https://www.bigmacktrucks.com/topic/44304-u-joints/ Share on other sites More sharing options...
j hancock Posted March 11, 2016 Share Posted March 11, 2016 Click on the u joint style that you need and it gives the various dimensions and part number. http://spicerparts.com/resources/measuring-u-joints Depending on your mix of parts, you may have to swap the rear axle drive yoke to make things work together. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/44304-u-joints/#findComment-327196 Share on other sites More sharing options...
joes mack Posted March 11, 2016 Author Share Posted March 11, 2016 its looking like we are going to make a trip to the drive line repair shop. no one makes a adaptor joint as I have been informed by spicer/dana and eaton does not show a part number for a pinion yoke to fit the smaller u joint we have so we are going to have to get a driveshaft made with the small u joint on 1 end and the big one on the other. which should be easy as both drive shafts are 4 inch tubes. thanks for the link j hancock . that's where I got the number to call spicer/dana . Quote Link to comment https://www.bigmacktrucks.com/topic/44304-u-joints/#findComment-327208 Share on other sites More sharing options...
Hobert62 Posted March 11, 2016 Share Posted March 11, 2016 When I stretched my B I ran into the same issue of 2 different sizes. I took my existing drive shaft to the shop with a measurement. they where able to just replace the yoke on the one end of the tube and not have to build a whole new shaft. Quote Link to comment https://www.bigmacktrucks.com/topic/44304-u-joints/#findComment-327216 Share on other sites More sharing options...
joes mack Posted March 11, 2016 Author Share Posted March 11, 2016 that's what he is going to do we cut the ends off of both shafts Quote Link to comment https://www.bigmacktrucks.com/topic/44304-u-joints/#findComment-327224 Share on other sites More sharing options...
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