Quote:
Originally Posted by DustinJones
Nope Kubla that was my post . My tires are upgraded to handle highway speeds. I get 49 mph at 2800 rpm.. No where near reasonable or safe . I have looked all over and still can not seem to find the charts for factoring gear ratio by yoke stamp.. Or anyone who seems to have the setup my rig has that can tell me anything about there gear set ratios.
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A Dana is not a Rockwell. FWIW there are at least 3 major manufacturers of rearends, Rockwell (now Meritor), Eaton and Dana (Spicer). Usually there are some numbers stamped in the end of the pinion shaft so you might have to drop the driveline and pull the yoke to get a good look at it. You could bump tire sizes another size or two, but you'd only get 100 rpms or so per tire size (roughly) so changing the differential or drop-in is the way to
Once you determine which make (Dana) and model (RA39) of rearend, be aware that there can be different spline configurations for both the axle shafts and the pinion
Go to someplace like
https://www.heavytruckparts.net/search.php and do a search for RA39 and look at some pictures or LKQs website
Looks like it might be a Dana RA39