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StuckinAz · 02-27-2010, 04:32 PM

I am in the middle of servicing the rear diff. on my 64 1/2 ton GMC. It has a tag on it that say "46-13" on the top and "3.54". Now i'm thinking 3.54 gears....What is this thing and whats it doing under my truck?

It has patent #'s on it twice and the only other # was C90294 at the top right rear and 44-1 at the right bottom rear. Its a 3 rib on the driver side and 1 rib on the passeger side of the carrier. Any idea what I'm looking at without seeing a pic?

02-27-2010, 04:32 PM	#1
StuckinAz GM ONLY Join Date: Feb 2010 Location: Goodyear, Arizona Posts: 73	Rear End Numbers and Ratio I am in the middle of servicing the rear diff. on my 64 1/2 ton GMC. It has a tag on it that say "46-13" on the top and "3.54". Now i'm thinking 3.54 gears....What is this thing and whats it doing under my truck? It has patent #'s on it twice and the only other # was C90294 at the top right rear and 44-1 at the right bottom rear. Its a 3 rib on the driver side and 1 rib on the passeger side of the carrier. Any idea what I'm looking at without seeing a pic? __________________ "59 Apache Short Step "64 GMC Short Wide "07 Crewcab "08 Tricked Tahoe Last edited by StuckinAz; 02-27-2010 at 04:50 PM.