Where would I look on my differential for the serial numbers? I believe the rearend is original, but would like to make sure. It's a 1960 12bolt limited slip, with a tortion bar going from it to the frame. Thanx Rory
From the book I have, the following:"The rear axle is identified by 2 letters. These letters are followed by numbers indicating the month and day of axle assembly. The rear axle plate is located on the forward upper surface of the carrier. The 1/2 ton rear axle unit number is stamped on the right front carrier flange." If indeed the original from a 1/2 ton, it will be one of the following codes: MA, MB, MC, MD, ME, MF, or MG. All were 3:90:1 except the MB which was 3:38:1. Hope this helps and good luck.
>From the book I have, the following:"The rear axle is >identified by >2 letters. These letters are followed by numbers indicating >the month >and day of axle assembly. The rear axle plate is located on >the >forward upper surface of the carrier. The 1/2 ton rear axle >unit >number is stamped on the right front carrier flange." > >If indeed the original from a 1/2 ton, it will be one of the >following codes: MA, MB, MC, MD, ME, MF, or MG. All were >3:90:1 >except the MB which was 3:38:1. > >Hope this helps and good luck. Ya gotta love those Factory Service manuals. Get one today !! Required reading... Dennis
The rear axle tube facing the rear on the drivers side has this stamped. (WE1101) What would that tell me? Thanx
Not sure. The book shows only the '63 or '64 used any of the 'W' codes. The rear in my '64 is the original. It is a WE code. The numbers after WE are probably some kind of production number. On mine, the WE is on the very bottom of the housing. That would be facing the ground if it were installed on the truck. At the rear of the differential, bottom right of the cover plate is a little tag with the date code. Mine is G303. That means: A is January, B is February, etc. Mine is August. 30 is the day of the month and 3 is the last number of that year. So, mine is dated August 30, 1963. Perfect for a '64 model year. Look around some more. No telling what you may find. I have the book. Post here and I will help if I can. Once we try to ID this rear, you will want to confirm gear ratio. If you don't know how to do that, post. The characters on this forum will guide you. :7 :7
I'm confused (nothing new) Ok, I have the factory assembly manual. If I am correct, my 1966 VIN starts with c15 meaning long base truck, which it is. In the book for '66 it shows it should have a designation of HF(3.73 excl. posi), HG (3.73 with posi), or a HH (4.11 overdrive). Obviously I don't have the latter. However, it looks a lot like a HA which would be the correct number for a 3.73 non posi in a '65. Is it possible they used some 65 axles in the early '66's? I'm going to remove the brake fitting that sits there as it partially blocks , but it sure looks like HA
It sure is !! It's also possible they used that designation across many years. My 64 had the same code and it was a 3:73 non-posi.. It's the date tag that narrows it down to when it was manufactured. dv
there are a few things you can look at. like the mounting pads? are they straight or on an angle does it have a trac bar mount? is it a bracket on the tube or a stud on the center section? what suspension does your truck have? leaf or coil? doesnt realy matter in the end, a welder will solve any fitment issues.
