Where are numbers located on 77 rear end?

greg oliver

Well-known Member
I was working on my 77 today and only numbers I found are what I thought was the casting date for rear end housing down by the drain plug 10 18 51 and on rear axle housing A 700. I saw chucksoliver 77 video plowing and was hoping my 77 has low speed ring and pinion. Thanks, Greg
 

Greg, the only way to know for sure is to pull the trans cover and count the teeth on the ring and pinion gears. The ring gear has 48 teeth and the pinion has 9., the high would be 11 and 50. My tractor came with the high speed gears and dad had them changed to the low speed to handle the bigger chopper rather than buy a bigger tractor, worked out quite well for him and great for me. Chuck
 
Thanks Chuck, I liked your videos! I got a fan today for the 77 at my local tractor bone yard (McFadden's). He had at least three 77's and three different fans. Wondering now if the broken fan that was on the 77 was original. Thanks for your fast reply. Greg
 
Interesting date. I take it your serial number tag is on the dash already and not on the side of the transmission!. Does your engine have the pad by the distributor for the Hobbs type hour meter? Axle housings have a 700 casting number. The prefix letter will identify the model.
 
John, serial tag is on lower dash but painted over. Is that the casting date for rear end housing? What would work best for cleaning off serial number plate? Hydraulic unit is kind of in the way and also has an extra reservoir was that made by Oliver? Hydraulic unit is hydro-electric but non functioning switches are corroded and wires unhooked. I dropped starter off at repair shop last week and was going to try and pull start it today had spark at the points not sure if to plugs. Does Hobbs hour meter pad have the four screws holding cover? Thanks Greg
 

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