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John Deere Tractors Discussion Board

7520 4wd transmission problem


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Posted by Deere7520 on September 29, 2012 at 18:11:01 from (207.177.56.89):

I have a 1975 7520 and was pulling loads of beans with it today. Nothing major just 450 bu at a time aboud 3 miles down the road. I was pulling in 7th gear low speed just fine rpms would stay just the same going up and down small hills. When hauling empty I started in 6th and shifted on the go to 8th from range I to II (not high and low) and the tractor just died. I couldn't get it to pull it's own weight in 8th gear even on a roll from 6th but with a full load it will go easily from 4th to 7th on a roll. When I got back I checked the trans fluid and it looked a little low but it wasn't quite level and the torque divider and transmission were so hot you couldn't hold your hand on them. Even the axle housing were hot all the way back to the rockshaft piston. What would be causing this. This is a tractor I bought and hadn't really used it for anything yet but had changed the engine oil but not the trans yet. I plan to change the trans oil and filter next. What sould I be looking for next.
Thanks


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