I have a older john deere 550 dozer that the transmission has stopped working correctly and the left steering just went out when it is cold it pulls fair but once it . I have a jd550 dozer changed transmission filter after noticing transmission pressure was on the low side of the green on the guage the fluid is. 1978 550 dozer problem with and some times frustrating to work on i was a transmission mechanic right out of school so multiple plate john deere crawler faqs . My brother purchased a john deere 550 dozer a few months ago to clean up a farm we are having a problem with the hydraulic tank slowly loosing fluid. Looking for john deere 550 bulldozer transmissions we sell a wide range of new aftermarket used and rebuilt 550 replacement transmissions to get your machine back