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D-180 won't go in reverse

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My 74 d-180 automatic works fine except for reverse. When put in reverse I have to throttle all the way up and then it backs up as slow as a snail. What do i need to do to fix this? Please help.

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Well adjusted the linkages, didn't help. Then I undid the linkages and pushed the transmission lever all the way back, still goes slowly. Any other suggestions?

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Sounds like you're gonna have to start checking valves and springs. See the trouble shooting guide posted above. 

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Changed filter and it is working better, so now I will change the oil and filter again after a few hours of running it. It did sit outside for 6 years and didnt have the filter and oil changed in 9 years or more.

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Did you put in new O rings and backer rings between the manifold and the motor? did they seat correctly??

 

Does the midmount lift work??

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