The Ford Barn - View Single Post - F-6 two speed rear won't downshift

budmanroch · 06-23-2019, 07:42 PM

Well, I really don't think its my driving. I drove this all last year and could split shift and downshift on the hills when loaded. This winter I changed the engine and transmission and now I can't downshift the diff. I don't think its a vacuum leak because the way I see it, the the high range is under vacuum and the low range is 0 vacuum and under spring pressure. The reason I think that is because when the engine is off it defaults to 0 vacuum and low range. I watched the actuator when I switched the vacuum on and off and confirmed this. During the engine replacement, I tightened a lot of loose hoses and the threaded connections on the valve and the splitter.

I'm pretty sure something else has gone wrong. I just don't know where else to look.

06-23-2019, 07:42 PM	#5
budmanroch Member Join Date: Dec 2018 Location: Mendon NY, 10 miles S of Rochester Posts: 30	Re: F-6 two speed rear won't downshift Well, I really don't think its my driving. I drove this all last year and could split shift and downshift on the hills when loaded. This winter I changed the engine and transmission and now I can't downshift the diff. I don't think its a vacuum leak because the way I see it, the the high range is under vacuum and the low range is 0 vacuum and under spring pressure. The reason I think that is because when the engine is off it defaults to 0 vacuum and low range. I watched the actuator when I switched the vacuum on and off and confirmed this. During the engine replacement, I tightened a lot of loose hoses and the threaded connections on the valve and the splitter. I'm pretty sure something else has gone wrong. I just don't know where else to look.