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If anybody can help me with an idea on this, I'd really appreciate it!! I bought a school bus recently. It's a 1980 Ford chassis, Carpenter built 34-passenger with an automatic Allison AT-540 4-sp. The owner said he hadn't had any transmission problems in it, but it hadn't been driven out of town for quite a while (probably never made it to 4th). Driving it home, after about an hour on the highway, starting from a stop, it wouldn't shift past third gear. After I let is cool down for about 25 minutes, it worked fine for another 50 miles or so, then wouldn't shift out of first. At first it would if I manually changed the selector back, then not at all. I let it sit for an hour, and it was fine again, but only for another 50 miles or so. I put a quart of Trans-X in yesterday and tried driving it again, and it was fine again for about 40 miles then wouldn't shift out of 3rd, then 2nd, then 1st. Is there anything else I can try without ripping apart the transmission?? I can't see any loose sensors or wires... thanks for any help you can give me
It sounds like the filter is plugging off. But that is a guess. Drop the pan and check it. If it is it most likely has bad things going on inside and needs a mojor repair. Good Luck
email Dominic Svornich
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