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Old 05-19-2003, 06:42 PM
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Post hard shifting ford

hi folks, i have a ford half ton i just bought and i seem to have problems with the tranny. when pulling away it is fine, but it shifts real hard (clunk).also when you let the gas off to make a turn and then re apply the gas it seems to rev and clunk. it is not slipping just shifts real hard. also it does not want to shift on the highway into third under accelleration, when you let the throttle off it shifts. is it done?? maybe torque converter? any help will be greatly appreciated. mike

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Old 05-19-2003, 07:05 PM
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I would suggest possibly 2 different problems, the clunk, you might check the u-joints. The shifting may be either a bad modulator or kickdown adjustments, I would check these easy things first, and not to sound obvious, but check trans level if you haven't already.
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Old 05-20-2003, 01:31 AM
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i checked it first, thats how i know there is a problem for sure.mike
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Old 05-20-2003, 04:16 PM
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SInce you have not provided information as to what trans you have, it is difficult to guess what the problem is. Like was said by Woodz, the modulator, throttle pressure, or fluid level could cause that problem as described. Check the vacuum hose at the trans. If it has fluid leaking from it, the modulator is bad. It may have a vacuum leak causing poor vacuum at the trans. That could be why it shifts after you let off the throttle. The clunking sounds like u-joints or rear-end. Don't usually get those kinds of noises from an auto trans. Even if it is low on fluid, dropping out of gear because of that, normaly you don't get a clunk.
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Old 05-21-2003, 01:32 AM
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i was checking the fuses trying to get my speedometer working, when i put the fuse in, the speedo worked,but when i drove it the gas registered 3/4 tank,the oil temp was up, the alt was on high, but the temp and speedo worked. the problem arose as i pulled away. it went into third gear within 30 feet and would hardly move.the tranny is big, i dont know the type(not good with fords)the truck has a tow package with posi , and the tranny pan is big enough to wash a baby in.thats all i know.its a 93.maybe this can help. mike
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