96 F-150 Tranny shudder at 45 mph - F150online Forums

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96 F-150 Tranny shudder at 45 mph

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Old 10-16-2004, 01:44 AM
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96 F-150 Tranny shudder at 45 mph

I have a 96 F-150 5.0, auto trans (with factory cooler) 4 wheel drive. It has about 95K miles.

I'm getting a vibration that comes on at about 45 mph, and goes away at 50 mph. I'm pretty certain it's in the transmission, because if I take it out of OD when it's vibrating, it goes away instantly. If I take it out of OD before it vibrates, it never happens.

Last tranny service was at about 50K, so I'm due. Is this a symptom of a bigger problem? I'm not certain which trans I have but can find out if that would help any of you experts.
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Old 10-16-2004, 06:08 PM
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For the record, according to the ID method down the tranny thread, it would appear that I have a 4r70w trans in it. Also, the fluid is full, but not overfilled. Also, the fluid doesn't look or smell bad.
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Old 10-16-2004, 07:11 PM
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Sounds like torque converter shudder to me. Check your spark plug wires first.
Alan
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Old 10-19-2004, 09:06 PM
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I agree with dirty, sounds like torwue converter shutter, had that problem on a '96 Cougar XR7 with a 4R70W
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Old 10-20-2004, 03:41 AM
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Thanks guys, I will throw a new set of plugs and wires at it when I get back from vacation. (no, we're not taking the truck.)

What you're saying is starting to make a LOT of sense, since I just noticed the last couple of days that I'm getting the shudder at about 1500 rpm in the regular gears w/o OD.

I'll post the results

Thanks again
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Old 10-30-2004, 04:49 PM
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Dirtydog and Inlinesix- you guys are great!!!!!!! Put new plugs and wires on it, and my shudder is completely gone. As expected, I got some extra power (And probably mileage) in the deal.

I REALLY appreciate your input, guys. I was starting to get scared about the transmission.

Thank you doesn't begin to cover it.

Brian
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Old 10-30-2004, 04:56 PM
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Glad you got it fixed.
Alan
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