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Old 10-27-2013, 04:57 PM
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Shaking while accelerrating

Have a 2001 F250 with 127000 miles. Has a 6.5" lift and 37s. While accelerating it shakes pretty badly. Only does it at low speeds and seems to only do it in first. It is an automatic. At higher speeds still shakes a little but not much as low speeds. When shifting into neutral and give it gas it does not shake. So it is drive train related. I believe it is maybe the driveshafts or worst case the tranny. Would like some input before i start replacing parts.
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Old 10-27-2013, 10:36 PM
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It's probably the drive shaft angle. Crawl under the truck and check the front and rear halfs of the drive shaft, they should be cloose to straight. If there is a big angle, shim the carrier bearing down. It's usually about 1/4" per 1" of lift but varies depending on wheelbase.
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Old 10-28-2013, 01:35 AM
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Quote:
Originally Posted by JSchuricht View Post
It's probably the drive shaft angle. Crawl under the truck and check the front and rear halfs of the drive shaft, they should be cloose to straight. If there is a big angle, shim the carrier bearing down. It's usually about 1/4" per 1" of lift but varies depending on wheelbase.
Yep, this and axle wrap is more noticeable because of the lift.

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Old 10-29-2013, 08:22 AM
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Quote:
Originally Posted by JSchuricht View Post
It's probably the drive shaft angle. Crawl under the truck and check the front and rear halfs of the drive shaft, they should be cloose to straight. If there is a big angle, shim the carrier bearing down. It's usually about 1/4" per 1" of lift but varies depending on wheelbase.
if i had a carrier bearing. since i have a short bed extended cab, i do not have one. I found bolts loose in my tcase and that was the problem. as to why they came loose, i dont know.
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Old 10-29-2013, 10:39 AM
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Originally Posted by Randonizer View Post
if i had a carrier bearing. since i have a short bed extended cab, i do not have one. I found bolts loose in my tcase and that was the problem. as to why they came loose, i dont know.
Use loctite 242 or 243 on those bolts. Its removable type, blue.

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