Transmission output shaft seal keeps coming out?

1998 FORD RANGER
150,000 MILES • 2.3L • AUTOMATIC
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ARIANADANIELLE5345
Car was vibrating at high speeds and then output shaft seal popped out so I changed transmission mount and u joints and seal. Popped out again so I changed yoke and trans extension housing. That lasted a while but then vibration started only when I let go of the gas pedal at high speeds to coast and then it popped out again last night. It looks like driveshaft is angled weird. I don’t remember if it was like that already. The driveshaft is fine but something is continually making the seal come out. I guess it could need to be balanced but I really don’t think that’s the issue. Is there anything else can cause it? Lead springs? Suspension? I don’t know. I’ll include pictures
May 21, 2026 at 3:02 PM
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ARIANADANIELLE5345
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Here is a pic. I can upload more if needed
May 21, 2026 at 3:25 PM
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ARIANADANIELLE5345
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.
May 21, 2026 at 3:26 PM
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STRAILER
  • ASE Certified Mechanic
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Yes, please upload more images of the truck and suspension. I have a question, is the truck lifted? If so the driveshaft is to short which makes the input yoke wobble and causes the vibration and the seal to "pop" out. In this image is the rear wheels on the ground, normal load?
May 22, 2026 at 1:13 AM
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