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Old 03-04-18, 01:36 PM
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Ozzzzy
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Question Driveshafts

I think one of the u-joints is going bad. Does anyone know if a 300 AT driveshaft is the same as a 5sp?
Old 03-05-18, 08:58 AM
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vipsoarer
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Do you know which u-joint is going bad; front or rear? The rear half is the same, but the front half is different. Same with the sc400 vs the 300 5speed and 300 auto.
Old 03-05-18, 03:01 PM
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I had it jacked up and I was spinning the wheels and I STILL couldn't tell what was bad. It makes the trany {with the shifter] bounce up and down and around 3-5 mph then you can feel the vibration in the shifter at higher speeds. It has settled down but will start up after going over and large bump or speed bump.
So I just can't pull a AT driveshaft and install it in my 5sp?
Old 03-05-18, 03:56 PM
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The problem is the manual trans has a yoke connection to the trans, whereas the auto uses a flange and guibo connection. For example, the way the driveshaft mounts to your differential is how the what the auto uses for both trans and diff connections.

Try getting a pry bar or a thick screwdriver and try to pry on the transmission mount. See how much it moves. They are very prone to breaking down. Another spot to look is in the middle of the driveshaft. There is a carrier bearing housed in a rubber isolator. These wear out as well and can cause the noise and vibration.

Check those things out and get get back to me. We’ll get it figured out.
Old 03-06-18, 07:31 AM
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Ozzzzy
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There are two sc300 driveshafts on ebay and both have yokes on the fronts and both say they are for AT's
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