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Old 05-24-2010, 07:14 PM
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T-350 rebuild problem

I just recently finished rebuilding my th350 and its now in my s10. And I have a problem. With The truck on jack stands, and the trans full of fluid, I put it in reverse and reverse works, then i put it in neutral.....but the trans still stays in reverse????? why is this???? The rest of my forward gears work.... I have a manual valve body and the trans goes into 1st, 2nd, and third gear.....what gives??? also, When the trans is in gear with the output shaft moving their is a clicking noise that comes from the trans??? but it doesn;t make that noise in park

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Old 05-24-2010, 08:31 PM
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The trans staying in reverse when in nuetral while up in the air is acceptable. When the vehicle is in the air there is no force to counter the previously applied force. Without a load against the output shaft the minor friction of the clutches will cause the internals to turn. Is the driveshaft installed? You said the output shaft is turning. The yoke on the driveshaft rides in the output bushing and holds the output shaft centered. If the driveshaft isn't installed the output shaft could be flopping around in the tail housing. The speedo gears or parking pawl could be making the noise. With parking brake applied and trans in nuetral is the still present? We need to find if the noise is on the input side or output. Good luck.
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Old 05-25-2010, 06:33 PM
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problem 1. While I had the truck on jack stands, I put the trans in neutral and the tires spun in reverse. Apparently there was just a little bit of apply on the clutches and it wasn't actually in reverse. I put the truck on the ground and neutral acted as it should.

problem 2. The clicking noise was made when the truck was in gear and the rear wheels were moving. In other words, the noise was made when the output shaft of my transmission was moving. (note, i do have a 4 wheel drive.)

Now the sound is barely noticeable. And I currently have the transfer case shifter console removed and the shifter boot removed, meaning the transmission is exposed directly to me in the cab. With the console and boot back on, I dont even think I would here the sound. Is it possible that the weights on a th350 governor could be making a slight clicking noise?
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Old 05-25-2010, 08:21 PM
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Problem 1: That is exactly what I was trying to describe. It is not that there is a slight application of force; but the natural friction of the components in the transmission. That is normal and I see it all the time at work.

Problem 2: I don't think you would be able to hear the weights of the governor. Is it possible that you are hearing the chain in the transfer case clicking?
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Old 05-26-2010, 03:35 PM
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i think its entirely possible that it could be my transfer case I'm hearing.
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Old 05-26-2010, 05:45 PM
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The chain will make a slight noise from the slack in it. Does it make the noise when in 4x4? I would button everyhing up and test drive it in 4x4 and 2 wheel. Making sure that the trans or tcase doesn't pop out of gear. TH350 are known to tear up thrust bearings. However I would think you would have found that when you rebuilt it. I think you are hearing the chain slap. Good luck.
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Old 05-26-2010, 08:12 PM
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Its making the noise in 2 wheel drive. I haven't tried it in 4 wheel drive. As far as thrust washers, I replaced all of them when I did my rebuild; with exception to the needle bearing thrust washers.
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