th200 neutral is drive?? problems

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Old Mar 15, 2011 | 11:32 AM
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84oldsDelta88's Avatar
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th200 neutral is drive?? problems

i wanted to see if anyones ever seen anything like this, ok so i have a 307 with th200c thans, when in park revving the engine it acts as if i'm in gear and has a load on the engine, reverse does nothing, the trannys locks up like its in park and still acts as if the engines in gear and has a load on it, neutral acts like drive and with the car jacked up the wheels spin like its in drive, drive 2 and 1 all work for drive and acts normal, i had a tiny hole in the transmission cooler lines lost almost all its fluid fixed it and refilled with fluid and well here i am what do you think broke/let go
Old Mar 15, 2011 | 01:34 PM
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It's ok to use a period, really it is. This needs explaining better and some punctuation to understand.

Off the top of my head it seems like maybe the gear selector lever rotated some on the shaft coming out of the trans. Like park = reverse, reverse = neutral, etc, etc. Or maybe the indicator and shifter aren't synced. If it's mechanical then I have to say I don't know.
Old Mar 15, 2011 | 02:12 PM
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Something to do with the lockup torque converter?
Old Mar 15, 2011 | 08:06 PM
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Off the top of my head it seems like maybe the gear selector lever rotated some on the shaft coming out of the trans. Like park = reverse, reverse = neutral, etc, etc.
I agree, I would check this first. Make sure the nut is tight on the rod coming out of the trans.
Old Mar 15, 2011 | 08:21 PM
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check your linkage for missing bushings.when they break,your linkage does crazy things.

you think youre in park,but you might be in reverse.
Old Mar 16, 2011 | 03:16 AM
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Spares-

.......... ,,,,,,,,,, ;;;;;;;;;; :::::::::: ??????????
Old Mar 16, 2011 | 06:37 AM
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84oldsDelta88's Avatar
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i checked the linkage its not that.here let me try to explain it a little better the first post i was in a rush typing it. when in park and if i rev the engine it acts as if i'm in gear holding the brake on, (brakes are not seized) if i put it in reverse i hear no clunk into gear and it does the same thing as park. neutral goes into drive and so do D 2 and 1. i had the car lifted on jack stands and with the car in reverse and running tried to spin the tire in revers and its locked up as if i'm in park still. like i said the linkage is good, i'm not even worried about that transmission anymore just got a good deal on a 70' olds 350 with th350 trans going to pick it up tomorrow 300 bucks sat for ten years though but i'm gonna see what i can do with it
Old Mar 16, 2011 | 10:40 AM
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Yeah I think it's the linkage too, but if you can get a 350th, just swap it, the 200th sucked anyway

If your going to do the 350 trans, why not do a 200r4 or 700r4 (the 700r4 will need an adapter plate since they are only in the Chevy block bolt pattern). TCI makes a vacuum kit now so they can shift without overheating the convertor
Old Mar 20, 2011 | 08:24 AM
  #9  
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drop the pan and check the linkage inside. I had the same problem on a TH350 years ago.
Old Mar 20, 2011 | 08:34 AM
  #10  
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Originally Posted by Yellowstatue
.......... ,,,,,,,,,, ;;;;;;;;;; :::::::::: ??????????
Careful. Those semicolons may be stale; they tend to sit on the shelf a long time.

As for the rest of it:
Why not disconnect the linkage from the transmission, use a screwdriver where the linkage connects to run through the gears and be sure the detents feel good, then start the car in Park (wheels safely off the ground), and click through the gears one at a time, checking to see if the problem's still there.
If it's not, then adjust your linkage.
If it is, then open your trans.

- Eric
Old Mar 20, 2011 | 09:00 AM
  #11  
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It still sounds like the torque converter clutch to me.
The load you feel while sitting could be from it not disengaging, random gear engagement like neutral is another sign.
May have trashed it from running with low fluid.

" If the TCC is bad one of three things will usually happen. First, the vehicle will tend to rev up and down as it engages and disengages, not being able to keep the converter clutch locked up. Second, the converter clutch will engage randomly in gears that it shouldn't even engage in usually. Third the clutch doesn't want to disengage. As you slow down the vehicle won't downshift and if you try to accelerate the RPM's will be so low that the vehicle will have difficulty moving quickly. In extreme cases the lockup converter will try to keep the vehicle moving as you try to stop at a stop light, or will stall out and die."
Old Mar 24, 2011 | 03:52 PM
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the fwd clutch pack is burnt up and welded together
Old Mar 27, 2011 | 06:49 AM
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I had a similar problem with my car while restoring it. I had taken the trans out and cleaned it up, painted it and changed the filter and fluid. I did all of this while the trans was setting on a pallet and I had turned it on its sides to clean all of the sludge off. When I put it in the car it displayed the same symptoms you are describing. I found that the "S" clip that connects the linkage to the valve (not sure if that is the parts real name or not) had come off while I was moving it around and the shifter was not actually moving the valve inside the valve body. I would drop the pan and check to see if everything is attached by having someone move the transmission selector while you watch from below. Maybe the clip is setting in the bottom of the pan. Had a pretty bad scare with this situation as well because my neighbor and I were trying to figure out what was wrong with it since it wouldn't go in reverse. He got in the car, started the engine and gave it some gas while the gear shift was still in the park position, come to find out the only thing keeping the car from moving was the park pin because the valve inside the transmission was actually in the drive position inside the valve body. While he was gassing the engine the park pin decided to let go and the car lurched forward and almost smashed into my TrailBlazer which was setting about ten feet down the driveway. Good thing he also had his foot on the brake at the time and was able to react quickly enough to stop it.
Old Apr 3, 2011 | 11:27 PM
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So what did you find out?
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