Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Transmission Shifting Sensors?

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Old Jan 3, 2011 | 09:58 AM
  #1  
adamlinn13's Avatar
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Transmission Shifting Sensors?

Hello fellow 3rd Gen's,

My 1984 V8 305L Chevy Camaro's transmission was recently worked on (torque converter replaced and shifting cable replaced) because it was having problems shifting (the RPM would get very high before it would shift). I also replaced the carb, coolant temp sensor, and MAP sensor. For a while that seemed to have fixed it. Then when the car was warmed up I noticed that it was having problems shifting again. Other times, before the car warms up it has shifting problems. I keep getting the "check engine" light but no place can check that. I am wondering if there are any other sensors that I might need to replace to get it to shift normal all the time.

ANY help is greatly appreciated.

Thank you,
Adam
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Old Jan 3, 2011 | 10:24 AM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Transmission Shifting Sensors?

The ECM has absolutely no control over the shifting of the transmission, so anything you've changed outside it won't do you any good.

Are you still running the Quadrajet?
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Old Jan 3, 2011 | 01:34 PM
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Re: Transmission Shifting Sensors?

Originally Posted by Apeiron
The ECM has absolutely no control over the shifting of the transmission, so anything you've changed outside it won't do you any good.

Are you still running the Quadrajet?
After I replaced the carb (same type of carb, just rebuilt), coolant temp sensor, and MAP sensor the transmission was running fine.

Rochester Quadrajet E4ME carb still running and running good.
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Old Jan 3, 2011 | 02:06 PM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Transmission Shifting Sensors?

Right, none of those things affected the transmission, except possibly the TV cable adjustment that was changed without realizing it when you changed the carb.

Sometimes drivability problems can make you think that there's a transmission problem when there's not. Can you describe your symptoms in detail?
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Old Jan 3, 2011 | 02:31 PM
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Re: Transmission Shifting Sensors?

Originally Posted by Apeiron
Right, none of those things affected the transmission, except possibly the TV cable adjustment that was changed without realizing it when you changed the carb.

Sometimes drivability problems can make you think that there's a transmission problem when there's not. Can you describe your symptoms in detail?
When accelerating, I can hear the pitch of the transmission/engine go very high and then suddenly the transmission will shift 1st-2nd and the car will lurch forward (not pleasant when the roads are slippery). When this happens I am usually going 25mph. Does the same for 2nd-3rd gear which is usually around 40-45mph. I do not have a tachometer so I don't know what RPM it shifts at.
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Old Jan 3, 2011 | 02:32 PM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Transmission Shifting Sensors?

So it gets to the point where it should shift, and it flares like it's in neutral briefly, and then goes into the next gear?
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Old Jan 3, 2011 | 02:59 PM
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Re: Transmission Shifting Sensors?

Originally Posted by Apeiron
So it gets to the point where it should shift, and it flares like it's in neutral briefly, and then goes into the next gear?
more like if it was a manual transmission and I shift almost at the red line and floor it for a second
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Old Jan 3, 2011 | 03:03 PM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Transmission Shifting Sensors?

Originally Posted by adamlinn13
more like if it was a manual transmission and I shift almost at the red line and floor it for a second
I don't understand what that means.
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Old Jan 3, 2011 | 03:05 PM
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Re: Transmission Shifting Sensors?

Originally Posted by Apeiron
I don't understand what that means.
it shifts gears at a high RPM and the car lurches forward when it shifts
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Old Jan 3, 2011 | 03:08 PM
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Transmission Shifting Sensors?

The TV cable is connected and adjusted properly?
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Old Jan 3, 2011 | 03:12 PM
  #11  
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Re: Transmission Shifting Sensors?

Originally Posted by Apeiron
The TV cable is connected and adjusted properly?
As far as I know. Is there a way for me to do this, rather than take it back to the shop that replaced it?
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Old Jan 3, 2011 | 03:19 PM
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Transmission Shifting Sensors?

Sounds like a TV adjustment issue to me. Lurching doesn't sound like any slippage. TV cable is the ONLY thing that affects shift points. Read this and adjust: https://www.thirdgen.org/detent

On your engine codes, grab a paperclip and read this: https://www.thirdgen.org/service-eng...ht-error-codes
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Old Jan 3, 2011 | 03:22 PM
  #13  
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Transmission Shifting Sensors?

Originally Posted by camaronewbie
TV cable is the ONLY thing that affects shift points.
Don't forget the governor.
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Old Jan 4, 2011 | 08:08 AM
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Re: Transmission Shifting Sensors?

Originally Posted by Apeiron
So it gets to the point where it should shift, and it flares like it's in neutral briefly, and then goes into the next gear?
I am sorry, I remembered that sometimes it does do that.
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Old Jan 4, 2011 | 08:24 AM
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Re: Transmission Shifting Sensors?

Originally Posted by Apeiron
Don't forget the governor.
Is that supposed to be a joke or a real car part?
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Old Jan 13, 2011 | 07:52 PM
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Re: Transmission Shifting Sensors?

Originally Posted by camaronewbie
Sounds like a TV adjustment issue to me. Lurching doesn't sound like any slippage. TV cable is the ONLY thing that affects shift points. Read this and adjust: https://www.thirdgen.org/detent

On your engine codes, grab a paperclip and read this: https://www.thirdgen.org/service-eng...ht-error-codes
I did the steps and it didn't work. When I pressed the metal tang (#2), pulled the cable assembly (#3) all the way back, then pulled the throttle (#1) all the way back...the cable assembly (#3) did not go back in and click a few times.


might the cable have to be adjusted at the transmission side?
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Old Jan 16, 2011 | 06:46 PM
  #17  
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Transmission Shifting Sensors?

There's no adjustment on the tranny end.

You push the metal D in, and pull so that the part on the other side of the bracket goes into the cable, then you twist the linkage to full throttle (or press the gas pedal all the way down) and it should go back out, making clicking noises as it does.
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Old Jan 16, 2011 | 07:26 PM
  #18  
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Re: Transmission Shifting Sensors?

Originally Posted by camaronewbie
There's no adjustment on the tranny end.

You push the metal D in, and pull so that the part on the other side of the bracket goes into the cable, then you twist the linkage to full throttle (or press the gas pedal all the way down) and it should go back out, making clicking noises as it does.
I pressed #2 and pulled #3 (https://www.thirdgen.org/forums/memb...etal-tang.html) towards the back of the car. Then pulled the throttle as far as it would go #1 (https://www.thirdgen.org/forums/memb...-tv-cable.html) and #3 did not go forward and click
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