Question about 1999 Chevrolet Astro

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Code Reader reads Shifter Solenoid Stuck or Off

Transmission refuses to shift out of 3rd gear.
Code reader says Shifter Solenoid stuck or off.
1997 Chevy Atsro Van has new transmission.

Can anyone tell me where the shifter solenoid sensor is on this Astro.

DEalker says something worng with new transmission?
Help/

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  • bsteletrance Feb 11, 2009

    Thanks transmision is new factory transmission and has new solenoids?

    Is there any such thing as an electrical sensor that sends signals to the pcm besides the vehicle speed sensor that could be sending false siognal to the TCC?

  • bsteletrance Feb 13, 2009

    Thanks

    Checked solenoids
    Both are nbew
    Problem still exists. Transmision shop says something electical is causing TCC to stick.

    Any suggestions on electical sensors other than the VSS.?

  • Anonymous Mar 13, 2014

    i have a 04 LS430, the mechanic tells me the shift solenoid is the problem. Do i have to replace the whole transmission, or can that part be replaced?

  • Anonymous Mar 15, 2014

    the shifter is stuck in park and the button will not go in to release the shifter

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The Shift solenoids are located in the transmission oil pan. I would recommend replacing both shift solenoids while you're in there. Also replace the filter and pan gasket. The shift solenoids are located towards the rear of the valvebody and will be identical to each other. They are held in place by a retaining clip which is easily removed with a small screwdriver or similar tool. Care must be taken as parts may fly out of the bore when the solenoids are removed. Hope this helps.

Posted on Feb 10, 2009

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Had starter replaced yesterday now tcs and check engine lights on and the d is flashing hooked up code reader and got code p0798 whats that how do i fix.not having this problem till fixed starter


- Low transmission fluid level
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- Pressure control solenoid valve 'C' harness is open or shorted
- Pressure control solenoid valve 'C' circuit poor electrcial connection

Read more: http://engine-codes.com/p0798_honda.html#ixzz3YiQY8JvC

The Engine Control Module (ECM) uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical troubles of the shift solenoid valves and valve body.

Read more: http://engine-codes.com/p0798_honda.html#ixzz3YiQOwwGc

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P732 and p1529


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Codes p0700,p0733,p0734 dodge caravan 1997


P0700 is a informative transmission code, about some problem there; the P0733 and P0734 is the specific problem there.
I would first try changing the fluid and filter. Although the fluid may look like it is brand new, with 100K on the fluid, I can assure you that even if those miles were all highway at steady speed and no load that the fluid has deteriorated and no longer lubricating the internal parts properly and that there is some debris in the ******.If codes return and shifting problems are still present, there is definite internal failure, possibly the pump or in the clutches.
DTC P0733The powertrain control module (PCM) uses the crankshaft position (CKP) sensor, input speed sensor (ISS) and output speed sensor (OSS) to determine engine speed, input shaft speed and output shaft speed. These sensor readings are used to determine the current gear ratio and RPM slip across the torque converter. The PCM uses this information from the sensors to determine if the commanded gear matches the actual gear. During normal driving conditions, the PCM will adapt main line pressure via the pressure control (PC) solenoid to prevent slipping and harsh shifts. Shift solenoid 3 is used to apply or release third gear clutch. The PCM controls 3rd gear by controlling the ground for shift solenoid 3. The PCM will turn the solenoid OFF, open the driver circuit, when 3rd gear is commanded On to apply 3rd clutch. Shift solenoid 3 is supplied ignition voltage from the fuel pump relay whenever the PCM commands the fuel pump relay ON. DTC P0733 sets when 3rd clutch still slips after the PCM has commanded high main line pressure.DTC Parameters
DTC P0733 will set if the PCM detects an incorrect actual 3rd gear ratio when 3rd gear is commanded On when:- The condition exists for longer than 3 seconds (2001)*- The condition exists for longer than 3 seconds, 1 minute is allowed to elapse, then condition exists again for longer than 3 seconds (2000)- The high main line pressure has been commanded- The transaxle is in a forward gear- The input speed is greater than 224 RPM- The vehicle speed is greater than 5 km/h (3 mph)- The speed noise parameter = NO- The steady state ratio fail counter equals 255 for an in-gear failure, or the shift fail counter is greater than 100 on a downshift or upshift to 3rd gear (128=0 or normal operation)DTC P0733 diagnostic runs continuously once the above conditions have been met.
DTC P0733 is a type A DTC for 2000, type B for 2001.**Applicable to vehicles built after June 2000.
Diagnostic AidsImportant: If DTCs P0745, P0746, P0756, P0758, P0761, P0763, P0766, P0768 or P0789 is set, diagnose that DTC first. A diagnosed PC solenoid, shift solenoid 2, 3 or 4 low/high circuit fault DTC may have caused DTC P0733 to set.Important: If a shift solenoid performance DTC P0783, 4th gear stuck ON, is set, diagnose that DTC first. A 4th gear stuck ON may cause no 3rd gear, no 2nd gear, or TCC stuck Off.
Refer to Pressure Ports - Air Check and Parts Description for pressure apply points and for component/location description.
Possible causes of no 3rd gear are listed in the flowchart on the succeeding page.
Verify TRANSMISSION ISS and TRANSMISSION OSS read correctly on Scan tool.
Make sure the pressure control, shift 2, shift 3 and shift 4 solenoids are not intermittently sticking. A sticking shift solenoid 4 may cause 4th gear to be applied from an initial start resulting in no 3rd gear. Audible sound should be similar for all solenoids. A muffled tone indicates the need for replacement.
Check this pinout HERE
P0734 refer at ratio 4 gear, and the rocedure is the same.
Hope helps.

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If it's an automatic, then there is an internal problem to the transmission. Possibly the shift solenoid is plugged up or damaged or defective.

If it's an automatic and you can't shift out of the 3rd gear, at the shifter, then there is a problem with the transmission linkage, maybe.

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I have a 1991 GMC Sierra 1500 with a 5L V-8. The transmission is nit shifting into 3rd gear from second properly. Also the rpms are high from 50 km/h to 90 km/h when 4th gear engages. When scaned the code...


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Sounds like you might have serious internal transmission problems.

As soon as you can, get someone with a code reader to plug in the vehicle and find out what the code is for the Check Engine light to come on. Might give you a better picture of what`s going on.

It could also (cross your fingers) be something more usual like a clogged transmission filter (located inside the pan), or shift solenoid.

By the way, have you checked the level, look & smell of your transmission fluid?

Level should be checked with the vehicle running, after passing it in all gear ranges on the shifter, and putting it back in park (Check it on "cold" or "hot" level depending on if it`s been driving for a while or not).

As for look and smell, it should be reddish and not smell burnt. Hard to describe the smell of burnt transmission fluid, but normal fluid does not smell too strongly, kind of sweet. Burnt oil is usually black and has a strong odor. If the oil is burnt you have internal damage to the transmission.

One piece of advice I give you is get it fixed as soon as possible because if you don`t already have serious internal transmission problems, the longer you wait, the more chances you have of getting some, to the point of the vehicle just refusing to move. And believe me, speaking from experience, the transition point from the symptoms you describe to total refusal to move and the need for a tow/transmission rebuild is not that long usually.

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