Question about 1998 Chevrolet Astro

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I replaced the transmission on my 1998 Chevy Astro Van.

Park neutral switch not in alignment. Where may I acquire said tool from Hanes Manual. Will this effect my transmission from not going into my PMC module engaging my TCC to produce torque from transmission to the rear end.

Thank you

Dave

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  • davidsabo Mar 02, 2009

    Thank you for your reply. Do you know where I may acquire transmission park neutral switch tool in the Niagara Peninsula.

    thanks

    Dave


  • davidsabo Mar 02, 2009

    According to the Hanes Manual it says I need the alignment tool to position the switch into park. According to the PMC so the TCC can engage the transmission to the VSS to engage the prom switch to my prom cal-pak-mem-cal.

    thanks for your help

    Dave


  • davidsabo Mar 02, 2009

    Thank you very much sir for you help much appreciated.

    Dave


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  • Master
  • 4,669 Answers

If you put the transmission in neutral, there are two notches on the switch that will line up to adjust the switch correctly.

Posted on Mar 02, 2009

  • 1 more comment 
  • Clint Smock
    Clint Smock Mar 02, 2009

    What tool? You shouldn't need one. Although these have a problem with the plugs sticking into the switch. GM tells you to replace the switch and the plugs, but when I rebuild the transmission on these, I just unbolt the switch and leave it plugged in.

  • Clint Smock
    Clint Smock Mar 02, 2009

    Like I said though, there are two notches on the switch that will line up in neutral when you have the adjustment right.

  • Clint Smock
    Clint Smock Mar 02, 2009

    Your welcome, good luck.

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On 1992 and later models, the neutral safety switch is incorporated into the Manual Lever Position or Transmission Range MLP/TR sensor.

RENOVAL & INSTALLATION
  1. Disconnect the negative battery cable.
  2. Raise and support the vehicle safely on jackstands.
  3. Place the transmission in Neutral.
  4. Remove and discard the manual control lever nut, then remove the lever from the transmission.
  5. Detach the TR sensor electrical harness connector, remove the TR sensor retaining bolts, then pull the TR sensor off of the transmission case.
To install:
  1. Position the TR sensor against the transmission case and loosely install the 2 retaining screws.
  2. Attach the TR sensor electrical harness connector.
  3. Use an alignment tool, such as the TR Sensor Alignment Tool T93P-70010-A, to align the TR sensor slots.
  4. Tighten the TR sensor bolts to 80-100 inch lbs. (9-11 Nm).
  5. Position the manual control lever onto the TR sensor, then install the new lever nut to 22-26 ft. lbs. (30-35 Nm).
  6. Lower the vehicle.
  7. Connect the negative battery cable.
ADJUSTMENT
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Fig. : Adjusting the MLP sensor (click image for zoom)


Park is the last detent when the manual control lever is full forward. Return 2 detents toward the output shaft for Neutral.

  1. Position the manual control lever in Neutral .
  2. Raise the and safely support the vehicle.
  3. Loosen the sensor retaining bolts.
  4. Insert Gear Position Sensor Adjuster tool T93P-700 10-A or equivalent, into the slots.
  5. Align all 3 slots on the MLP sensor with 3 tabs on the tool.
  6. Tighten the attaching screws to 80-100 inch lbs. (9-11 Nm).
  7. Lower the vehicle.
Hope this helps (remember to rating ans leave a testimonial commnet about this free answer).

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Looking for the neutral safety switch


Neutral Safety/Back-up Light Switch

This is a combination switch which controls both Neutral Safety and Back-up lamp circuits.

C6 Transmission


8290dff.jpg

C6 neutral start switch
  1. Disconnect the negative battery cable.
  2. Raise and safely support the vehicle on jackstands.
  3. Remove the downshift linkage rod return spring at the low-reverse servo cover.
  4. Coat the outer lever attaching nut with penetrating oil. Remove the nut and lever.
  5. Remove the 2 switch attaching bolts, disconnect the wiring at the connectors and remove the switch.
  6. Installation is the reverse of removal. Adjust the switch and tighten the bolts to 55-75 inch lbs. (6.2-8.5 Nm).
  7. Remove the jackstands and lower the vehicle.
  8. Connect the negative battery cable.
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e7f4231.jpg

Removing the AOD neutral start switch
  1. Disconnect the negative battery cable.
  2. Raise and safely support the vehicle on jackstands.
  3. Disconnect the wiring from the switch.
  4. Using a deep socket, unscrew the switch.
  5. Installation is the reverse of removal. Tighten the switch to 10 ft. lbs. (14 Nm).
  6. Remove the jackstands and lower the vehicle.
  7. Connect the negative battery cable.
4R70W Transmission

2f68dfc.jpg


Removing the Manual Lever Position (MLP) sensor

As of 1994, the neutral safety switch is referred to as a Manual Lever Position Sensor (MLP).
  1. Disconnect the negative battery cable.
  2. Raise and safely support the vehicle on jackstands.
  3. Disengage the harness connector from the MLP sensor.
  4. Remove the 2 sensor attaching bolts and remove the sensor.
To install:
  1. Install the MLP sensor and install retaining bolts. Do not tighten, the sensor requires adjustment.
  2. Adjust the MLP sensor then tighten attaching screws to 80-100 inch lbs. (9-11 Nm).
  3. Remove the jackstands and lower the vehicle.
  4. Connect the negative battery cable.


ADJUSTMENT

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  1. Hold the steering column transmission selector lever against the Neutral stop.
  2. Move the sliding block assembly on the neutral switch to the Neutral position and insert a 0.091 in. (2.3mm) gauge pin in the alignment hole on the terminal side of the switch.
  3. Move the switch assembly housing so that the sliding block contacts the actuating pin lever. Secure the switch to the outer tube of the steering column and remove the gauge pin.
  4. Check the operation of the switch. The engine should only start in Neutral and Park .

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4cc4151.jpg


Adjusting the MLP sensor

Park is the last detent when the manual control lever is full forward. Return 2 detents toward the output shaft for Neutral.
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  3. Align all 3 slots on the MLP sensor with 3 tabs on the tool.
  4. Tighten the attaching screws to 80-100 inch lbs. (9-11 Nm).

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