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Transmission not shifting 2000 silverado 2500

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by steverocks6, Apr 21, 2012.

  1. steverocks6

    steverocks6 Member

    2000 chevy silverado 2500 A/T.

    ok, well i had the issue with my guages, i just ended up re-wireing them in because the feed off the fuse box was putting out bearly any voltage, so i thought that was messing up my truck not shifting. but basicly i have no overdrive or 3rd, well im assuming no third but i may, if i was to go 50 my truck will be rev'd up to around 300-3500 rpm's. now i know people with similar issues have said it could be a ignition switch, now is there a simple way to test/fix a bad electrical part on the ignition switch? also the wire i replaced was the ign 1 fuse box wire.
  2. Blazer454

    Blazer454 Member

    So did it go into 3rd before you fixed the wiring?
  3. dipstick

    dipstick Member 2 Years 100 Posts

  4. Jason2325

    Jason2325 Member

    Are you rebuilding it?
  5. steverocks6

    steverocks6 Member

    its not a clutch issue, and it stoped shifting when the guages started to die out, i hard wired gauges just so i wouldnt loose tach or speed due to fact that with tranny not shifting i wanted to keep good eye on all my gauges, its something electrical because it will shift into 3rd or overdrive randomly but kicks itself out of it basicly right after shifting into it
  6. Jason2325

    Jason2325 Member

    How many miles are on it? You'r trany is 12 years old honestly if I where you I would just replace it but that is just me.
  7. steverocks6

    steverocks6 Member

    just because the truck is 12 years old doesnt mean the tranny is, but its not a transmission issue its something electrical within the column or dash
  8. carmantx

    carmantx Member

    4wd or 2wd?

    Check your speed sensors, either on the back of the trans if 2wd, or on the transfer case if it is 4wd. If the system isn't reading the vehicle speed, it won't let it shift.

    Is your speedometer working?
  9. dipstick

    dipstick Member 2 Years 100 Posts

    Could be a lot of things vss...drac..speedo..tach..abs...maf..tps...map...ecm...bad wire in harness ...bad ground..ignition switch.
    brake switch ..list goes on. Need to scan it for codes will sure help get you in right direction .
  10. Brad Preece

    Brad Preece New Member

    #08-07-30-027: No Movement When Transmission is Shifted to Drive or Third - Normal Operation When Shifted to Second, First or Reverse (Replace Forward Sprag Assembly) - (Jul 1, 2011)
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    [TD="width: 7%"]Subject:[/TD]
    [TD]No Movement When Transmission is Shifted to Drive or Third — Normal Operation When Shifted to Second, First or Reverse (Replace Forward Sprag Assembly)[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
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    [TD="width: 7%"]Models:[/TD]
    [TD]1982–2005 GM Passenger Cars and Light Duty Trucks[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
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    [TD="width: 7%"][/TD]
    [TD]2006–2007 Buick Rainier[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
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    [TD="width: 7%"][/TD]
    [TD]2006 Cadillac Escalade, Escalade ESV, Escalade EXT[/TD]
    [/TR]
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    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]2006 Chevrolet SSR[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]2006–2008 Chevrolet Avalanche, Colorado, Express, Silverado Classic, Silverado, Suburban, Tahoe, TrailBlazer[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]2006 GMC Yukon Denali, Yukon Denali XL[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]2006–2008 GMC Canyon, Envoy, Savana, Sierra Classic, Sierra, Yukon, Yukon XL[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]2006 Pontiac GTO[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]2006–2007 HUMMER H2[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]2006–2008 HUMMER H3[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]2006–2008 Saab 9-7X[/TD]
    [/TR]
    [/TABLE]

    [TABLE="width: 95%"]
    [TR]
    [TD="width: 7%"][/TD]
    [TD]with 4L60, 4L60E, 4L65E or 4L70E Automatic Transmission (RPOs MD8, M30, M32, M33 or M70)[/TD]
    [/TR]
    [/TABLE]

    [HR][/HR]Condition

    Some customers may comment that the vehicle has no movement when the transmission is shifted to DRIVE or THIRD position, but there is normal operation when it is shifted to SECOND, FIRST or REVERSE position.
    Cause

    This condition may be caused by a damaged forward sprag assembly (642).
    Correction

    When inspecting the sprag, it is important to test the sprag for proper operation by holding the outer race (644) with one hand while rotating the input sun gear (640) with the other hand. The sun gear should rotate only in the counterclockwise direction with the input sun gear facing upward. If the sprag rotates in both directions or will not rotate in either direction, the sprag elements should be inspected by removing one of the sprag assembly retaining rings (643). Refer to SI Unit Repair section for forward clutch sprag disassembly procedures.
    If the sprag is found to be damaged, make repairs to the transmission as necessary. A new forward roller clutch sprag assembly is now available from GMSPO.

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    If clutch debris is found, it is also very important to inspect the Pressure Control (PC) solenoid valve (377) fluid screens. Clean or replace the PC solenoid (377) as necessary. It is also important to flush and flow check the transmission oil cooler using J45096. Refer to SI Automatic Transmission Oil Cooler Flushing and Flow Test for the procedure.

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    [TABLE="width: 40%"]
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    [TD="align: center"](1)[/TD]
    [TD="align: left"]The notches above each sprag must point up as shown when assembled into the outer race.[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](637)[/TD]
    [TD="align: left"]Bearing Assembly, Input Sun Gear[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](638)[/TD]
    [TD="align: left"]Snap Ring, Overrun Clutch Hub Retaining[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](639)[/TD]
    [TD="align: left"]Hub, Overrun Clutch[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](640)[/TD]
    [TD="align: left"]Wear Plate, Sprag Assembly[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](641)[/TD]
    [TD="align: left"]Retainer and Race Assembly, Sprag[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](642)[/TD]
    [TD="align: left"]Forward Sprag Assembly[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](643)[/TD]
    [TD="align: left"]Retainer Rings, Sprag Assembly[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](644)[/TD]
    [TD="align: left"]Outer Race, Forward Clutch[/TD]
    [/TR]
    [/TABLE]
    [TABLE="width: 40%"]
    [TR]
    [TD="align: center"](660)[/TD]
    [TD="align: left"]Washer, Thrust (Input Carrier to Race)[/TD]
    [/TR]
    [/TABLE]
    The following information applies when this sprag is used in 1982-86 transmissions.
    The new design sprag can be used on models 1982 through 1986, by replacing the entire assembly (637 — 644). Individual components are NOTinterchangeable.
    Important: The wear plate (640) and input thrust washer (660) are not required with the new sprag. Use of the thrust washer and wear plate with the new sprag assembly will cause a misbuild (correct end play cannot be obtained).
    Parts Information



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    Description

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    [TD="align: center"]
    24241477

    [/TD]
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    Sprag, Forward Clutch

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    [TD][/TD]
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    [/TABLE]
    Warranty Information

    For vehicles repaired under warranty, use:

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    Description

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    Last edited by a moderator: Aug 20, 2014

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