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Chevrolet transmissions & drivetrains repair questions and answers

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  • AutoMD Member
    AutoMD Member - 1980 Chevrolet C10 - Transmissions & Drivetrains - 3/7/2014
    I took the shifter and plate off of transmission to replace clutch but forgot to leave the gear in neutral.
    I left the truck in gear removed transmission shifter plate on top did the clutch replacement put the shifter plate back tightened everything up turned truck on and its stuck in gear when I start the truck it tries to take off. Confused as how to get the gears back ...
     
    • HouseCallAuto
      3/7/2014 HouseCallAuto
      I think that you can see the place where the shifter engages with the shift mechanism in the tranny and you can move them back with a suitable long reach tool. I even remember something like this happening to me maybe more than 20 years ago.
  • AutoMD Member
    AutoMD Member - 1991 Chevrolet S10 - Transmissions & Drivetrains - 3/5/2014
    4x4 front wheels won't engage
    when engaged made a clunk sound and the wheels did not engage
     
    • Welder95
      3/5/2014 Welder95
      Your transfer case maybe going out. might look into getting new transfer case or getting it rebuilt
    • Welder95
      3/5/2014 Welder95
      make sure your hubs are locked, could be transfer case.
  • Travis
    Travis - 2008 Chevrolet Aveo - Transmissions & Drivetrains - 3/1/2014
    Need to know if there's a flashover process for the PCM or ECM to fix trouble code P 2716
    I know what the code is just wondering if this will work or not
     
    • Jimm
      3/1/2014 Jimm
      P2716 = Pressure Control Solenoid ā€œDā€ Stuck On

      Possible Causes:

      Shift solenoid (SLT) connector is damaged (check pins for damage, moisture)
      Shift solenoid (SLT) control circuit is open or shorted to ground
      Shift solenoid (SLT) has failed (electrical fault)
      ECM has failed

      Check with the dealerships - often the ECM is under an extended warranty and may be replaced for free. The reflash / reprogramming of either the PCM or ECM will need to be completed by the dealerships.
  • AutoMD Member
    AutoMD Member - 1997 Chevrolet C1500 - Transmissions & Drivetrains - 2/28/2014
    Why is there sporadic acceleration jumpiness and speedometer not working right after a new speed sensor was put in truck
    We just had a new Speed Sensor put in our 1997 Chevy Silverado because it was not shifting out of low gear. Now when I accelerate there sporadic jumpiness, though no change in pressure on the accelerator. Also the speedometer isn't working right now and the gauge ...
     
    • Jimm
      2/28/2014 Jimm
      On GMC models made before 1996, disconnect the battery to clear all the trouble codes stored in the computer. On vehicles made after 1996, clear the codes using an automotive scan tool. Test-drive the truck to verify the repair.

      The scan tool can be found at any local auto parts store - they will usually read and reset any codes for free.

  • horace
    horace - 2002 Chevrolet Trailblazer - Transmissions & Drivetrains - 2/28/2014
    How do I know if my auto Trans has to be replaced?
    When I put my vehicle in drive I have to press the accelerator really hard to get vehicle to move or put the Trans in low gear 2 When I'm driving, the transmission is not switching gears
     
    • Jimm
      2/28/2014 Jimm
      Most likey due to a pump failure, or loss of fluid. Remove transmission and rebuild, or refill pan and find the leak.
      If out of fluid, avoid running the engine until the transmission is refilled to avoid pump damage. To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. If level does not go down when engine is running, the pump is broken.
      Jimm
      2/28/2014 horace
      It's not leaking fluid and the flu dis not dark
      Jimm
      3/1/2014 horace
      I did the fluid check and the fluid level changes with the engine on the level drops
  • Apache
    Apache - 1998 Chevrolet Tahoe - Transmissions & Drivetrains - 2/27/2014
    I was driving at 57mph on cruse control (98 Tahoe 4wd 4L60e tranny, 5.7 engine) felt a light thud. rpm suddenly shot up
    in idle tranny fluid level is very high like pump not working.
     
    • HouseCallAuto
      2/22/2014 HouseCallAuto
      I agree, the pump went out and the typical detail that I always see is a high fluid level right after that as all the fluid settles in the bottom of the unit. Its no different than checking the unit with the engine off. You need a transmission.
      HouseCallAuto
      2/23/2014 Apache
      can I just replace the pump. it was rebuilt about 2 years ago. the fluid is very good almost no debris on the magnet. I have already removed the tranny.
      HouseCallAuto
      2/23/2014 HouseCallAuto
      I don't see why not. The hardest part is already done. Good work.
      HouseCallAuto
      2/25/2014 Apache
      OK changed the pump it drives but...in drive no third gear, high rpm, rpm gauge fluctuates no speedometer. are the wires are wrong?
    • HouseCallAuto
      2/25/2014 HouseCallAuto
      Vehicle speed sensor not making signal. Is there a fault code stored P0500 or P0501?
      HouseCallAuto
      2/27/2014 Apache
      Only fault code is P0102 (MAF) which I know about. I reset and retested. Installed new 1-2 and 3-4 shift solenoids. Now the ABS light is on. in drive no 3rd gear, have manually shifted from 1-2-3, the gears are there, no overdrive. Was working fine before the pump went. Can the harness be connected wrong? Don't get it.
    • HouseCallAuto
      2/27/2014 HouseCallAuto
      There is a problem with the vehicle speed sensor which on a 4wd is located on the transfer case. There are two, a front speed sensor and a rear speed sensor. Check your connectors and wiring that goes to their connections at the transfer case.
  • Travis
    Travis - 2008 Chevrolet Aveo - Transmissions & Drivetrains - 2/27/2014
    Getting trouble code P 2176. Wondering what it means and what all steps I need to do to fix it
    Iling very rough will not go over 20 miles an hour
     
    • Jimm
      2/27/2014 Jimm
      P2176 = Minimum Throttle Position Not Learned
      The P2176 code is set whe the difference between the predicted and the actual throttle position is more than a calibrated amount for more than 1.5 seconds.

      Possible causes:

      - Faulty Throttle Actuator Control (TAC) module
      - Throttle Actuator Control (TAC) module harness is open or shorted
      - Throttle Actuator Control (TAC) module circuit poor electrical connection
      - Throttle plate sticking due to carbon build-up
      - Engine Control Module

      Jimm
      2/27/2014 Travis
      Thank+you+for+the+information+I%27ll+see+what+I+can+find+out
  • AutoMD Member
    AutoMD Member - 2004 Chevrolet Suburban 1500 - Transmissions & Drivetrains - 2/27/2014
    Transmission indication does not illuminate
    about 133000 miles on vehicle and it occures all the time
     
    • Jimm
      2/27/2014 Jimm
      Replace the indicator bulb and check the socket and wiring / connections. The issue may also be related to the ignition switch - check this webste for further information; www.howstuffinmycarworks.com/GM_truck_bad_ign.html
  • impossible install
    impossible install - 1994 Chevrolet Camaro - Transmissions & Drivetrains - 2/24/2014
    Installing motor and transmission
    im installing a LT1 motor into a GMC 2500 sierra and i have a 700r4 trany i have the ecm (brain and harness)for the motor but plugs dont match trany what do i need to do to make this work aside from getting a 4L60E trany
     
    • HouseCallAuto
      2/24/2014 HouseCallAuto
      There is no workaround for this situation that I ever heard of. There is no "adaptor" that will make this work.
      HouseCallAuto
      2/24/2014 impossible install
      thank you i was afraid of that
  • AutoMD Member
    AutoMD Member - 2004 Chevrolet Impala - Transmissions & Drivetrains - 2/23/2014
    In any gear drive through first when starting off the rpm's raise to 3000 before the car moves.like it being held back
    Once moving it shifts gears fine but has no over drive when you hit the gas.The performance isn't there. If you step on the gas in reverse she will snap your head foward. I also had smoke in the drivers compartment before this happened and my heater and air will not ...
     
    • HouseCallAuto
      2/23/2014 HouseCallAuto
      There has to be fault codes stored. Do you want to try to diagnose this yourself or you are looking to get info on what to expect a shop might tell you?
  • Apache
    Apache - 1998 Chevrolet Tahoe - Transmissions & Drivetrains - 2/22/2014
    I was driving at 57mph on cruse control (98 Tahoe 4wd 4L60e tranny, 5.7 engine) felt a light thud. rpm suddenly shot up
    in idle tranny fluid level is very high like pump not working.
     
    • alex
      2/22/2014 alex
      the input shaft is pretty tough . but to check the pump you could unhook a trans cooler lines start it and see if its pumping oil no matter what let go the trans will have to come out. you could pull it yourself but most trans shops wont warrenty it unless they put it in. also your trans cooler. chunks of metal will get pushed into it and there's no way to clean it all out and it will wreck a new tranny.
  • Apache
    Apache - 1998 Chevrolet Tahoe - Transmissions & Drivetrains - 2/22/2014
    I was driving at 57mph on cruse control (98 Tahoe 4wd 4L60e tranny, 5.7 engine) felt a light thud. rpm suddenly shot up
    in idle tranny fluid level is very high like pump not working.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2000 Chevrolet Silverado 1500 - Transmissions & Drivetrains - 2/22/2014
    What would cause severe shaking of front end while turning in 4WD?
    Seems like one wheel is trying to "catch up" with the other one. Much worse in low range but probably due to higher engine speed. Have replaced both CV axles, grease in the front differential. Does this only in 4 WD, and when not turning everything works smoothly.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2004 Chevrolet Malibu - Transmissions & Drivetrains - 2/21/2014
    Why did my car did not started up and nothing worked
    I parked my car this morning and could not lock the car with keyless remote, when I try to start the car up nothing worked, This was the first time this happening. I removed the battery cover and checked the battery (fine) turned the ignition key and car started ...
     
    • HouseCallAuto
      2/21/2014 HouseCallAuto
      Not enough to go on to advise. There might be a fault code stored in the PCM or BCM but reading the BCM code requires a professional scan tool.
  • AutoMD Member
    AutoMD Member - 1991 Chevrolet Blazer - Transmissions & Drivetrains - 2/20/2014
    Looking for a reputable automatic transmission shop in the Portland Or metro area
    I have a 1991 Chevy full size Blazer 4x4 with TH700R4 transmission. was driving suddenly it acted like it slipped into neutral and that was it no more gears There was a slight vibration in park when cold at start up. fluid levels full and fairly recent change. now ...
     
    • Jimm
      2/20/2014 Jimm
      Use the 'Find-A-Shop', Estimate Cost and instant quotes features on the AutoMD website to locate a transmission repair shop in your area. Also, try word-of-mouth - ask around for recommended and trusted repair shops - often this is the best advertsing anyway.
    • HouseCallAuto
      2/20/2014 HouseCallAuto
      *Consider* buying your own rebuilt transmission and then you can have a choice of many more shops that can just "install" your unit. You will not be forced to deal only with tranny shops. Sometimes it works out better.
 
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