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Chevrolet transmissions & drivetrains repair questions and answers

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  • hinton
    hinton - 1997 Chevrolet Blazer - Transmissions & Drivetrains - 1/5/2014
    4 wheel drive will not engage,
    button blinks,makes a clicking noise,goes out but front wheels will not engage
    • HouseCallAuto
      1/5/2014 HouseCallAuto
      Has a greater than 75% probability of a bad encoder motor on the outside of the transfer case.
      1/6/2014 AutoMD Member
      It probably is your transfer case control module and it is located under the passenger side kick panel. If you disconnect it and clean the pins of any oxidation it should start working. does your 4x4 light just blink then go off? I had the same problem and bought a new module and it did the trick. junk yard about $40.00 bucks hope this helps.
  • Jon Simon
    Jon Simon - 1995 Chevrolet C1500 - Transmissions & Drivetrains - 1/5/2014
    Why does my vehicle operate poorly when the needle gauge re tach and speedometer and gear location tab not working
    occasionally the needle gauge for tach and speedometer (all other needle gauges still operate) fail to work and gear location tab illumination fades on and off; when this occurs, my truck does not shift gears properly, engine whines and it feels as though the ...
    • bear.1216
      1/5/2014 bear.1216
      Your transmission is electronically controlled. It takes readings from the Vehicle Speed Sensor(VSS) to controll shifting and the Engine Control Module(ECM) uses the VSS readings to calculate engine load. The VSS also affects the speedometer. You likely have a problem with the VSS. This sensor usually sets a trouble code and triggers the check engine light. Is your check engine light on. You should have the vehicle scanned for diagnostic codes. Autozone will scan it for free.
  • Lewis Krasniak
    Lewis Krasniak - 1995 Chevrolet S10 - Transmissions & Drivetrains - 1/3/2014
    When I shift into drive or reverse, the engine just revs like its in neutral. What is the cause? Blocked convertor???
    The tailpipe has been knocked off, but I run it as a plow truck without any problems until now.
  • ChevyGuy
    ChevyGuy - 2005 Chevrolet Silverado 1500 - Transmissions & Drivetrains - 1/2/2014
    How much does it cost to do a tranny flush on a Chevrolet Silverado 1500?
    I just change the tranny fluid and filter and now when I shift to R or D it makes a clunking noise, it wasn't like that before?
    • HouseCallAuto
      1/2/2014 HouseCallAuto
      I don't see how the fluid and filter change would cause this. The tranny fluid change would cost about $150 to $175
      1/2/2014 ChevyGuy
      Can over filling the tranny fluid cause it to make a clunking noise when shifting into R or D?
      1/2/2014 HouseCallAuto
      Unknown, make sure it is filled proper. If you mean a quart overfilled no that cannot do anything. 4 or 5 quarts I have no idea, never experienced that.
      1/3/2014 ChevyGuy
      Thank you!
  • AutoMD Member
    AutoMD Member - 1997 Chevrolet Blazer - Transmissions & Drivetrains - 1/2/2014
    I was driving on the freeway and notice a lot of smoke come from the back and i went to exit and the car now wont drive
    black oil in the back axle area
    • HouseCallAuto
      1/2/2014 HouseCallAuto
      Not much to go on what you have said. What do you mean the "car now won't drive" ? This statement has no accompanying detail for me to picture what does not work?
  • glenda
    glenda - 2006 Chevrolet Trailblazer - Transmissions & Drivetrains - 1/2/2014
    What part holds the gear shift underneath the vehicle, when I tried to put my car in gear, it wouln't engage in any gear
    I stopped and placed the car in park. When I went to put it in gear it would't engage at all. A friend said that it was a easy fix and just needed to be reattached but he lacked the clamp or what ever held it on / in. What is underneath the car that helps the ...
    • Ali
      1/2/2014 Ali
      i think it's the shift stick link....needs adjesting
  • AutoMD Member
    AutoMD Member - 1998 Chevrolet K3500 - Transmissions & Drivetrains - 1/1/2014
    Why does front axle actuator not disengage front axle
    How do I check all electrical components and where are they located
    • HouseCallAuto
      1/1/2014 HouseCallAuto
      The 4WD system is no different than diagnosing the engine with fault codes. You need an appropriate code reader that can access the transfer case codes. These are C codes as opposed to P codes that the engine diagnostics gives. I believe that there are no inexpensive scanners that are sold to access these codes, only the expensive snapon and OTC Genisys scanners. However, you could buy a functioning OTC Genisys that will access your Chevy transfer case codes on ebay for under $500 if you were feeling a long term relationship with your vehicle. Nobody skips reading codes and just begins testing components because the testing procedures are all based upon action taken after knowing what code is there. Without a scan tool that can read codes and live data you are certain to replace unnecessary parts. It is possible that someone that works on these all the time might just know the probable cause based upon your description, not sure. I work with codes and then go to the procedure charts with the code present.
      1/1/2014 HouseCallAuto
      can you read the tag on the rear of the transfer case and tell me what model transfer case is in the truck? New Venture 241 or 243 or Borg Warner 4401 or 4470 ?
  • AutoMD Member
    AutoMD Member - 1986 Chevrolet C20 - Transmissions & Drivetrains - 1/1/2014
    Is a carrier bearing pressed on drive shaft & if not how do I get bearing off
    carrier bearing stuck on drive shaft.I have used penetrating oil & hammer,punch still want move.Need advice on getting it off.
    • HouseCallAuto
      1/1/2014 HouseCallAuto
      A carrier bearing is the bearing that is inside the rear axle housing on each side of the differential carrier. If you mean the "center support bearing" on the driveshaft, that has to be pressed off and on.
  • AutoMD Member
    AutoMD Member - 1995 Chevrolet Camaro - Transmissions & Drivetrains - 12/30/2013
    Why does my car get sluggish when I let off of the accelerator like I am applying my brakes
    While driving when I take my foot off of accelerator, car begins to slow down instead of coasting normally to a gradual stop. Seems as if brakes are engaged, but they are not (including emergency brake). Car also has a weird burnt odor, but there is no smoke coming ...
    • HouseCallAuto
      12/30/2013 HouseCallAuto
      It does seem like you are describing brakes that are dragging like as in a bad caliper or brake hose. The strategy here to determine or rule out dragging brakes is to jack up each front wheel as soon as you can do it after feeling these symptoms. You may find that one of the wheels does not want to turn by hand. Another way is to use an infrared thermometer (harbor freight (under $20) and measure the brake rotor temperature from left to right. (a dragging brake will have excessive temperature and will not be even close to the other wheel temperature. And a temp check can be done withing a minute of pulling over while problem still exists (does not have time to cool down)
  • AutoMD Member
    AutoMD Member - 1995 Chevrolet Camaro - Transmissions & Drivetrains - 12/30/2013
    Why does my car get sluggish when I let off of the accelerator like I am applying my brakes
    While driving when I take my foot off of accelerator, car begins to slow down instead of coasting normally to a gradual stop. Seems as if brakes are engaged, but they are not (including emergency brake). Car also has a weird burnt odor, but there is no smoke coming ...
    0 answer
  • AutoMD Member
    AutoMD Member - 1998 Chevrolet Cavalier - Transmissions & Drivetrains - 12/29/2013
    Can I replace motor mounts with parts from a 2004 cavalier
    One motor mount for the 1998 retails for about $124 and I cant afford that.
    • Jimm
      12/29/2013 Jimm
      The parts are readily available; try these on-line sources;,,,, - to list only a few possibilities. In fact they (RockAuto) list the motor mounts from around $18.00 each for your vehicle.

      Always use new motor mounts and not used - for safety sake, you already have used ones on your vehicle - why take more changces?
  • Jon Simon
    Jon Simon - 1995 Chevrolet C1500 - Transmissions & Drivetrains - 12/27/2013
    Why does my truck operate poorly when needle gauge for tach and speedometer and gear position light is not illuminated?
    Only the two needle gauges (tach and speedometer) and gear position light (light fades on and off) do not work but the needle gauges on the right side of dashboard work fine. When this occurs, the truck performs at 10%; i.e. the transmission doesn't shift and the ...
    • HouseCallAuto
      12/26/2013 HouseCallAuto
      I think you have a bad ignition switch.

      1. Locate connector C266 near the steering column and check for Battery Voltage (B+) on the Pink wire pin C5 when the problem is happening.

      2. If there is less than B+ at pin C5 check for B+ on the Red wire pin D2 and D5 of the same connector.

      3. If there is B+ on the Red wires but less than B+ at pin C5 replace the ignition switch.

      4. Here is a pinout picture of C266 >>
      12/26/2013 Jon Simon
      thank you very much-that is the first solid attempt anyone has made to logically diagnose & explain the procedure to confirm. I will update you on my progress.
    • HouseCallAuto
      12/27/2013 HouseCallAuto
      In other words, if the ignition switchs heats up and fails internally, the result might be voltage that is less than the 13 to 14.5 volts that should be coming out of the ignition switch that feeds multiple things (including the instrument panel cluster) and there are no set rules when low voltage is thrown out there so the result could be illuminating half the cluster and other unforseen anomalies. Electronic modules that were designed to function on 12 volts act strangely when they are forced to survive on lets say 7 or 8 volts. The transmission is also controlled by the vehicle computer (PCM). I think you get what I'm sayin'.
  • Jesse
    Jesse - 2003 Chevrolet S10 - Transmissions & Drivetrains - 12/25/2013
    Replaced the transfer case switch, the slamming noise is gone but not getting full 4 wheel drive in 4hi or 4lo
    0 answer
  • AutoMD Member
    AutoMD Member - 2006 Chevrolet Cobalt - Transmissions & Drivetrains - 12/25/2013
    Car moves fine in reverse, won't move in drive
    when car is put in drive the rear end squats down, front tires move freely but rear tires are locked up
    • HouseCallAuto
      12/25/2013 HouseCallAuto
      Something about the parking brake maybe. Rear brakes are locked up, can't be transmission if front wheels move free and rears are locked up, front drive vehicle.
  • kcsunshine7
    kcsunshine7 - 2002 Chevrolet Monte Carlo - Transmissions & Drivetrains - 12/21/2013
    Driving down the road the car will turn off for a split second or just jerk
    The car feels like it is going to shut off all by itself. It sort of sputters for a complete second and then continues on . Current mileage 104000. First noticed last week. Had someone road test it on Sunday and it happened twice. Put it on the code meter on to see ...
    • HouseCallAuto
      12/21/2013 HouseCallAuto
      Try cleaning the mass air flow sensor or replace it, quick DIY easy job. Can be several different things. Possible bad crank sensor as well. Look for a code to set eventually.
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