Transfer Case Switch
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Transfer Case Switch
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Dorman - Help Transfer Case Switch

Part No. 49315 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

The harsh conditions underneath your car can degrade exposed parts. However, our Transfer Case Switch resists corrosion and water intrusion, meaning Four-Wheel Drive smoothly and consistently engages.

Product Features:
  • Direct replacement for a proper fit every time
  • Easy to install
  • Weather-resistant for long-lasting use
  • Quality tested to ensure durability
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REVIEW SNAPSHOT®

by PowerReviews
Dorman - HelpTransfer Case Switch
 
2.7

(based on 7 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (3)

57%

of respondents would recommend this to a friend.

Pros

  • Easy to use (6)

Cons

No Cons

Best Uses

  • Trucks (3)
    • Was this a gift?:
    • No (3)

Reviewed by 7 customers

Displaying reviews 1-7

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1.0

Spend the extra money

By 

from WI

About Me Auto Enthusiast

Pros

  • Easy To Use

Cons

  • Doesn't work

Best Uses

    Comments about Dorman - Help Transfer Case Switch:

    Spend the extra money. Take my advice. This does not work.
    My old switch was "stuck" and caused grinding noise up in the front axle. This did not fix it, but the one ordered from GM DID.

    Comment on this reviewHelp Icon

    (1 of 1 customers found this review helpful)

     
    1.0

    Do not purchase

    By 

    from Chambersburg, Pa

    About Me Mechanic

    Pros

    • Easy To Use

    Cons

    • Doesn't Seal

    Best Uses

    • None

    Comments about Dorman - Help Transfer Case Switch:

    Purchased 2 of these as replacements for my 2000 Sonoma & my brother's 98 Blazer. Within 2 weeks I had transmission fluid in my entire HVAC system & found the start of the same issue in the Blazer. $165 in parts later my HVAC is working again. Thinking I had gotten some bad ones, I purchased 2 more from a different store. Doing a vacuum test on the first unit indicated it worked as intended. Preforming the same test on the 2nd one showed it was defective right out of the package. 3 of 4 of these have been bad. I'm going to go to the dealership for a GM replacement & forget about these cheap units.

    • Was this a gift?:
    • No

    Comment on this reviewHelp Icon

    (5 of 9 customers found this review helpful)

     
    5.0

    Fast, easy, inexpensive.

    By 

    from Savage, Minnesota

    About Me Casual Driver

    Pros

    • Easy To Use

    Cons

    • None

    Best Uses

    • Trucks

    Comments about Dorman - Help Transfer Case Switch:

    99 Blazer would not fully dis-engage from 4WD. When trying to put in 2WD, there was a grinding noise coming from front end. Went away when in 4WD, came back in 2WD. Installed this part and problem solved. Switches back and forth with no problem. Grinding noise gone! Part sits on top of transfer case and is hard to see from under truck. I used a mirror and flash light which made the job a breeze. 5 min repair! You need a 7/8 inch wrench to install and don't forget the little rubber gasket. Use the old one because new part does not come with one.

    • Was this a gift?:
    • No

    Comment on this reviewHelp Icon

    (4 of 8 customers found this review helpful)

     
    5.0

    ease of install of great product

    By 

    from W Va

    About Me Auto Enthusiast, Casual Driver, Competitive Driver

    See all my reviews

    Verified Buyer
    3 or more reviews submitted

    Pros

    • Durable
    • Easy To Use
    • Lightweight
    • Versatile

    Cons

      Best Uses

        Comments about Dorman - Help Transfer Case Switch:

        good product for the money

        • Was this a gift?:
        • No

        Comment on this reviewHelp Icon

        (4 of 9 customers found this review helpful)

         
        1.0

        Junky parts

        By 

        from Michigan where you need your 4x4 to work

        Pros

        • None

        Cons

        • Be ready to change a few

        Best Uses

        • Paper weight

        Comments about Dorman - Help Transfer Case Switch:

        worst part ever, Don't buy one of these unless you like to change a few of these. I bought one a Advance Auto and it let the vacuum leak by it. Bought another one at a different store and it did the same thing. so if you cant get your front axle to engage start looking at this switch before changing other parts, I didn't get this part to even work once, no wonder why it only has a 90 day warranty.

        Comment on this reviewHelp Icon

        (7 of 11 customers found this review helpful)

         
        3.0

        front axle trouble?

        By 

        from bport West Virginia ,go mountaineers!

        Pros

        • Easy To Use

        Cons

          Best Uses

          • Trucks

          Comments about Dorman - Help Transfer Case Switch:

          If your front axle wont engage this could be the problem. Ive went through 4 or 5 axle vacum acuators that go under the battery tray. The problem is this part often fails and leaks transfer oil into your vacum system. the oil was causing the diaphram on the acuator to rot in months or sometimes just weeks. The oil will also get into your heater vacum controls. i hope this saves someone else the winter time anger and frustration that I have had.

          Comment on this reviewHelp Icon

          (7 of 12 customers found this review helpful)

           
          3.0

          front axle trouble?

          By 

          from bport West Virginia ,go mountaineers!

          Pros

          • Easy To Use

          Cons

            Best Uses

            • Trucks

            Comments about Dorman - Help Transfer Case Switch:

            If your front axle wont engage this could be the problem. Ive went through 4 or 5 axle vacum acuators that go under the battery tray. The problem is this switch often fails and leaks transfer oil into your vacum system. The oil was causing the diaphram on the acuator to rot in months or sometimes just weeks. The oil will also get into your heater vacum controls. i hope this saves someone else the winter time anger and frustration that I have had.

            Comment on this reviewHelp Icon

            Displaying reviews 1-7

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            Do you have questions about this product?

             

            Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

            16 Questions | 17 Answers
            Displaying questions 1-10Previous | Next »
            • Q:

              I have a 2000 Chevy S-10 3 door Pick-up.
              When I PUSH the button for 4 wheel Hi or Low the light goes on but
              the 4 wheel does not engage. Would this be the first place to look for a fix?
              Thanks for your help
              Jack
              Asked on 9/25/2015 by Jack from Glade Hill VA

              1 answer

              • CUSTOMER CARE

                A:

                Hi Jack! The Transfer Case Switch may also cause this problem. However, I would suggest that you take your vehicle and get it thoroughly checked by a certified mechanic before buying any parts that may/may not solve the problem.

                Answered on 9/26/2015 by Solomon
            • Q:

              2000 olds smart track does not engage what to do?
              Asked on 2/18/2015 by bill

              1 answer

              • CUSTOMER CARE

                A:

                I could be of help, Bill! Check to see if the diaphragm under the battery is split of the vacuum line is off. It comes from the switch you installed.

                Answered on 2/19/2015 by Solomon
            • Q:

              i have oil comeing out of transfer case switch not alot but will not go into 4wd 1999 chevy s10 no vac. to front actuator
              Asked on 3/22/2013 by redbird from normalville

              1 answer

              • CUSTOMER CARE

                A:

                With reference to your inquiry on the Dorman - Help Transfer Case Switch - Part No. 49315 the transfer case switch has seals to keep the fluid inside the transfer case out of the vacuum lines. This seal is supposed to prevent the automatic transmission fluid (ATF) inside the transmission from making its way into the transfer case.These seals can fail over time. When that happens, ATF from the transmission will leak into the transfer case. Apart from a bad switch, a bad vent tube (or partial block) can also cause a transfer case leak. I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not (solve/be) the problem. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                Answered on 3/25/2013 by John the Car-Doc from AAP
            • Q:

              i have a 1998 blazer and when leaving work one day,put it in 4 wheel hi.driving down the road,i noticed both 2 hi and 4 hi lights were on at switches.(note:it did engage into 4 hi when i pushed it initially.)i pushed the 4 hi switch again and all lights went off.now its stuck in 2 hi with no indicator light,and wont go in to 4 hi or 4 low.is this the part i need?
              Asked on 1/18/2013 by rick from greeneville,tn

              1 answer

              • CUSTOMER CARE

                A:

                With reference to your inquiry on this Dorman - Help Transfer Case Switch - part# 49315, the transfer case switch may be the possible cause of the problem on your Chevy Blazer. However, I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not (solve/be) the problem. For any further assistance, you may also visit your nearest Advance Auto store or call us directly at 1-877-ADVANCE (238-2623) and one of our representatives there would be more than happy to assist you.

                Answered on 1/19/2013 by Vincent from AAP
            • Q:

              I have a 2000 Chev.Blazer it is lock end 4H will not go back end 2 wheel drive.
              Asked on 1/13/2013 by Fred from Louisa,ky

              1 answer

              • CUSTOMER CARE

                A:

                With reference to your inquiry on Dorman - Help Transfer Case Switch - Part No. 49315 the possible cause of locking up is due to older fluid in the transfer case. Please change the fluid in the transfer case and make sure to have correct fluid put in the case. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have.

                Answered on 1/13/2013 by John the Car-Doc from AAP
            • Q:

              will not come out of 4 wheel low
              Asked on 9/25/2012 by rob from eden ny

              1 answer

              • CUSTOMER CARE

                A:

                Sorry, without the presence of your vehicle we would not be able to properly diagnose it nor provide you with a 100% answer. We would suggest that you take your vehicle to a certified mechanic for further diagnosis. For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

                Answered on 9/25/2012 by Rick from AAP
            • Q:

              i have a 98 blazer 4wd ls i need to replace this part but when i get my hand up in there i only feel one hose with a spring clamp. And it feels loose like it plugs in and not screws in. From that one hose it goes to a connector where 2 hoses connect to. The hose is atleast 3/8.
              Asked on 1/18/2012 by Anonymous

              1 answer

              • CUSTOMER CARE

                A:

                This Dorman - Help Transfer Case Switch is an ideal connector for your 1998 Chevrolet S-10 Blazer. Also please note that this part is a 3-pin plug-in connector only and is not a screw type.

                Answered on 1/19/2012 by John the Car-Doc from AAP
            • Q:

              looking rubber connector that connects the vacuum lines to the vacuum switch on transfer case
              Asked on 1/1/2012 by Anonymous

              1 answer

              • CUSTOMER CARE

                A:

                If you could please provide the year, make, model and engine size of the vehicle and we would be better able to assist you.

                Answered on 1/3/2012 by Steve from AAP
            • Q:

              I HAVE A 2003 TRAILBLAZER WHAT I WOULD LIKE TO KNOW WHERE THIS PART IS LOCATED ON THE TRANSFER CASE.THIS IS A VACUUM SWITCH AND THERE ARE NO VACUUM LINES TO THE TRANS THAT I CAN SEE.
              Asked on 12/4/2011 by Anonymous

              1 answer

              • CUSTOMER CARE

                A:

                Trying to remove the transfer case control switch from the instrument panel (IP) trim panel without releasing the retainers will damage the IP trim panel. The switch cannot be removed without first removing the trim panel. Remove the two (2) screws that retain the rear edge of the driver's side insulator to the IP. Remove the two (2) screws that retain the bottom of the knee bolster to the IP. Remove the two (2) screws that retain the top of the knee bolster to the IP. Remove the four (4) screws that retain the IP bezel to the IP. Separate the bezel from the IP enough to allow access to the transfer case control switch. Disconnect the electrical connector and remove the switch. Install the new switch and connect the electrical connector. Reposition the IP bezel and install the four (4) retaining screws. Reposition the knee bolster and install the four (4) retaining screws. Reposition the insulator and install the two (2) retaining screws.

                Answered on 12/6/2011 by John the Car-Doc from AAP
            • Q:

              i have a 2001 chevy blazer 4x4, it will not engage in 4 wheel drive. it sounds like it is but when you hit th switch the light just keeps on blinking...any ideas what this could be...
              Asked on 11/7/2011 by Anonymous

              2 answers

              • CUSTOMER CARE

                A:

                Unfortunately we are unable to diagnose what is wrong with your vehicle without being able to be there with your vehicle. We highly recommend taking your vehicle to a reputable shop to have them take a look at it to determine the cause.

                Answered on 11/7/2011 by Steve from AAP
              • A:

                If the light is blinking that usualy means the transfer case control module is burnt out, I have had 3 of them burn up in my 94 Jimmy

                Answered on 12/4/2011 by Tom from Michigan
            Displaying questions 1-10Previous | Next »

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