GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 41239-1A Cooler Line Seal Installer


    Object Number: 55139  Size: SH

    Notice: Failure to lubricate the cooler line seals with automatic transmission fluid DEXRON ® Vl before installing into the case or before installing the cooler line pipes into the seals may cause damage to the seal.

  1. Lubricate the inside surface of both cooler line seals (49) with automatic transmission fluid DEXRON ® V1.
  2. Place a new cooler line seal  (49) in the case bore.
  3. Install the J 41239-1A on the transmission case (51) at the cooler line bracket bolt hole.
  4. Press the new cooler line seal (49) in by tightening the seal pressing bolt on the J 41239-1A until the seal bottoms out in the case bore.
  5. Repeat steps 2-4 for the second cooler line seal (49).

Special Tools

J 41239-1A Cooler Line Seal Installer

For equivalent regional tools, refer to Special Tools.


    Object Number: 55139  Size: SH

    Caution: Failure to lubricate the cooler line seals with automatic transmission fluid DEXRON ® Vl before installing into the case or before installing the cooler line pipes into the seals may cause damage to the seal.

  1. Lubricate the inside surface of both cooler line seals (49) with automatic transmission fluid DEXRON ® V1.
  2. Place a new cooler line seal  (49) in the case bore.
  3. Install the J 41239-1A seal installer on the transmission case (51) at the cooler line bracket bolt hole.
  4. Press the new cooler line seal (49) in by tightening the seal pressing bolt on the J 41239-1A seal installer until the seal bottoms out in the case bore.
  5. Repeat steps 2-4 for the second cooler line seal (49).