LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1982 >> Magnavan Standard Trans >> Labor Times >> Other Variant >> Transmission >> Automatic Trans >> Transmission Seal Kit >> Remove & Replace
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Transmission Seal Kit: Remove & Replace

WARNING: This page is about the Magnavan Automatic Trans, Trans Mfr CD 400/M40, which is a different variant/trim than selected.

TRANS ID - 250, 250C, 350, 350C

Includes: R&I Transmission, replace Front Pump Gasket and/or Seal, Oil Pan Gasket and/or Seal, and Extension Housing or Transfer Case Adapter Gasket and/or Seal.

Applies ToNoteStandard HoursWarranty HoursSkill Level
G3500,RWD4.9B

TRANS ID - 400, 475, 3L80, 3L80HD

Includes: R&I Transmission, replace Front Pump Gasket and/or Seal, Oil Pan Gasket and/or Seal, and Extension Housing or Transfer Case Adapter Gasket and/or Seal.

Applies ToNoteStandard HoursWarranty HoursSkill Level
4.2B

TRANS ID - 700-R4, 4L60, 4L60E, 4L65E, 4L70E

Includes: R&I Transmission, replace Front Pump Gasket and/or Seal, Oil Pan Gasket and/or Seal, and Extension Housing or Transfer Case Adapter Gasket and/or Seal.

Applies ToNoteStandard HoursWarranty HoursSkill Level
G3500,RWD4.4B