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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 795 (8HP45/845RE Automatic Transmission (Service Information) - 1500) >> Pump, Transmission Oil >> Removal >> Transmission Oil Pump

Transmission Oil Pump

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Oil Pump Assembly To Case Bolts
GC0154667Courtesy of CHRYSLER GROUP, LLC
  1. Remove the transmission. Refer to REMOVAL .
  2. Remove the valve body. Refer to VALVE BODY, REMOVAL .
  3. Remove the 13 oil pump assembly to case bolts (1).
    Fig 2: Input Shaft O-Ring & Small Pick
    GC0152105Courtesy of CHRYSLER GROUP, LLC
  4. Remove the input shaft O-ring (1) using a small pick (2) or equivalent and discard.
    Fig 3: Prying Oil Pump Housing Away From Case
    GC0154661Courtesy of CHRYSLER GROUP, LLC
  5. Carefully pry the oil pump housing (1) away from the case (2) with a small flat blade screwdriver or equivalent through the case opening.
  6. From the front of the transmission, remove the oil pump housing.
    Fig 4: B-Piston, Hole & B-Piston Alignment Tab
    GC0152249Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Apply air pressure slowly, oil may spray when B-piston releases from the assembly.

  7. With one hand above B-piston (1), carefully apply air pressure into the hole directly above the B-piston alignment tab (3) to remove B-piston (2) from the assembly.
    Fig 5: Outer Ring, Snap Ring, Hub & Spacers
    GC0152250Courtesy of CHRYSLER GROUP, LLC
  8. Remove the outer ring (1) (inside B-piston).
  9. Remove the snap ring (2).
  10. Remove the clutches and spacers (4).
  11. Remove the hub (3).
    Fig 6: Oil Pump Housing Assembly
    GC0152251Courtesy of CHRYSLER GROUP, LLC
  12. Position the oil pump housing assembly (4) in a suitable press.
  13. Using (special tool #8285, Compressor, Spring) (1), press on the fingers of the piston retainer to remove tension on the split retaining ring (2), and remove the two halves of the retaining ring (2).
    Fig 7: Piston Retaining Ring
    GC0152254Courtesy of CHRYSLER GROUP, LLC
  14. Remove the piston retainer and plate.
    Fig 8: Six Bolts, Oil Pump Housing & Oil Pump Cover
    GC0152253Courtesy of CHRYSLER GROUP, LLC
  15. Remove the six bolts (1) and separate the oil pump housing (2) from the front oil pump cover (3).
    Fig 9: Front Cover & Oil Pump Housing
    GC0152272Courtesy of CHRYSLER GROUP, LLC
  16. Separate the front cover (1) from the oil pump housing (2).
    Fig 10: Drive Sprocket, Chain And Pump Body
    GC0152260Courtesy of CHRYSLER GROUP, LLC
  17. Remove the drive sprocket, chain and pump body (1) as an assembly.
  18. Remove and discard all O-rings.
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