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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Automatic Transaxle - 4T80-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - Off Vehicle >> Secondary Pump Assemble

Secondary Pump Assemble

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use J 36850 or equivalent during assembly in order to retain checkballs or to lubricate components. Lubricants other than the recommended assembly lube changes the transmission fluid characteristics and causes undesirable shift conditions or filter clogging.
    Fig 1: Pressure Regulator Valve Bore Inspection Areas
    GM12023Courtesy of GENERAL MOTORS CORP.
  1. Inspect the pressure regulator valve bore for nicks or scoring.
  2. Install the following parts:
    • The pressure regulator valve (211)
    • The pressure regulator spring retainer (210)
    • The pressure regulator valve spring (212)
    • The pressure regulator boost valve (213)
    • The pressure regulator boost valve sleeve (214)
    • The retainer clip (215)
    3. Fig 2: Inspection Areas On Scavenge Pump
    GM12022Courtesy of GENERAL MOTORS CORP.
  3. Inspect the following for damage or nicks:
    • The scavenge pump bushing (204)
    • The secondary pump cover (203)
    • The pump ball seat (217)
  4. Install the following parts:
    • The secondary pump cutoff ball (216)
    • The pump ball seat (217)
    • The retainer clip (215)
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