ATF leakage between engine and transmission

• Possible damage:

The ATF pump corroded resulting in increased wear and chafing on the torque converter hub, heavy ATF leakage.

• Required actions:

Fig 1: Checking For ATF Escaping At Oil Leak Inspection Opening

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• Make sure that no ATF escapes at oil leak inspection opening - arrow  - after removing transmission. In this case, the final drive/transmission housing double shaft seal would be faulty.
• Replace final drive/transmission housing double shaft seal if necessary → 39 - FINAL DRIVE, DIFFERENTIAL .

Fig 2: Identifying Brass Sleeve

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• Check brass sleeve - arrow  - for signs of wear and seizing.

Fig 3: Inspect Torque Converter Hub For Irregular Grooves

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• Check hub - arrow  - of torque converter for wear and corrosion.

If corrosion is detected:

• Replace ATF pump and torque converter.
• If there is heavy soiling → Evaluating wear by evaluating ATF color and impurities  , disassemble and clean transmission.
• Replace valve body → Valve body, removing and installing .

Fig 4: Torque Converter Centering Bushing

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• Check whether alignment sleeve - arrow  - for torque converter is installed in crankshaft →
  • 13 - ENGINE - CRANKSHAFT, CYLINDER BLOCK for 1.8 LITER 4-CYL. 5V TURBO ENGINE MECHANICAL, ENGINE CODE(S): AMB
  • 13 - ENGINE - CRANKSHAFT, CYLINDER BLOCK for 2.0 LITER 4-CYL. 4V TURBO ENGINE MECHANICAL, ENGINE CODE(S): BPG, BWT
  • 13 ENGINE - CRANKSHAFT, CYLINDER BLOCK for 3.0 LITER 6-CYL. 5V ENGINE MECHANICAL, ENGINE CODE(S): AVK, BGN
  • 13 - ENGINE - CRANKSHAFT, CYLINDER BLOCK for 3.2 V6 4V ENGINE MECHANICAL, ENGINE CODE(S): BKH
  • 13 - ENGINE - CRANKSHAFT, CYLINDER BLOCK for 4.2 LITER V8 4V ENGINE MECHANICAL, ENGINE CODE(S): BNS
  • 13 - ENGINE - CRANKSHAFT, CYLINDER BLOCK for 4.2 LITER V8 5V ENGINE MECHANICAL, ENGINE CODE(S): BHF
  .

Fig 5: Location of Alignment Sleeves

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• Check whether both alignment sleeves - A  - are inserted in cylinder block.
• Check alignment sleeves for deformation and holes in transmission flange for damage.