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GMC Yukon XL 2000–2006

GMC Yukon XLModel years 2000–2006

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Common on this vehicle:Gauge or instrument faultWarning lightCorrosion or rustNoiseLeakReduced brakingStalls or shuts offLoss of engine power, no acceleration

Possible causes

146 causes not drawn

The documents say what to doOnly records name itThe size of a node, the width of a link and the numbers are records matching this search, not likelihoods.

Candidate cause (the documents say what to do)

4L60-E burnt 3-4 clutch pack

Low line pressure and/or leaks of 3rd gear oil are the root cause of most 3-4 slipping.

Small leaks at several points in the circuit can add up to enough pressure loss to allow slipping.

What to do

  1. Test the 3rd accumulator checkball capsule for leakage; a leaking capsule is a leading cause of 3-4 clutch failure.
  2. Whenever a burnt clutch pack is found, inspect all three circuits methodically to find and eliminate all leaks.
  3. Thicker heavy-duty backing plates that eliminate clutch pack flex are available in the aftermarket.

Caution: An obvious leak such as a cracked apply piston should not stop further investigation.

In the records

No record states work done for this cause.

See the evidence (1 technical documents, 1 records)

Passages of the technical documents

  • Burnt 3-4 clutch packs are notoriously common in the GM 4L60/E family of transmissions.

    Sonnax 2018-06-06

  • Low line pressure and/or leaks of 3rd Gear oil are the root cause of most 3-4 slipping.

    Sonnax 2018-06-06

  • even small leaks at a few junctions along the way can add up to a big enough pressure loss to allow slipping.

    Sonnax 2018-06-06

  • The weak OE 3-4 backing plate flexes during application, allowing heat to build up unevenly within the clutch pack’s limited space.

    Sonnax 2018-06-06

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Records

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A cause or a result a complaint states is the owner’s view or what a dealer told them, not an established fact.