MN4 ✓ Factory-verified

Buick · Regular Production Option

Transmission, automatic, 4 speed, 4T40-E

Years 1998 Models 1 Factory citations 1

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Also documented for ChevroletOldsmobilePontiacSaturn

Documented applications

Skylark — N-body (1992–1998) →

• 1998 ✓ Factory-verified

  Wikipedia names the 4T60-E as the Skylark's 4 speed automatic; this list prints 4T40E.

  ⛭ GM factory document — 1998 buick skylark rpo code list, p.1.

This page aggregates every documented appearance of MN4 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.