MA6 ✓ Factory-verified

Chevrolet · Regular Production Option

Transmission, Allison A1700PTS, 6 speed automatic, close-ratio, double overdrive, non-conforming school bus or shuttle bus

Years 1969, 2025–26 Models 3 Factory citations 3

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Also described as HD dual-disc clutchHeavy Duty Clutch

Documented applications

Camaro →

• 1969 ✓ Factory-verified

  added Feb 69; zero production

  ⛭ GM Heritage factory kit — 1969 Chevrolet Camaro, p.45.

Corvette (C3) →

• 1969 ● Confirmed

  $79.00; 102 built

Silverado Medium Duty (GM515, 2019–2026) →

• 2025–2026 ✓ Factory-verified

  gear ratios 3.10, 1.80, 1.40, 1.00, 0.70 and 0.61; 26,001 lb GCW maximum; requires PTX and a park pawl; for GVW at or below 19.5K

  ⛭ GM factory document — 2025 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

Related codes · mentioned in these notes

102PTX

This page aggregates every documented appearance of MA6 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.