Option reference

D21 Heavy-duty four-speed manual transmission

chassis · optional

Drivetrain source card for 440 Six Pack output, transmission paths, and 440 rear-gear evidence. 1971 Dodge Challenger R/T 440 Six Pack

Reference Details

Availability: optional
Category: chassis
Code: D21
Confidence: documented
Notes: Four-speed path for 426 and 440 V8 engines uses the heavy-duty ratio set in the reviewed powertrain table.

1 linked car page.

1971 Dodge

440 Six Pack V8 with three Holley two-barrel carburetors