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3L80 Output Shaft 34678K (6 7/8” Long)

Catalog name:
Output Shaft, 400 4x4 (6 7/8” Long)(W/700R4 Splines)
Output Shaft, 400 4x4 (6 7/8” Long)(W/700R4 Splines) — Part # 34678K
Part # 34678K
Type:
Shaft
Transmissions:
3L80, 4L80E, 4L85E
Size:
6 7/8” Long
Data as of:
2026-10-17

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Cross-reference numbers

NumberSystemStatus
34678KWIT✓ catalog

Where it fits

DiagramPositionTransmission page
3L806783L80
4L80E6784L80E
Other parts in 3L80 position 678:
  • 34678 Output Shaft, 400 (Cadillac, Long) 1964-Up
  • 34678A Output Shaft, 375 (15” Long)(Uses a Speed-O Gear) 1964-Up
  • 34678AA Output Shaft, 375 (15” Long)(Uses a Electric Pick-Up)
  • 34678B Output Shaft, 400 (15” Long) 1964-Up
  • 34678C Output Shaft, 400 (11 3/4” Long)(W/350 Splines)
  • 34678D Output Shaft, 400 2wd & Some 4x4 (9” Long, W/Rubber O-Ring Groove)
  • 34678E Output Shaft, 400 2wd (9” Long, W/Out Rubber O-Ring Groove)
  • 34678EA Output Shaft, 400 Truck (9” Long, Bolt-On Type Yoke)(Uses Plastic Speed-O Gear)
  • 34678EB Output Shaft, 400 Truck (9” Long, Bolt-On Type Yoke)(Uses Steel Speed-O Gear)
  • 34678EC Output Shaft, 400 Truck (9” Long, Bolt-On Type Yoke)(W/Electronic Pick-up)
  • and 19 more
Other parts in 4L80E position 678:
  • 34678 Output Shaft, 400 (Cadillac, Long) 1964-Up
  • 34678A Output Shaft, 375 (15” Long)(Uses a Speed-O Gear) 1964-Up
  • 34678AA Output Shaft, 375 (15” Long)(Uses a Electric Pick-Up)
  • 34678B Output Shaft, 400 (15” Long) 1964-Up
  • 34678C Output Shaft, 400 (11 3/4” Long)(W/350 Splines)
  • 34678D Output Shaft, 400 2wd & Some 4x4 (9” Long, W/Rubber O-Ring Groove)
  • 34678E Output Shaft, 400 2wd (9” Long, W/Out Rubber O-Ring Groove)
  • 34678EA Output Shaft, 400 Truck (9” Long, Bolt-On Type Yoke)(Uses Plastic Speed-O Gear)
  • 34678EB Output Shaft, 400 Truck (9” Long, Bolt-On Type Yoke)(Uses Steel Speed-O Gear)
  • 34678EC Output Shaft, 400 Truck (9” Long, Bolt-On Type Yoke)(W/Electronic Pick-up)
  • and 19 more
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