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3L80 Extension Housing 34770BA (9 5/8” Long)

Catalog name:
Extension Housing, 375 (9 5/8” Long)(Uses 350 Rear Seal) (7 3/16” From Rear Seal To Mount) 1972-76
Extension Housing, 375 (9 5/8” Long)(Uses 350 Rear Seal) (7 3/16” From Rear Seal To Mount) 1972-76 — Part # 34770BA
Part # 34770BA
Type:
Housing, seal
Transmissions:
3L80, 4L80E, 4L85E
Years:
1972-76
Size:
9 5/8” Long; 7 3/16” From Rear Seal To Mount
Data as of:
2026-10-17

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Cross-reference numbers

NumberSystemStatus
34770BAWIT✓ catalog

Where it fits

DiagramPositionTransmission page
3L807703L80
4L80E7704L80E
Other parts in 3L80 position 770:
  • 34770 Extension Housing, 400 (13 5/8” Long) Cadillac 1968-70
  • 34770A Extension Housing, 400 (9 5/8” Long)(Uses Large Rear Seal)(Uses 400 Rear Seal)
  • 34770B Extension Housing, 375 (9 5/8” Long)(Uses 350 Rear Seal) 1972-76
  • 34770C Extension Housing, 400 Truck (4” Long)(Uses a Bolt-On Yoke)(Uses Large Rear Seal)
  • 34770D Extension Housing, 400 Truck (4” Long)(Uses Medium Rear Seal)
  • 34770E Extension Housing, 4L80E (7 1/4” Long)(Truck, For Bolt-On Yoke)
  • 34770EA Extension Housing, 4L80E (6 5/8” Long)(Truck)(For Bolt On Yoke)(For Bolt On Parking Brake)
  • 34770EB Extension Housing, 4L80E (5 3/4” Long)
  • 34770EC Extension Housing, 4L80E (7 1/4” Long)(Truck, For Bolt-On Yoke)(For Bolt-On Parking Brake)
  • 34770ED Extension Housing, 4L80E (5 3/8” Long)(Truck, For Bolt-On Yoke)(For Bolt On Parking Brake)
  • and 6 more
Other parts in 4L80E position 770:
  • 34770 Extension Housing, 400 (13 5/8” Long) Cadillac 1968-70
  • 34770A Extension Housing, 400 (9 5/8” Long)(Uses Large Rear Seal)(Uses 400 Rear Seal)
  • 34770B Extension Housing, 375 (9 5/8” Long)(Uses 350 Rear Seal) 1972-76
  • 34770C Extension Housing, 400 Truck (4” Long)(Uses a Bolt-On Yoke)(Uses Large Rear Seal)
  • 34770D Extension Housing, 400 Truck (4” Long)(Uses Medium Rear Seal)
  • 34770E Extension Housing, 4L80E (7 1/4” Long)(Truck, For Bolt-On Yoke)
  • 34770EA Extension Housing, 4L80E (6 5/8” Long)(Truck)(For Bolt On Yoke)(For Bolt On Parking Brake)
  • 34770EB Extension Housing, 4L80E (5 3/4” Long)
  • 34770EC Extension Housing, 4L80E (7 1/4” Long)(Truck, For Bolt-On Yoke)(For Bolt-On Parking Brake)
  • 34770ED Extension Housing, 4L80E (5 3/8” Long)(Truck, For Bolt-On Yoke)(For Bolt On Parking Brake)
  • and 6 more
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