Rear gear question

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Pretty sure the pinion shaft diameter is what is different.... Ring and pinion set only fit one case and are not interchangale.
 
Robb said:
Pretty sure the pinion shaft diameter is what is different.... Ring and pinion set only fit one case and are not interchangale.
Click to expand...

Correct the pinion shaft diameter is different between each, the 741, 742, and 489. So to answer your question, no.
 
Robb said:
Pretty sure the pinion shaft diameter is what is different.... Ring and pinion set only fit one case and are not interchangale.
Click to expand...

Found the answer on drivetrain.com actually... Here is the basic info

Early 741 Housing

  • 8-11/16"
  • 10 HOLES
  • Round Gasket Pattern
  • RG DIAMETER 8.75"
  • 12 3/18" X 24 LH THREADED BOLTS
  • PINION DIAMETER 1.375" 29 SPLINE 741 Style Casting - Straight Pinion
  • CASE: no case breaks
  • 8620 Material Heat-Treated
    Assembly Specifications:
  • Housing Bolt Ft. Lbs. 35-40
  • Pinion Brg. Preload In. Lbs 25-30
  • Pinion Brg. Preload In. Lbs Used 15-25
  • Ring Gear Backlash .006-.012
  • Ring Gear Bolt to case Ft. Lbs. 55-60
  • Side Brg. Caps Ft. Lbs. 65
Early 742 Housing

  • 8-11/16" x 10 19/32"
  • 10 HOLES
  • Round Gasket Pattern
  • RG DIAMETER 8.75"
  • 12 3/18" X 24 LH THREADED BOLTS
  • PINION DIAMETER 1.75" 10 SPLINE 742 Style Casting - Straight Pinion
  • CASE: no case breaks
  • 8620 Material Heat-Treated
    Assembly Specifications:
  • Housing Bolt Ft. Lbs. 35-40
  • Pinion Brg. Preload In. Lbs 25-30
  • Pinion Brg. Preload In. Lbs Used 15-25
  • Ring Gear Backlash .006-.012
  • Ring Gear Bolt to case Ft. Lbs. 55-60
  • Side Brg. Caps Ft. Lbs. 65
489 Housing

  • 8-11/16" x 10 19/32"
  • 10 HOLES
  • Round Gasket Pattern
  • RG DIAMETER 8.75"
  • 12 3/18" X 24 LH THREADED BOLTS
  • PINION DIAMETER 1.875" 29 SPLINE 489 Style Casting - Straight Pinion
  • CASE: no case breaks
  • 8620 Material Heat-Treated
    Assembly Specifications:
  • Housing Bolt Ft. Lbs. 35-40
  • Pinion Brg. Preload In. Lbs 25-30
  • Pinion Brg. Preload In. Lbs Used 15-25
  • Ring Gear Backlash .006-.012
  • Ring Gear Bolt to case Ft. Lbs. 55-60
  • Side Brg. Caps Ft. Lbs. 65
Can a SureGrip carrier move from a 742 to a 741 housing?
 
.............SG will interchange between all 8.75s......if theres a will theres a way.......i've seen 742s in a 489 case.......also the sleeve on the small pinion is supposed to let the 741 interchange with the 742 and vice versa but i've never tried....kim...........
 
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