Ford model 61 rear axles 61 rear axles, Bill of material table – Spicer Front and Rear Axle Catalog User Manual
Page 105

X510-9
(7)
See Ring Gear & Pinion Kits in XGI Catalog for ratio & tooth combinations.
(8)
See Differential Case Assy Kits in XGI Catalog for spline data & ratios.
Axle
Axle Kits
Shaft & Joint Assy.
Differential
Bill of
Material
Diff.
Type
Ratio
Ring Gear &
Pinion Kit
(7)
Case Assy.
Kit
(8)
Case Kit
Inner Parts
Kit
Right Hand
Shaft Assy.
Left Hand
Shaft Assy.
99
Bill of Material Table
Ford Model 61 Rear Axles
61 Rear Axles
1974-75 F-250 3/4 Ton HD 4x2 Pick-up - Full-Float
603429-1
Standard
3.07
706661-2X
706664X
706668X
706671X
35467-3
35467-3
603429-2
Trac-Lok
3.07
706660-2X
706662X
706666X
706670X
35467-3
35467-3
603429-3
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
603429-4
Trac-Lok
3.31
706660-1X
706662X
706666X
706670X
35467-3
35467-3
603429-5
Standard
3.54
706661-1X
706399X
706668X
706671X
35467-3
35467-3
603429-7
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
1975 F-250 4x2 - Full-Float
603539-1
Standard
3.07
706661-2X
706664X
706668X
706671X
35467-3
35467-3
603539-6
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
1976-78 F-250 3/4 Ton HD 4x2 Pick-up - Full-Float
603714-1
Standard
3.07
706661-2X
706664X
706668X
706671X
35467-3
35467-3
603714-3
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
603714-6
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
1978 1/2 F-250 3/4 Ton HD 4x2 Pick-up - Full-Float
603899-1
Standard
3.07
706661-2X
706664X
706668X
706671X
35467-3
35467-3
603899-2
Standard
3.31
706661-1X
706399X
706668X
706671X
35467-3
35467-3
603899-3
Standard
3.31
706661-1X
706399X
706668X
706671X
35467-3
35467-3
1974-75 F-250 3/4 Ton HD 4x2 Other Than Pick-up - Full-Float
603438-1
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
603438-2
Trac-Lok
3.31
706661-1X
706662X
706666X
706670X
35467-3
35467-3
603438-3
Standard
3.54
706660-1X
706676X
706677X
706671X
35467-3
35467-3
603438-6
Standard
3.07
706661-2X
706664X
706668X
706671X
35467-3
35467-3
603438-5
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
1976 F-250 3/4 Ton HD 4x2 Other Than Pick-up - Full-Float
603540-1
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
603540-4
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
603540-5
Standard
3.07
706661-2X
706036X
706668X
706671X
35467-3
35467-3
1977 F-250 3/4 Ton HD 4x2 Other Than Pick-up - Full-Float
603713-4
Standard
3.31
706661-1X
706664X
706668X
706671X
35467-3
35467-3
603713-5
Standard
3.07
706661-2X
706036X
706668X
706671X
35467-3
35467-3
1975 1/2-78 E-250 3/4 Ton Van - Full-Float
603594-1
Standard
3.31
706661-5X
706664X
706668X
706671X
37560-3
37560-4
603594-2
Standard
3.31
706661-5X
706664X
706668X
706671X
37560-3
37560-4
603594-3
Standard
3.31
706661-5X
706664X
706668X
706671X
37560-3
37560-4
603594-4
Trac-Lok
3.31
706661-1X
706662X
706666X
706670X
37560-3
37560-4
603594-9
Standard
3.73
706660-2X
706676X
706677X
706671X
37560-3
37560-4
603594-11
Standard
3.73
706660-2X
706676X
706677X
706671X
37560-3
37560-4
603594-12
Trac-Lok
3.73
706661-3X
706663X
706667X
706670X
37560-3
37560-4
603594-15
Standard
4.10
706660-3X
706676X
706677X
706671X
37560-3
37560-4
603594-16
Trac-Lok
4.10
706661-9X
706663X
706667X
706670X
37560-3
37560-4
603594-17
Standard
3.73
706660-2X
706676X
706677X
706671X
37560-3
37560-4
603594-18
Standard
4.10
706660-3X
706676X
706677X
706671X
37560-3
37560-4
603594-19
Standard
3.07
706661-4X
706664X
706668X
706671X
37560-3
37560-4
603594-21
Trac-Lok
3.73
706661-3X
706663X
706667X
706670X
37560-3
37560-4
603594-22
Standard
3.31
706661-5X
706664X
706668X
706671X
37560-3
37560-4