S170r - retarder ready carrier, S170fobc - gentech™ quiet gearing & rolled over, S170d - diff lock carrier – Spicer Drive Axles Illustrated Parts List Dana Spicer Service Carrier List User Manual
Page 28: S170dr - diff lock w/retarder ready option carrier

27
New Service Carriers Single Drive Axles
Single Axle - Single Reduction Carriers
S170 - Standard Carrier and No Spin Carrier
18.00" Ring Gear Diameter
Side Gear # 300GD101
No Spin # 131882
These new carrier units directly replace single axle models S21-
170, S23-170, S26-170, S21-170NS, S23-170NS, S26-170NS and
tandem rear-rear models R40-170, R46-170, R40-170NS, R46-
170NS with no modifications. Model on ID tag may be R46-170 or
R46-170NS.
Side Gear
New
With
Ratio Spline
Carrier
No Spin
3.07 46 Inv
681183
3.21 46 Inv
681184
3.42 46 Inv
681186
3.58 46 Inv
681187
3.73 46 Inv
681188
3.91* 46 Inv
681189
4.10* 46 Inv
681190
4.30* 46 Inv
681191
681408
4.56 46 Inv
681192
681409
4.78 46 Inv
681193
681410
5.25 46 Inv
681194
681411
5.38 46 Inv
681252
681412
5.57 46 Inv
681253
681382
6.14 46 Inv
681254
681413
6.83 46 Inv
681255
681414
7.17 46 Inv
681256
*Most commonly used ratios in On-Hwy vehicle applications.
S170R - Retarder Ready Carrier
18.00" Ring Gear Diameter
Side Gear # 300GD101
These new carrier units directly replace single axle models S23-
170R, S26-170R and S30-170R with no modifications.
Side Gear
New
Ratio Spline
Carrier
Notes
5.25 46 Inv
681350
S170FOBC - GenTech™ Quiet Gearing & Rolled
Over
18.00" Ring Gear Diameter
Side Gear # 300GD101
These new carrier units directly replace single axle models S21-
170FOBC, S23-170FOBC, S25-170FOBC with no modifications.
Side Gear
New
Ratio Spline
Carrier
Notes
4.30 46 Inv
681394
S170D - Diff Lock Carrier
18.00" Ring Gear Diameter
Side Gear # 300GD101
Note: Drive Axle Tag may read R46-170D
These new carrier units directly replace single axle models S21-
170D, S23-170D, S25-170D and tandem rear-rear models R40-
170D, R46-170D, R50-170D with no modifications.
Side Gear
New
Ratio Spline
Carrier
Notes
3.07 46 Inv
681198
3.21 46 Inv
681199
3.42 46 Inv
681201
3.58 46 Inv
681202
3.73 46 Inv
681203
3.91* 46 Inv
681204
4.10* 46 Inv
681205
4.30* 46 Inv
681206
4.56 46 Inv
681207
4.78 46 Inv
681208
5.25 46 Inv
681209
5.38 46 Inv
681257
5.57 46 Inv
681258
6.14 46 Inv
681259
6.83 46 Inv
681260
7.17 46 Inv
681261
*Most commonly used ratios in On-Hwy vehicle applications.
S170DR - Diff Lock w/Retarder Ready Option
Carrier
18.00" Ring Gear Diameter
Side Gear # 300GD101
These new carrier units directly replace single axle models S23-
170DR, S26-170DR and S30-170DR with no modifications.
Side Gear
New
Ratio Spline
Carrier
Notes
5.25 46 Inv
681350