SSW 4134-4153
All twenty of the Cotton Belt GP20's were run through the GRIP program.
SSW 4134-4153:
| GRIP number | prev. number | orig. number |
| SSW 4134 | SSW 4044 | SSW 814 |
| SSW 4135 | SSW 4046 | SSW 816 |
| SSW 4136 | SSW 4049 | SSW 819 |
| SSW 4137 | SSW 4037 | SSW 807 |
| SSW 4138 | SSW 4033 | SSW 803 |
| SSW 4139 | SSW 4039 | SSW 809 |
| SSW 4140 | SSW 4031 | SSW 801 |
| SSW 4141 | SSW 4032 | SSW 802 |
| SSW 4142 | SSW 4048 | SSW 818 |
| SSW 4143 | SSW 4034 | SSW 804 |
| SSW 4144 | SSW 4030 | SSW 800 |
| SSW 4145 | SSW 4047 | SSW 817 |
| SSW 4146 | SSW 4036 | SSW 806 |
| SSW 4147 | SSW 4043 | SSW 813 |
| SSW 4148 | SSW 4038 | SSW 808 |
| SSW 4149 | SSW 4040 | SSW 810 |
| SSW 4150 | SSW 4035 | SSW 805 |
| SSW 4151 | SSW 4041 | SSW 811 |
| SSW 4152 | SSW 4042 | SSW 812 |
| SSW 4153 | SSW 4045 | SSW 815 |