GP40PH-2B No. 4217 heads west out of
Maplewood In 1991–92,
NJ Transit sent its ex-CNJ GP40PH units out for rebuilding. The units were rebuilt as GP40PH-2 locomotives. New Jersey Transit later ordered two more sets of GP40PH-2 units; these units were rebuilt from former freight GP40 units. The first order in 1993 consisted of six units rebuilt by
Morrison-Knudsen which are designated GP40PH-2A. The second order in 1993–94 was for 19 former
Penn Central units rebuilt by
Conrail, which are classified as GP40PH-2B.
Metro-North ordered a single GP40PH-2 unit, numbered 4906. It was rebuilt by Conrail in 1992 and is classified as a GP40PH-2M. Starting in 2014, all but three of NJ Transit's original GP40PH-2s have entered an in-house rebuild program by NJ Transit for a mechanical conversion into a standard GP40-2 for non-revenue service. The HEP motor was removed, unlit number boards were drilled in, the rear ladders were removed and replaced with steps, and LED markers were applied to the rear end of the locomotive, replacing their original tri-color class lights. As of 2020, locomotives 4100, 4101 and 4109 are the only ex-CNJ locomotives that remain in service. NJ Transit's GP40PH-2B units and Metro-North's GP40PH-2M unit also remain active. All GP40PH-2A units were retired and placed into storage, except for one unit, which was sold to MARC in 2019. The remaining GP40PH-2A units were scrapped in March 2026. In December 2017, New Jersey Transit purchased 17 additional ALP-45DPs to replace the remaining GP40PH-2B locomotives that are still in service. However, in July 2020, NJ Transit decided to use the ALP-45As to replace older locomotives of the
PL42AC fleet instead of the GP40PH-2Bs, due to the PL42AC's unreliability and inability to be upgraded to meet new
Environmental Protection Agency standards. In 2019, NJ Transit unveiled locomotive 4109 painted in a heritage scheme based on that of the CNJ GP40P. In October 2022, NJ Transit unveiled locomotive 4101 painted in a heritage NJDOT scheme. In October 2023, GP40PH-2B 4210 was repainted into the
Erie Railroad black-and-yellow scheme. In October 2024, locomotive 4208 was unveiled in Conrail's "can opener" scheme. In October 2025, locomotive 4202 was unveiled sporting the
Pennsylvania-Reading Seashore Lines "Dark Green Locomotive Enamel" scheme. == GP39H-2 ==