RenegadeMonster wrote:So, are the Franken-Geeps unique to the MBTA, or do more exist out there?Yes, they are unique because they were rebuilt with all-custom microprocessor controls. That's where the "MC" designation comes from. Nobody else attempted that with passenger or freight Geeps. Microprocessor controls are common in locos today; even the ongoing F40PH-3/3C rebuilds now sport them. But they were newish technology in the mid-90's done with circuit boards and not the reprogrammable firmware you have today...and were totally unproven at the time in retrofits of old power. The GP40MC's controllers were a botched application that never worked correctly, and are a pain-in-the-butt to this day for their perpetually quirky behavior. Replacing a failed implementation in another rebuild is going to be hard (on top of the unfavorable rebuild costs from the component ages on everything '73-vintage), and because they had a failed implementation never tried elsewhere the process of "un-MC'ing" then correctly re-implementing new controls ends up a fruitless waste of resources. The MC's weren't the only such failure. NJ Transit's third and final order of ALP-44 electrics in '96 (12 units of ALP-44M's) also swung and missed on the newfangled microprocessor control implementation and ended up being hated shop queens while the earlier non-digital ALP's in the fleet were ho-hum reliable. So the MC's were both a product of the inherent risks of the technology of that era...and a stupid overreach by the T and AMF to go even further out on a limb trying it on very old instead of new power, and eschewing rebuild best-practices to do it on power that never needed high-tech mods for any reason other than self-justifying "because reasons".
There aren't many GP40's left in passenger service, period, but none of them are anything like the 20 in-service/5 stored GP40MC's. NJT has 27 GP40PH-2's/2A's/2B's left off what was once a roster more than twice as large, MNRR (West-of-Hudson) has 7 GP40FH-2M's and GP40PH-2M's, MARC has 6 GP39H-2's (downrated GP40's) and 1 remaining GP40WH-2 of the same kind the T leased several years ago, and CDOT has 6 GP40-2H's for Shore Line East/Hartford Line. All of them are as analog and vanilla as can be. CDOT's relatively light-mileage 6 units are out for rebuild right now (to same vanilla spec with no upgrades), MNRR's were rebuilt in '07 and won't hit end-of-rated-life on this rebuild cycle for another 8-10 years...but all others are wheezing towards retirement years past their last rebuild's expiration date with no further overhauls planned. NJT has slashed its roster way, way down to the barest minimum "best of the rest" it can get by with and limits further wear-and-tear on them by banning them from pulling bi-level coaches. So unlike the F40PH-2's which are still the #1 North American passenger make in-service and still being rebuilt en masse such that they'll remain a Top 3 make into the 2030's...the sun is setting quickly on passenger Geeps. 5 or 6 years from now it may well just be those 6 CDOT and 7 MNRR units of fresher vintage still hauling commuter trains because everything else is end-of-life and too thoroughly worn out to have another encore left in them.