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Ok, so I got rid of my 24V with headaches, and apparently picked up a 12V with someone else's headaches.. So, out of the frying pan, into the fire.I've been working out some kinks on this '97. I test drove it last friday, and from what I recall, it seemed to be fine.. Unless I didn't notice it (my fault for lack of due-diligence.)At any rate, the issue (for this thread) is the transmission.Story goes: 2 owners ago, dude bought a Jasper trans, installed it, killed it, warrantied it, killed that one, warrantied it, killed it, then Jasper said "this is your last one."so he pulled the 5spd from this '97, installed the Jasper auto in it, and stuck the 5 speed into the truck that he was using to kill transmissions.However, he did a ____-poor job, and sold it to last owner, who killed the poorly/improperly incomplete install in short order. So he took it to a diesel trans guy in MD, who rebuilt the Jasper trans using triple disc TC, red clutches, kevlar bands, HD valve body, etc. (parts from HTS Diesel).Installed a PCM (to replace a non-existant one) and rewired everything, so to speak, or so the story goes.Fast forward to me.. ( I don't need any "I told you so" type stuff, because I know. Believe me, I know.. One word: Wife. )I drove it home last friday, and all seemed well, although I did notice it seemed to rev a little higher to get it moving.. Granted, I'm new to autos, as my '01 was a manual, and the '96 before that, was manual, so I'm somewhat rusty on how they perform/react. Thought maybe the TC had a little higher stall.Last night, my 7 y.o. daughter wanted to ride around the block in the new dually.. Wish granted. That's when I noticed that something wasn't quite right... No low/1st gear engagement. Neither with shifter in D, or if I manually drop it to L (1), nothing, nada.. it seems to stay in 2nd gear or so.. I will add that if in D, at a stop, let off the brake and the truck starts to creep forward.. give a little throttle and drop it into 2nd, it feels to almost 'drop' a gear, as the forward progress seems to be a more positive engagement, but still no 1st. Driving 30mph, slow prepare for a stop sign, drop lever to 2, it downshifts.. drop to 1 from like 10mph, no gear change/drop occurs.. it stays in 2nd..TC lockup and such works, and with the 4.10s, 60-65mph yeilds about 1900-2000rpm.The Coolant Temp Sensor circuit is fubar somewhere, as is the tach in the I/C. The tach does read through the scan gauge, however, so the Crank Position Sensor seems to be operational.I was told this trans has a 3/36 warranty, but getting that info is proving to be a tad on the tough side..Trans looks fresh, complete with gray paint, Jasper stickers, etc., so it was apparently rebuilt in the Jasper case.Help. I need to troubleshoot this as inexpensively as I can, for obvious reasons.