Attention: TDR Forum Junkies 
Preface: 2nd performance trans in approx. 2/2021 (note info in signature). The 1st trans, DTT, lasted 2002 - 2021, roughly 110,000mi and was done by same builder as present trans. Anyhow, about a month or so after 2nd trans done it did a few 2nd gear starts. Oddly these happened after driving a few miles. You can tell if it doesn't shift down to low by watching the tachometer for that little blip up just before coming to a stop. I know 2nd gear starts ares very detrimental so a quick into "N", shut off and restart is what to do if it doesn't go into 1st when placing gear selector into "L". Understand the trans builder is in VA Beach and I'm in the Poconos, so driving 12 hours (round trip) for a simple warranty fix wasn't cost effective for me. In conversation with the builder it was determined to replace transducer/solenoid, which is fairly easy and I've had to do several times over the years with the old DTT, always used "quality" parts from TranStar with part numbers provided from builder so as to replace with same "updated" parts as used during build.
These 2nd gear starts are more of a nuisance than anything else, as I've learned to deal with to a point where (I feel) no damage is happening. As mentioned in the title these 2nd gear starts are "Extremely Intermittent", meaning this can go days and days without happening, or will happen after driving around town then getting on the highway for 20 or so miles and as soon as you come to a stop then go it'll be in 2nd. Most times just placing the gear selector in "L" get it into low, then I start out and shift into "D" and all is well for the rest of the day. This "rest of the day" can include; multiple stopping, shut downs, start ups, drive a few miles or many more and not occur again for days.
I'm thinking there's something electronically that happens, somewhere for some reason, but have yet to conjure what or where and how to try to troubleshoot.
So far, I've replaced the transducer/solenoid (around 4/2021), over the last several months looked at grounds (meaning removed screw cleaned both surfaces and re-scured) of course I have no idea where "all" the grounds can/could be - I do have FSM and am totally confused by the electrical diagrams as to where and how to locate "all the grounds", have removed and cleaned (with electrical contact cleaner + used dielectric grease to ward off corrosion) both male & female plug connections (including metal = not just rubber area connections) at the ECM, PCM, Trans and firewall to harness connections. Batteries are excellent, alternator and other accessories are excellent condition.
Just fishing for possible routes to follow that others having similar issues have tried.
Thanks in advance,
Joe
These 2nd gear starts are more of a nuisance than anything else, as I've learned to deal with to a point where (I feel) no damage is happening. As mentioned in the title these 2nd gear starts are "Extremely Intermittent", meaning this can go days and days without happening, or will happen after driving around town then getting on the highway for 20 or so miles and as soon as you come to a stop then go it'll be in 2nd. Most times just placing the gear selector in "L" get it into low, then I start out and shift into "D" and all is well for the rest of the day. This "rest of the day" can include; multiple stopping, shut downs, start ups, drive a few miles or many more and not occur again for days.
I'm thinking there's something electronically that happens, somewhere for some reason, but have yet to conjure what or where and how to try to troubleshoot.
So far, I've replaced the transducer/solenoid (around 4/2021), over the last several months looked at grounds (meaning removed screw cleaned both surfaces and re-scured) of course I have no idea where "all" the grounds can/could be - I do have FSM and am totally confused by the electrical diagrams as to where and how to locate "all the grounds", have removed and cleaned (with electrical contact cleaner + used dielectric grease to ward off corrosion) both male & female plug connections (including metal = not just rubber area connections) at the ECM, PCM, Trans and firewall to harness connections. Batteries are excellent, alternator and other accessories are excellent condition.
Just fishing for possible routes to follow that others having similar issues have tried.
Thanks in advance,
Joe
