Hi guys, Is there any way I can tune slightly the shift points for the TH200 transmission. It has a connector on the left hand side above the pan which I believe is a lockup. This didn't seem to be working recently until I realised the torque converter had come loose a tad, identified by a knocking on startup and in reverse. Anyway, I have torqued up the bolts for this and it seems like the clutch wants to engage. So that will save my economy a little bit. Though it does seem to engage quite quickly, almost instantly from entering into third gear. Where does the wire from the transmission go to? Is it Electronically controlled or a combination of electrical and connected to a vaccum diaphram or to an intake vaccum? Every few months I find I am replacing a vaccum line here, or a vaccum line there. Totally factory standard 1980 350 and th200 with the huge amount of spaghetti vaccum lines cris-crossing ontop of the engine.. Transmission pan says "METRIC" on it. But I have two things besides: 1) When cold and on choke, the engine doesn't want to shift up to 2nd until around 18 to low 20's mph, and then to third at 35-40. When warm it does shift much better (at a lower speed), but it often doesn't like to shift up automatically unless I am accelarating decisively (not aggressively- but firmly on a part throttle, as if I was to get to motorway speeds). It feels smooth when doing the shifts, however. 2) Part throttle shifts around town can seem to be delayed unless manually implemented by releasing the throttle and waiting for the shift and engaging the pedal again. Sometimes, the engine can hang onto first gear at 15mph and won't change to second unless I command it with the above proceedure. Both above points have been apparent in the car since I purchased it with original 23k miles. It now has 30k, and nothing about the above has changed at all and none are a new 'problem'. Any way I can change this? Is this just a design of this transmission, and non-adjustable. I don't know anything of this transmission, so any help would be greatly appreciated. I'm likely thinking that I want to implement a manual switch on the lockup so that it doesn't keep enging and disengaging in a loop during certain situations. But with a switch that will 'throw' off (like a breaker) the same way as when the brake is applied for ease of use, but more of a control over it, for example in the above situation. The connector only has one (brown?) wire going to the trans. Thanks in advance.