I'm having some shifting issues with my stock 4L60 (700R4, pre-4L60E) in my 91 Vandura, hopefully somebody can shed some light on these.
My issue seems similar to what bowtie overdrives call Long Spring Syndrome. It seems like it delays upshifts like the throttle is pressed harder than it is, and the torque converter unlocks pretty hard (maybe with a downshift to 3rd, I can't tell for sure) at 55mph / highway speeds on approaching a mild hill if you give it any additional throttle.
I've tried adjusting the tv cable by the stock method, but it doesn't really ratchet out on its own with the self-adjustment. If I hold the button back in while opening the throttle, the cable will ratchet out, but I'm not sure if that's too far or if that is an acceptable way to adjust things. Is the tv cable supposed to be have any slack at idle with no throttle?
My problem is that my current tv cable and throttle linkage look different than any other photos I've seen. The tv cable has a cylinder on the end, and a different style adjuster button than any I've seen. And the throttle linkage is circular, with the throttle cable wrapping around it in a slot and the tv cable wrapping around it in the other direction in another slot. Is this the right linkage for a 305 TBI, or was this replaced with something else at some point?