Controlling overdrive transmission

DionR said
On my ‘91 Dakota with LU and OD, it definitely does them separately. LU comes in last when getting up to speed and drops out when pulling a hill long before it kicks out of OD.

My 96 Dakota is a 4 wheel drive and only a 3.9 V6 so when it kicks down on a hill the CC drops out first followed by the O/D but when the cruise is on it almost happens at the same time due to the throttle position. @lkopaska , have you retrofitted any O/D transmissions?

Headintheclouds said
Changing 904/727 to A500/A518 I'm investigating the subtleties of controlling overdrive and lockup when gently accelerating on the freeway.

Both the PATC kit and the delay relays option drop overdrive and lockup together when the throttle is opened. I'm wondering if the TC lockup and OD are equally fragile and if it would make for a smoother drive if they were controlled independently - perhaps using vacuum for the lockup and throttle position switch for the overdrive.

Can anyone tell me what happens on a factory car with overdrive and lockup when the throttle is eased open when cruising at 60 to 70mph? how much does the pedal go down before LU and OD switch out? Do they go together? If not, which goes first and how much more pedal is required for the second change?

It will make a difference which transmission model and year you have whether it is hydraulic or electronically controlled.