Haven't we yakked about this in another Bronco Forum this week?
If so; here is what I posted in reply to the DTCs you Posted over there;
& over there you wrote that the fluid aroma was ok; you wrote; "...Fluid is full smells ok..."
So, lets see a pic or take a sample somewhere for an opinion or 3..
Wait on that filter check for now
536 - Brake On/Off circuit failure / switch not actuated during KOER test or shorted to ground (ignore for now)
636 - TOT - Transmission Oil Temperature sensor voltage out of self test range.
DTC 636 Transmission Fluid Temp (TFT) higher or lower than expected; Can be caused by a bad connector or harness (an open circuit, or short to Ground / Batt), or the transmission was overheated.
225 - Knock Sensor (KS) signal not sensed during dynamic response test (ignore if not pinging) (ignore for now)
DTC 632, Overdrive cancel switch did not change state during KOER; is possibly the result of the test being done incorrectly. When you do a KOER test, you need to cycle the switch on and off, if you did, Possible Causes:
Switch is damaged.
Damaged Powertrain Control Module (PCM).
Open harness or fuse.
Check the TPS;
See my site and go to Electrical then Sensors..look for the testing Links..
Transmission Oil Temperature sensor TOT Sensor; this is from a pal at Ford;
"...Once you remove the pan locate the sensor in the valve body and remove the electrical connector very carefully. The sensor is about the size of a pen cap. To remove the sensor carefully unlock the stop tab and twist it, pull down to remove it. It comes out before a full quarter turn is made. Put it back in the reverse order. When you get the sensor to come out be prepared to catch the trans fluid that follows behind it, you will get less than a quart out of it..."
Solenoid Pack Connector Pin-Out Diagram
Source: by Ryan M (Fireguy50) at fordfuelinjection.com
See Pins 7 & 8
It is located in da Pack between Converter Clutch Control (CCC) Solenoid & the Coast Clutch Solenoid
Transmission Oil Temperature sensor TOT Sensor Location Diagram; see page 3, Step 3
& Solenoid Locations in Valve Body; see page 4
Source: by artcarr.com
Transmission Oil Temperature sensor TOT Sensor Info in Solenoid Wiring Diagrams in a 96 Bronco & F 150
by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Bottom right of da diagram....
Try the connections first. They are usually the root of the problem.
Bottom line is - "Fluid smells a little burnt to..." suspect that is the DTC 636 reason
E4OD Transmission Oil Temperature Sensor (TOT) Overview & Wiring Diagram; "...The PCM monitors the voltage drop across a temperature sensitive thermistor. The PCM uses this information to determine transmission fluid temperature for adjustment of shift schedules & torque converter engagement schedules when the fluid is cold. Also used to adjust EPC pressure shift & torque converter schedules for temperature..."