Here is the issue, when on the highway, or occasionally around town, the trans will rapidly drop out of OD
, and then shift back up. It happened to me the other day about six times within a 5 minute period on the highway, speed was 65 mph, flat ground, and constant throttle position, after the little fit, it stopped and did not happen again for the rest of the trip, about 10 miles.
Truck has 217k on the motor.
The trans is a fresh rebuild, from a reputable builder, with less than 5000 miles on it.
Trans fluid is less than 2k miles old, and is mobil 1. synthetic.
Did a pressure check, all of the readings are well within specifications, most are slightly on the high side.
All of the brake light bulbs are working.
Did a scantool switch test, all of the switches appear to be working.
Checked both of the connections at the solenoid pack and the mlps, neither show signs of moisture or trans fluid on the pins, both have been dielectric greased.
I have not checked the tps
voltage, nor the mlps voltage yet.
Speed sensor is slighly bouncy at certain mph, but 65mph is one of the steady sweet spots.
Trans temperature rarely gets above 180*, only after a long pull up a steep mountain grade with my trailer, and even then it only hit 205*.
Anyplace in particular i can start troubleshooting further?