The Tacoma is a 5 speed, 2.7 4 Cylinder, 4x4
- Hard to shift into first and second gears periodically, mostly when cold.
- Truck jerks one solid jerk periodically at low RPM and moderate to heavy throttle. (not a symptom of being in too low of gear). Is this a transmission slip, or misfire? No codes are present. When this occurs, the RPM does not change. Only seems to be a singular large chassis jerk at a time.
This symptoms are new, and did not exist prior to the service below.
What has been done within the last week:
- New spark plugs (old ones were heavy carbonized)
- changed all undercarriage fluids with 75w-90 GL-5 oil (Rear differential, front differential, transfer case, and transmission) Some of the oils were extraordinarily black. I added 25% Lucas Oil to the transmission per Lucas Oil Instructions.
I have read other topics where if these fluids were not changed enough there could be problems with new. If I have missed a thread that would describe this let me know, I had browsed the searches and saw people mostly talking about types of fluids.
Thoughts on diagnosing this would be appreciated.