This problem started yesterday. Don't think I've ever experienced it before except occasionally with reverse. The car's a 98 Corolla approaching 230,000mi. Trans oil was changed with semi-syn store brand 75w90 around a year ago.
The transmission has begun to slightly show its age with occasional grinding when shifting (worn synchros), but never ever has slipped, chattered, or made funny noises.
Now going from 3 -> 4, if I apply any gas at all, pops right into neutral every time. Rest of the gears are still OK.
What could be the causes of this, and what is the easiest/simplest thing to start with? Thank you much.
The transmission has begun to slightly show its age with occasional grinding when shifting (worn synchros), but never ever has slipped, chattered, or made funny noises.
Now going from 3 -> 4, if I apply any gas at all, pops right into neutral every time. Rest of the gears are still OK.
What could be the causes of this, and what is the easiest/simplest thing to start with? Thank you much.