The 4-speed transmission on my 87 Westy is popping out of 4th gear when
under load.  All the other gears are OK.  My mechanic says I need a
transmission overhaul.  Assuming he's right -

1) How many hours of labor is reasonable for pulling the tranny?
2) What's a reasonable price for a rebuilt tranny?
3) Should I consider replacing the 4-speed with a 5-speed (if its an
option)?

Thanks in advance for any info/advice!!

Dale
dale@dalemconsulting.com