I have a 2005 Tacoma with the six speed manual transmission and it jumps out of fourth gear when I accelerate, of course it doesn't happen every time, like when I take it to the dealer to have it looked at . Has anyone heard of similar problems?

 

this is an issue that the dealer should be aware of, 4th gear is common..
http://www.ttora.com/forum/showthread.php?t=77182

Not sure if it is covered here but here are some Toyota TSB's on the '05+
http://ttora.com/forum/showthread.php?t=77094

I am looking to get my rear springs on my '05 replaced under a TSB, they ride like crap...