loss of 5th and 6th gear at high speed

1 - drive legally

2 - check out the 360 section's threads on bushings linkages etc

 

Have the dealer arrange to test the car on a dyno where they can get the speeds necessary to determine the problem.

 

Andy- Check for lateral play on the gear lever, or just put in a Hill Engineering bushing as a preemptive move, since the original will eventually fail. Then if you still have a problem, look for more expensive solutions that involve the dealer.

Taz
Terry Phillips

 

They CAN fail. I certainly would not say they will. The OE part is still operating just fine in the vast majority of cars out there.

 

Common problem. It is an adjustment. The problem is the adjustment is rather coarse and it is difficult on some cars to get the lateral adjustment correct for R and 5/6.

Also I don't know how many miles the car has on it but those POS rubber shifter cable ends are junk and do wear out. I have been meaning to design some replacements with heim joints and a proper turn buckle so good adjustments can be made and get rid of the rubbery feel at the same time. Never have had the time though.

Your mechanics are doing the classic mistake in their diagnosis. They are trying to get it to select 5+6, they are not trying to get it to NOT select 5+6. Using that method as a yardstick I can give every rotten shifting car a pass.

 

Plus 1 !!! Had the same problem !!! Brian is right !!!

 

Sounds like you need an assistant.

 

shifter bushing gets my vote.

http://ferrarichat.com/forum/showthread.php?t=249934&highlight=shifter+bushing

let us know what you find out