850 tranny not locking up

[Arttu]

Hi,
My -94 850 T5 tranny is most of the time not locking up (the mechanical lockup in 2nd to 4th gears). I get a bad mpg. I also have an occational shift lock problem (could be that the brake switch is not working or the microswitch). Could these be related, i.e. if the brake switch is not working it would prevent the lockup of the tranny (like you would be pressing the brake all the time which would relase the lockup)?
Any ideas are welcome!

Thnx,
Art

 

[Guest]

Hi,
My -94 850 T5 tranny is most of the time not locking up (the mechanical lockup in 2nd to 4th gears). I get a bad mpg. I also have an occational shift lock problem (could be that the brake switch is not working or the microswitch). Could these be related, i.e. if the brake switch is not working it would prevent the lockup of the tranny (like you would be pressing the brake all the time which would relase the lockup)?
Any ideas are welcome!

I believe a electrically faulty stop lamp switch will prevent the 'box from locking up yes- i.e. if the computer is being signalled all the time that the brakes are in use cos of the faulty switch.

Tim..