98 4L aw4 TC wont unlock at idle in drive

[DaveVmax]

i changed the lock up solenoid with an older one from a 92 aw4


put it in and tried it.

has an angry vibration in D at idle and wants to GO forward more than usual.

so for some reason its staying locked up.

 

[sidewaysstarion]

Are you sure it's staying in lockup? Did you try driving along at 50 and with your foot still on the gas tapping the brakes and watching to see if the rpms go up when it unlocks the converter?

 

[old_man]

My thought is the brake switch as well.