i have a 2001 outback and i have a 2000 impreza transmission in it. ever since i put the impreza transmission in it it shifts very slowly if i have to accelerate quickly. if i drive at a nice pace it shifts smooth and quickly like normal but if i have to step on it there is about a second or 2 delay between shifts the engagement of the gears are smooth just a long delay before doing so. any ideas what may be causing it? the transmission suposedly has about 100,000 miles on it. i have tried putting trans-x in it with no change.

Edited February 19, 20224 yr by sirtokesalot

On 2/19/2022 at 9:31 AM, sirtokesalot said:

 i have a 2001 outback and i have a 2000 impreza transmission in it. ever since i put the impreza transmission in it it shifts very slowly if i have to accelerate quickly. if i drive at a nice pace it shifts smooth and quickly like normal but if i have to step on it there is about a second or 2 delay between shifts the engagement of the gears are smooth just a long delay before doing so. any ideas what may be causing it? the transmission suposedly has about 100,000 miles on it. i have tried putting trans-x in it with no change.

Are there any check engine or AT flashing lights? 
ATF is correct level?
 

Check the resistance of the shift resistor.  Or swap in another one. 

Check throttle cable for any signs off odd adjustment. 

If that TPS is adjustable like old models, maybe do an adjustment?  The procedure is listed in the FSM if applicable still in 2000 vehicles. 

Try a different TCU?  I've swapped TCU's without zero noticeable difference on engine swapped cars.  I wouldn't think it would change anything for trans swapped cars but worth a shot if you have reasoable ability to get a TCU.

 

 no flashing at light no cel light atf is clean and full maby 8000 miles on it. i have tried a different tcu with no change. how can i check the resistance of the shift solenoid?