Knocking sound only in drive - 1992 Explorer (automatic)

[Rupert8]

Hello,

My 1992 Eddie Bauer Explorer's engine purrs along perfectly when the vehicle is in neutral or park. When I put it in gear (and the engine is warm) there is a knocking sound from underneath whenever I have my foot on the brake.

When I start driving, it goes away. It doesn't happen when the engine is cold.

I am having a hard time locating the problem.

The transmission shifts fine all the time.

Any ideas on where to go from here would be much appreciated...

Thanks!

 

[arco777]

Have someone else put it in gear with you underneath (parking brake on, foot on brake of course). See if you can pinpoint the source of the noise. A mechanic's stethoscope may be very helpful here.

 

[Fordsgalore4]

I got the same problem with my truck but it does it in drive and reverse and i cant pin point it either someone told me its the torque converter hitting the bell housing but i dont no