Thread: Clunky auto tranny pt 2

Thanks for help so far. Update on the issue. The clunk on downshift from 3-2 and then 2-1 only occurs when warmed up. If the engine is then switched off and about a minutes passes until a relay clicks under the dash, one restarted the clunk has gone. Appears again later one the engine has been off for a couple of hours. The loom has been changed. Sounds electrical. Could it be the trans ecu? Thanks all for any advice.

Yes the same error that suggests a comm error. The fact it corrects after turning the engine off briefly and then plays up again after several hours of the engine being off made me wonder about a tcu issue