DIY transmission flush questions

A forum for the legendary Nissan Pathfinder and Infiniti QX4.
mvmcali
Posts: 131
Joined: Tue Nov 20, 2007 12:00 pm
Car: 2001 Infiniti QX4

Post

i was thinking about trying to flush the 'whole transmission system' as per video i saw. my understanding is if you just drain the pan and refill, you do NOT replace all the fluid that is hanging out in the torque converter , radiator/cooler , etc

my Q: does the return hose (from the radiator/cooler back to the torque converter) has suction on it created by the upstream pump? i understand there is a pump in torque converters which push the fluid thru the various components and then into the pan . there it is then pushed thru the output hose to the radiator/cooler to close the loop.

BUT... if i disconnect the output hose at the radiator and then dump it into a bucket to catch old fluid and i attach another hose to the radiator input nib into a clean bucket of new fluid... and i then run engine... will a vacuum be created to pull the new fluid into the system as the old fluid is pumped into bucket?

i want to know if this works before i destroy my automatic transmission :confused:


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