Transmission flush or fluid and filter change?

[burntoast16]

We bought a 16' yukon xl with the 5.3l and 6 speed about year ago with 86k. Now has about 93k on and getting ready to service the transmission. Is a complete flush recommend or is just dropping the the pan and replacing the filter and fluid? What fluid is recommend, I thought I saw something to use an updated fluid?

 

[Jonmurphy]

We bought a 16' yukon xl with the 5.3l and 6 speed about year ago with 86k. Now has about 93k on and getting ready to service the transmission. Is a complete flush recommend or is just dropping the the pan and replacing the filter and fluid? What fluid is recommend, I thought I saw something to use an updated fluid?

You're long overdue for a complete flush Pump it out to coolant lines make sure you get any Debris out Of the system.I'm telling everybody else Put a couple of car filters in the Coolant line .. Be sure your temperature is under 200 at all times

 

[NickTransmissions]

We bought a 16' yukon xl with the 5.3l and 6 speed about year ago with 86k. Now has about 93k on and getting ready to service the transmission. Is a complete flush recommend or is just dropping the the pan and replacing the filter and fluid? What fluid is recommend, I thought I saw something to use an updated fluid?

Do both but drop the pan first so you can see if there's anything concerning at the bottom of it before you spend a bunch of $$$ on a fluid flush. If there's a whole bunch of burnt clutch material or metal/bronze etc put the pan back on with a few bolts then yank it out for overhaul.

 

[B-train]

Agreed ^^^^^.