Scared to do Tranny flush

[Jesus A Rodriguez]

I'm about to change the solenoid pack and wanted to do a tranny flush before I put the new fluid and filter in. My mechanic said he would do the tranny flush but not responsible if something goes wrong. I've stories where the tranny got messed up after a flush. Should I just put the new fluid in and call it a day?

 

[joegr]

Those stories are just that, stories. If your transmission is good, a flush will only do good (make it last longer). If it is already failing, a flush may make it fail a couple of days sooner than it was going to anyway. If your "mechanic" doesn't understand this, you really need a new mechanic.

Do it. Use a dealer that will put in the correct fluid (Mercon V). Don't go to Iffy Lube or similar and get the left over fluid of the day.

 

[don-ohio]

Whoever does the flush needs to understand that after they pump 4 qts. back in they check the fluid with the ENGINE RUNNING,the car on a rack and the fluid warm,but not really hot .The mechanic unscrews the center of the drain plug,and if no fluid comes out the center hole of the drain plug he pumps fluid up into the hole until it does.Let it quit streaming out until it slowly dribbles and reinstall the center plug into the big drain plug and you have the correct level. Some people say rather than having the trans. in Park,they need to have it in neutral.I checked mine in Park. don-ohio

 

[1LoudLS]

the problem is, when most people start to notice a problem with the trans, they have it flushed out hoping that will fix it (it never does...) by that time, the damage is done. so then shortly after when the trans sh!tsa the bed, they always want to blame it on the flush...

 

[joegr]

Whoever does the flush needs to understand that after they pump 4 qts. back in they check the fluid with the ENGINE RUNNING,the car on a rack and the fluid warm,but not really hot .The mechanic unscrews the center of the drain plug,and if no fluid comes out the center hole of the drain plug he pumps fluid up into the hole until it does.Let it quit streaming out until it slowly dribbles and reinstall the center plug into the big drain plug and you have the correct level. Some people say rather than having the trans. in Park,they need to have it in neutral.I checked mine in Park. don-ohio

You are not describing a flush/ fluid-exchange. The correct way to do a fluid exchange is to disconnect the transmission cooler lines and connect a specific purpose machine with a large cylinder with a divider in it. As the transmission pumps old fluid into one side of the cylinder, it forces fresh new fluid into the transmission from the other side of the cylinder. You stop after fresh fluid starts coming back. This way, all of the fluid is changed. After this is finished and the cooler lines are reconnected, the fluid level is checked and if needed, some is added.

 

[don-ohio]

Well Joe,I'm doing a `country boy' flush. I think I explained how on here earlier.It takes a lot of fluid,but it replaces it pretty completely. I don't have a fancy machine and I'm not paying a big price for something I can do at home.
Heck,that fluid and filter is pretty expensive as it is.
The main reason I posted was for him to make sure his mechanic knew the engine must be running and the fluid warm before checking the level.
You guys put me straight on that or I'da never got it right.LOL! don-ohio ^)