I want to replace all the old transmission fluid in our '04 Jeep Grand Cherokee, but I understand that pulling the transmission pan would only drain half the fluid (even though I could replace the filter when I pull the pan). A mechanic would be able to force all the old fluid out, flush the transm…

The “Flush” machines connect to the cooling lines and “trade” fluid…Nothing gets “flushed” other than your wallet. They don’t necessarily change the fluid trapped in the torque converter either, and they ignore the filter… So drop the pan, change the filter, and refill the transmission, changing as…

You can do it, but it’s a bit of a challenge. Disconnect the cooling lines. Put a funnel on the inlet line, and put the outlet into a drain pan. Start the car and pour fresh fluid in at the same rate the old fluid is being pumped out. Once fresh fluid starts coming back out, stop. After you rec…

There is no need to flush the transmission. The proper procedure is to pull the pan, clean it out, replace the filter and refill with transmission fluid. That’s the way the transmission was designed and that’s the correct procedure.

Why wouldn’t the torque converter fluid be changed during a flush? As far as I know, the flush machine I’m familiar with uses the pump in the transmission on a running engine and works on a diaphragm principle of sorts. The transmission pump should be circulating the entire mess out, from pan thro…

As I understand the fluid exchange, you want to get the new fluid into the torque converter. What I would do is drop the pan; inspect it; clean it; replace the filter; install a new gasket; bolt the pan back on; and refill the transmission. Now disconnect the transmission outlet cooler line and ru…

You keep saying that, and in many cases (including this one) that may be true. However, there are in-fact transmissions that are designed to be serviced only (or mainly) by fluid exchange machine. The ones in my two cars are examples of such. They are sealed, have no dip-sticks, and the factory s…

I would just drain and refill a couple times in close succession. Doing that will replace enough of the fluid to make me happy.

This seems to fly in the face of conventional wisdom since a lot of manufacturers went to a sealed transmission because so many “quick change” shops added transmission flushing to their list of “services”. I can accept “fluid transfers” if properly done but transmission flushes do more harm than goo…

From the service manual: SECTION 307-01: Automatic Transmission ? 5R55S 2006 Lincoln LS Workshop Manual GENERAL PROCEDURES Procedure revision date: 06/24/2005 Transmission Fluid Drain and Refill ? Automated Equipment Printable View (16 KB) Special Tool(s) Automatic Transmission Flush an…

DIY Transmission Flush

Maintenance/Repairs

texases April 13, 2010, 6:29pm 8

To get 75% of the fluid replaced, do a drain/filter/fill, drive for a few dozen miles, then do a drain/fill. Unless the old fluid is burnt (which means you have bigger problems to deal with) this should get you roughly 75% fresh fluid. Or just do it once, replacing 50% of the fluid every 30k miles or so, you should be fine.

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DIY Transmission Flush

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