A easier way to replace transmission fluid

[June]

I ordered off of Amazon a oil exchange pump. 3.5 quarts came out initially. I replaced it three times with 6 quarts with a quick drive in-between. It worked well. The original fluid looked good when checked, but looks dark in the gallon collection container. The second time also was dark, but cleaner. The third and fourth time made a noticeable change in transmission operation.

I am aware the 740 has a drain plug. That would have been much less convenient. By using the dip stick tube, nothing has to be loosened. Therefore no worries about leaking parts, or damaging anything. June

[PixelDust]

I can appreciate the calories burnt here on this project, but I think the oil pump in the trans works just fine in regard to dispensing of the old trans fluid. When done properly, you remove all old fluid with minimal mixture of the new fluid coming in.

All it requires is a salvage yard run and removal of the trans-to-trans-cooler-hose from a scrapped vehicle.

In preparation for your flush, pop out the hose on the trans cooler side, then aim both hoses into a 5-gallon bucket. Run the car until you hear bubbles, shut it down, fill it up, and repeat till clean. Once you get the hang of it, you won't spill a drop of fluid. So nice.

Sorry if you already knew this procedure and were thinking of a better way.

[abscate]

I see the convenience factor of using an external pump as a plus rather than dashing back and forth for the key, but I usually have another warm body home with us at school without a paycheck for a year.

Anything less than awesome for June DIY isn’t fitting enough.

We did the Gibbons method ( hose popped off cooler) on a 99 XC and found there was a standard size PVC hardware store size that tight fit on the ATF hose. We didn’t even clamp it.

[June]

I see the convenience factor of using an external pump as a plus rather than dashing back and forth for the key, but I usually have another warm body home with us at school without a paycheck for a year.

Anything less than awesome for June DIY isn’t fitting enough.

We did the Gibbons method ( hose popped off cooler) on a 99 XC and found there was a standard size PVC hardware store size that tight fit on the ATF hose. We didn’t even clamp it.

Thank you Abscate! My worry about Gibbons method came from a post on here awhile back. The member didn't get something about the fittings back on the radiator correctly and the line popped off during operation. This resulted in a burned out transmission. As memory serves some sort of clip problem. Using the electric pump nothing has been loosened, therefore no worries of leaks or line popping off later or even a broken nail lol!

I initially tried getting to the drain plug, but I have issue getting my top half under the middle of the car on ramps. I can't reach it... so I had to think outside the box. As it turned out it was quick and simple. The pump cost me $55 on Amazon. Another couple of bucks for the 8 foot hose used in the dipstick tube. The 740 has a long tube. A FWD car tube would be closer to the front of the car.

I drove the car a couple hundred miles yesterday and the car's transmission is quite happy. Although it seemed perfect beforehand, there is a difference (improvement) in shift quality. Also the car seems smoother accelerating in third gear. June

[MoVolvos]

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I have 2 two oil extractors so haven't needed to pull the drain plugs on the transmission or oil pan for sometime. Last year I purchased a 5 gallons bucket of transmission fluid so will buy a pump now, thanks June, to pump clean fluid into the pan. I've considered the electric pump previously, before purchasing the extractors but didn't find one that I felt was reliable from the ratings.

As mentioned, if you pull the transmission hose there could be a chance of breaking the green clip and damaging the O-ring. The previous owner or shop of the 03 S80 T6 had broken the clip and pinched and pushed one O-ring off the groove. The cars interior smelled of burned oil when we purchased it but assumed it was just motor oil. Good providence had it that as my Son began to drive off one day the hose pushed back and left a trail as he started down the street.

I will continue to do flushes and use the manual extractor to initially pull fluid out of the pan. The lower hose will then be removed for the flush while the pump will replace clean fluid. If I didn't have the manual extractors I would just reverse the hoses on the pump to extract and then to fill.

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1 Volvo Transmission Hose.png (1.86 MiB) Viewed 506 times

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WOW!!!!!!!!!!! Don't try this at home. Taking a huge chance of getting fluid all over his driveway with those garden hoses. I suppose the speed of the fluid and size of the hose allows a clean free flow.
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