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Old 10-30-2008, 06:00 PM
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Default How much transmission fluid?

After draining tranny and new filter how many quarts of fluid should be put back in?
I put 5 quarts in and it gives me a high reading on the stick, i checked with engine running (hot) and in park.
Does it need 20 hwy miles on it first then check right after?
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Old 10-30-2008, 07:56 PM
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Don't drive that Elky with the transmission over filled. A lot of transmissions will only take about 3 quarts after draining and filter change. Did you idle the engine parked thru all the forward gears and reverse, then check the level?

Using a suction gun and a long hose attached you can suck the excess fluid out of the transmission thru the fill tube. Make sure the hose is well attached, you don't want it to come off inside the fill tube.

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Old 10-30-2008, 09:47 PM
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couldnt I just loosen some bolts on the pan and let some come out that way?
or would that cause future leaking?
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Old 10-30-2008, 10:15 PM
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If you loosen the pan it will compromise the gasket and will leak until you replace it. New rubber pan seals may not leak but I wouldn't count on it.

I just did a filter change and fill on my Th400. Most of the fluid stays in the torque converter and about a pint will stay in the tranny cooler and lines. I know mine took about 3 quarts to refill. Of course I also have a huge external tranny cooler in line with the built in tranny cooler in the radiator so I have an extra half pint of capacity

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Old 10-30-2008, 10:36 PM
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You could undo one of the transmission cooler lines connected to the radiator and have someone start the engine and let it pump fluid into a 3-lb coffee can or some other container. Have the person that started the engine shut if off when you think you have drained a couple of quarts. You could put a mark inside the container at the two quart level.

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Old 10-31-2008, 09:26 AM
ole george ole george is offline
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Default HOW MUCH TRANSMISSION FLUID

Whatever you do . don't overfill you A/T. Overfilling can cause the fluid to froth up, causjng cluch pressure to decrease and allowing the clutches to slip and burn out. I'm glad your checking this out'
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Old 10-31-2008, 12:48 PM
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Ok guys i got it to proper level now.

Considering the pan seal is cheaper than a new transmission i decided to compromise the seal and let some spill out (into a recyclable container)

After checking dip stick i drove 20 hwy miles and rechecked and it read just a slight bit low!
No leaks from the pan thus far, i will keep a good eye on it
the clean piece of cardboard is under the car right now just to see

Hey ole george you sound like my Dad, he was a stickler for fluid levels
and always warned of the consequences..
Thanks guys,
Dave
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Old 10-31-2008, 08:20 PM
ole george ole george is offline
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Default How much transmission fluid

Son, some of us old guys have some good war stories to tell.
At work we found a severe warranty problem with THM400s.attributed to fluid overfill. We found the cause was a well meaning foreman kept cutting off the frayed end of the plastic hose used to suction off the fluid to the proper level, like dougs85 suggested.The THM400 is really sensitive to overfill.
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Old 05-13-2009, 09:04 PM
Ted Dubree Ted Dubree is offline
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I changed the filter and some of the fluid in my 700R4 transmission. I checked the capacity of the pan. Four quarts got it to within 1/4 inch of the top of the pan, I added more to get it up to the full cold mark. Haven't checked it hot as of this date, have other problems to solve.
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