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Old 08-01-2011, 03:06 PM
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automatic trans

I have a 2006 chevy siverado 2wh drive 1500 with the 4.7 engine and automatic trans. How do I flush the transmission?
Any help you can give me will be greatly appreciated.
Thank you
Peace and Blessongs,
Donna

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Old 08-01-2011, 03:08 PM
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Why.....Normally, a fluid filter change doesnt get all the old fluid out.....A tranny shop may have equipment to get all the fluid out
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Old 08-02-2011, 03:28 PM
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Quote:
Originally Posted by donna hernandez
I have a 2006 chevy siverado 2wh drive 1500 with the 4.7 engine and automatic trans. How do I flush the transmission?
Any help you can give me will be greatly appreciated.
Thank you
Peace and Blessongs,
Donna
Two ways neither of which I'm fond of but since the manufacturers have done away with the converter drain, your stuck with one of these.

One is to drill a small hole 1/8 to 1/4 inch in the converter and wailt till Christmas for it to drain all that oil, then plug the hole with a blind rivet and sealer.

Two is to idle the engine with the cooler lines directed into a bucket till it pumps all the oil out.
1. ID which line at the radiator is the pressure line to the cooler, since different installations may move this Iíll suggest you trace the circuit back to the tranny to be sure which is the pressure and which is the return. Pressure comes off the tranny at the bottom fitting and returns to the top for the 4L60E.
2. Raise the front of the vehicle enough to get a 6 quart or larger drain pan under it.
3. Disconnect the pressure cooler line from the radiator and connect a piece of hose from that line to the drain pan.
4. Best to have a friend start and stop the engine, but you can do it yourself, start the engine at idle and keep it at idle. The trannyís pump will empty its pan and converter.
5. When the flow starts to sputter, shut the engine off.
6. Wait a few minutes for the remaining oil to drain back to the pan. While waiting empty the drain pan if necessary and keep track of how much oil was removed from the transmission.
7. Replace the drain pan and hose, then restart the engine, when the flow sputters again shut the engine off.
8. Now you can drop the transmissionís pan, clean it, replace the filter and reinstall the pan with a new gasket.
9. Put in a couple quarts of fresh oil and restart the engine, when the discharge turns to clean oil shut the engine off .
10. Reconnect the cooler line to the radiator.
11. Add 4 or 5 quarts of oil and start the engine.
12. Cycle the trans through the gears and check the fluid level on the dipstick.
13. Proceed to refill the transmission till the oil level hot and in drive reaches the full mark on the dipstick.


Third choice is to take it to a shop.
Bogie
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Old 08-02-2011, 05:00 PM
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oldbogys way

i use a similas aproach,only difference is i run the oil into a clean container then i have a ford engine oil pomp hooked to a filter and re use the oil if oil burnt then i do not re use.most trans shops use a fancy filter system and re use all fluids.engine oil filter does a prity good job.i use this set up to pre lube engins as well
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Old 08-02-2011, 10:02 PM
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Quote:
Originally Posted by cliff tate
i use a similas aproach,only difference is i run the oil into a clean container then i have a ford engine oil pomp hooked to a filter and re use the oil if oil burnt then i do not re use.most trans shops use a fancy filter system and re use all fluids.engine oil filter does a prity good job.i use this set up to pre lube engins as well

transmission shops may do that in canada, but i can tell you that does not happen here.
ive worked in shops from 1 end of the country to the other.
the types of fluid exchange systems that are commonly used have either 1 tank for new fluid and 1 tank for old. the other type that i have used, uses a single tank with an internal bladder. 1/2 for new, 1/2 for old/used fluid.
to filter transmission fluid for re-use is a bad idea, there are certain detergents and especially with todays cars, friction modifiers. new fluid repenishes the life of the fluid to help make a transmission last.
if your going to do a job, its best to do it right the first time.

Last edited by tnsmith10; 08-02-2011 at 10:07 PM.
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Old 08-03-2011, 09:56 AM
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Quote:
Originally Posted by tnsmith10
transmission shops may do that in canada, but i can tell you that does not happen here.
ive worked in shops from 1 end of the country to the other.
the types of fluid exchange systems that are commonly used have either 1 tank for new fluid and 1 tank for old. the other type that i have used, uses a single tank with an internal bladder. 1/2 for new, 1/2 for old/used fluid.
to filter transmission fluid for re-use is a bad idea, there are certain detergents and especially with todays cars, friction modifiers. new fluid repenishes the life of the fluid to help make a transmission last.
if your going to do a job, its best to do it right the first time.
I'll second this, oil whether engine or transmission is complex stuff, the oil itself is to a very large extent just a carrier for all kinds of consumable chemistry including stuff that does rust prevention, anti-foam additives really important as foamed oil quickly destroys expensive parts, detergents that clean up sludge from chemical reactions and wear, and dispersant's that keep these products suspended till the filter can capture them, anti-wear additives for high load protection in the gear mesh and protection of the material from which the clutch and band friction elements are made of (this probably more than anything is the difference between manufacturer specification where an incorrect oil type can take out the tranny in a New York minute), anti-oxidation compounds that keep friction elements from burning at elevated temperatures, viscosity stabilizers that hold the oil thickness in an acceptable range from cold to high-temperatures, gasket and seal conditioners that keep these things from becoming brittle and failing.

So simply cleaning the junk out that is circulating with the oil does nothing to restore the chemicals that are performing the myriad of duties the oil is doing beyond supplying operational pressure.

Bogie
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