DIY Auto Transmission flush? - Page 4 - Toyota FJ Cruiser Forum
Transmissions / Transfer Cases / Traction Aids This area is for discussion, questions and problems with the FJ Cruiser's gear train, including topics on A-TRAC, VSC, locking diffs, gear ratios, manual vs. AT, etc.

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post #31 of 487 (permalink) Old 01-11-2010, 06:11 PM
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re: DIY Auto Transmission flush?

Quote:
Blown383 previously said: View Post
16 quarts to flush and refill the tranny? Isn't the Toyota ATF fluid about $7.00 a quart? If thats the case it just might be worth paying the dealer the extra $100 to flush it with the machine.

-B
Dealer wants like $300 to do the change... Save $200 that is really easy procedure.

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post #32 of 487 (permalink) Old 01-21-2010, 03:04 PM
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re: DIY Auto Transmission flush?

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post #33 of 487 (permalink) Old 03-20-2010, 11:37 PM
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re: DIY Auto Transmission flush?

Hey Bartt, today I changed my transmission fluid following your instructions step-by-step! Awesome write up, short and precise! Also gives me a good understanding of how the transmission circulates the fluid.

All I can say is Awesome!!

Quote:
bartt previously said: View Post
Finally getting back to this...
I did this procedure over the weekend, so for anyone looking to do it also, here is what you will need:

16 qts of WSATF from your dealer.
an empty 5qt oil jug that has the little see thru part and qt marks on the side (most of the oil jugs have them)
about 4 feet of 1/2"ID x5/8"OD clear plastic tubing
a funnel that fits inside the tubing above
( i picked up the tubing and a 1/2 pint funnel at HD for about $10 total)
a short length of clear tubing (3/8" I think) to drain the old fluid.
a 24mm box end wrench to get the fill plug off.

Procedure:
Start by opening the fill plug with the wrench, its on the passenger side toward the rear of the gearbox. Clean it up and set it aside.
From the engine compartment run the 1/2" tubing from the middle of the firewall back down to the fill port keeping it away from the exhaust pipe and cats. The 5/8" OD fits the fill port pretty nice and should not fall out once you push about 3/4" of it in there. I only pushed that much in and it did not leak while filling. Attach your funnel to the other end of the tube and tape it up with some electrical tape just in case.
Locate and remove the black tube on the bottom line of the radiator, this is the return line to the gearbox. Put your clear tube on the radiator nipple now showing. If it is snug you don't need a clamp since there is very little pressure. Put the other end into your empty 5 qt jug.
Now start your engine and watch as the old fluid goes into the jug. It should take about 10-15 seconds to dump 2 qts. Stop the engine and put that much new fluid back in by pouring it into the funnel. Repeat this until you have gone thru all 16 qts. Make sure that each time you dump some, you put exactly that much back in. By the time you have gone thru all the new fluid, the old fluid coming out should look new too...
Now clean up, put the plug back in, the return line on the radiator and give it a test drive.
This is from memory so if I forgot something, please post up...
Hope it helps..
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post #34 of 487 (permalink) Old 05-08-2010, 05:22 AM
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re: DIY Auto Transmission flush?

Being the twisted soul I am, I want to replace the oil with one that gives higher pressures. Back in the day, the trick was to use Ford tranny oil in our hot rods with GM trannies for a bit more ooomph. Supposedly raised hydraulic pressures, resulted in slightly firmer shifts and less wear'n tear on the clutch plates. And though it may have been nothing more than a placebo effect, the few times I did this oil swap seemed to result in slightly firmer shifts.
Spposedly, B&M auto tranny oil was/is nothing more than glorifed, blue-coloured Ford oil.
Can anyone confirm or deny the theory? If not, can anyone tell me if it's possible that higher pressures would indeed have a negative effect on the transmission?
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post #35 of 487 (permalink) Old 05-10-2010, 07:38 AM
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re: DIY Auto Transmission flush?

That would not be a good idea. Using a non-Toyota tranny fluid would be roughly equi valent to getting a blood transfusion with the wrong blood type. The WS fluid used in our trannies is a lower viscosity than the other mass-market fluids. If you want firmer shifts, get a replacement valve body or see if the tuning devices can alter shift line pressure.
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post #36 of 487 (permalink) Old 05-10-2010, 10:56 AM
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re: DIY Auto Transmission flush?

Quote:
peter2772000 previously said: View Post
Being the twisted soul I am, I want to replace the oil with one that gives higher pressures. Back in the day, the trick was to use Ford tranny oil in our hot rods with GM trannies for a bit more ooomph. Supposedly raised hydraulic pressures, resulted in slightly firmer shifts and less wear'n tear on the clutch plates. And though it may have been nothing more than a placebo effect, the few times I did this oil swap seemed to result in slightly firmer shifts.
Spposedly, B&M auto tranny oil was/is nothing more than glorifed, blue-coloured Ford oil.
Can anyone confirm or deny the theory? If not, can anyone tell me if it's possible that higher pressures would indeed have a negative effect on the transmission?
These guys ( IPT Performance Transmissions Torque Converters and Transmission Parts for Ford, GM, Chrysler, and Import vehicles make a valve body kit for the 5AT's in the FJ that will give you quicker, firmer shifts. DEWFPO
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post #37 of 487 (permalink) Old 05-12-2010, 03:54 AM
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re: DIY Auto Transmission flush?

Thanks for the heads-up guys, prolly saved me lotsa grief
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post #38 of 487 (permalink) Old 05-23-2010, 10:16 PM
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re: DIY Auto Transmission flush?

First of all, thanks to everyone for taking the time to write up your experience. It makes it a lot easier to tackle these things on your own.

I never saw a post on whether or not the strainer had filter media that should be replaced. Anybody know the answer?
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post #39 of 487 (permalink) Old 06-03-2010, 02:06 PM
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re: DIY Auto Transmission flush?

I need instructions with pictures next person to do this pleeeease take pics?
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post #40 of 487 (permalink) Old 06-05-2010, 07:02 PM
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re: DIY Auto Transmission flush?

Quote:
[email protected] previously said: View Post
I need instructions with pictures next person to do this pleeeease take pics?
First off I want to thank bartt your parts list for this job and instructions were spot on Hoses fit snug and didn`t need clamps or anything. This job is a easy as changing your oil. Here are a few pictures to see what I did


Heres the parts list 16 qts. of toyota ATF WS trans fluid.


3/8 ID clear hose hooked to the lower trans hose nipple coming out of the radiator


Same hose running out of the bottom of the truck into bottle measure the fluid coming out


1/2 ID clear tube taped to funnel and zipped tied to stay there while filling


same hose shoved in the fill plug about an inch


What the fluid looked like compared to new

Hope this helps this job is as easy as it gets
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Last edited by Sanderhawk; 06-06-2010 at 06:17 PM.
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