Lexus GS350 ATF Service Advice

JeffKeryk

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Originally Posted by JeffKeryk
Originally Posted by The Critic
Sounds like you'll be getting a lot of exercise with pumping fluid....may want to invest in one of these: https://www.centurytool.net/ATF1002Basic_Basic_Driveline_Fluid_Filler_Set_p/asmatf1002basic.htm
Michael, as you know I am too cheap to buy and to lazy to pump. I will run a flexible hose funnel down from the top, Better yet, come on over and share some of your considerable expertise! I promise to stay outta the way...
I'll think about it. laugh BTW, this is how Honda wants you to "circulate the fluid" in between each drain and refill. Then again, this is for Honda transmissions where you can remove 40-50% with each drain and refill and you do not have a temperature restriction for checking the fluid level: "Some A/T repair procedures call for flushing the trans using Honda Genuine ATF-Z1 (and no substitutes). Problem is, where do you find the info to do that? It's not listed in the S/Ms, and if you do an ISIS search, you'll find a few ServiceNews articles on this subject, but they're rather dated, and none of them say the same thing. Even the most recent one (see "Revised A/T Flushing Procedure" in the December '00 issue) still mentions that old work horse—the PGM Tester—which we stopped supporting when the HDS first came on the scene. NOTE: The term "flushing" refers to repeatedly draining and refilling the trans with Honda Genuine ATF-Z1. Don't confuse it with aftermarket flush systems. American Honda still strongly recommends that you avoid using them on any Honda vehicle. The original procedure was written for simpler A/Ts that readily upshifted when you ran the vehicle on a lift. But A/Ts have come a long way since then, and most of the newer ones balk at shifting past 2nd gear when on a lift, unless you work the shift lever a certain way. In light of all this, we thought it was high time that the A/T flushing procedure got a facelift. So here's the latest word on flushing that works for all A/Ts: 1. Set the parking brake, and raise the vehicle on a lift. 2. Drain the trans, and refill it with Honda Genuine ATF-Z1. Refer to the applicable S/M or to ISIS for details. 3. Start the engine, shift into Drive, and release the parking brake. 4. Push down on the accelerator pedal to raise the vehicle speed to 2,500 rpm. • If the trans shifts past 2nd gear, go to step 5. • If the trans won't shift past 2nd gear, keep the engine speed at 2,500 rpm and shift from Drive to Neutral and back to Drive. Then go to step 5. 5. Make sure that the trans shifts through all the forward gears and goes into torque converter lockup. 6. Let off the accelerator pedal, and press the brake pedal to drop the vehicle speed to zero. Shift into Reverse and then into Neutral. 7. Shift into Drive, and repeat steps 4 thru 6 four more times. 8. Set the parking brake, and repeat steps 2 thru 6 two more times. 9. Drain the trans, and reinstall the drain plug with a new sealing washer. 10. Refill the A/T with ATF-Z1."
 
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Change filter too. You will get out more fluid, close to 4qt. At least that is how much I got out doing drain and filter change in 6 speed Aisin in SIenna.
 
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When I did the ATF change on my parent's LS430, I leveled the car on ramps and jack stands. Then I drained the pan, refilled, set the cold fluid level, and then ran the car through the gears. I did this spill and fill 3 times and replaced the filter. Eventually, I had The Critic set the cold level properly and I was off by 2oz.
 

JeffKeryk

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Originally Posted by nthach
When I did the ATF change on my parent's LS430, I leveled the car on ramps and jack stands. Then I drained the pan, refilled, set the cold fluid level, and then ran the car through the gears. I did this spill and fill 3 times and replaced the filter. Eventually, I had The Critic set the cold level properly and I was off by 2oz.
I imagine The Critic set the fluid level using the straw dribble routine.... How much fluid drained each time? I have heard about 2.5 quarts and at about 1 quart more in the filter.
 
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Originally Posted by JeffKeryk
Originally Posted by nthach
When I did the ATF change on my parent's LS430, I leveled the car on ramps and jack stands. Then I drained the pan, refilled, set the cold fluid level, and then ran the car through the gears. I did this spill and fill 3 times and replaced the filter. Eventually, I had The Critic set the cold level properly and I was off by 2oz.
I imagine The Critic set the fluid level using the straw dribble routine.... How much fluid drained each time? I have heard about 2.5 quarts and at about 1 quart more in the filter.
I got out a little more than 2 quarts IIRC. I had 10 quarts of WS for the job.
 
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