Trans Fluid

parbreak · 01-19-2020, 11:23 AM

Getting ready to change torque converter to a Circle D. What trans fluid do I need for A8 and anyone have part # if GM fluid?

arpad_m · 01-19-2020, 12:31 PM

Quote:

Originally Posted by parbreak

Getting ready to change torque converter to a Circle D. What trans fluid do I need for A8 and anyone have part # if GM fluid?

Mobil 1 Synthetic LV ATF HP, part number 19417577

https://gm-techlink.com/?p=11127

JCunningham · 01-29-2020, 09:18 PM

the only fluid is what arpad_m said Mobil 1 Synthetic LV ATF HP

TP2SS · 01-30-2020, 11:35 AM

Wouldn't it depend on whether the flush for the shudder has been done?
I know they're probably compatible since there's no way they can completely flush/clean the whole thing in the TSB, but isn't it better to have a higher ratio of the new fluid? I realize the TC is the usual issue with the shudder, and the OP is changing it, but probably not the best to swap the TC and just add the new type fluid without doing a full flush.
If I were doing this, I'd take it in and have the TSB done FIRST, then change the TC. The swap is going to void the warranty so better to get the TBS done before you swap and at least be sure it's got the latest fluid.

JCunningham · 01-30-2020, 01:03 PM

they flush 20 qts through the system that holds 12qts. they get it all out. the dealers not going to know he changed the tq because they are not going to look for that. id do the converter with the new fluid then get the tsb done. but then with the aftermarket converter he could probably use a high quality low viscosity ATF like Amsoil if he wanted. when i replied i wasnt thinking about the converter being aftermarket. its bad converters and epa tuning that causes the problem. the new fluid bandaids the bad converters and tune for awhile. did Circle D say anything about it or did they just give you the use oem in oem applications like tremec does.

01-19-2020, 11:23 AM	#1
parbreak Drives: 2017 50th Camaro SS Join Date: Jul 2016 Location: Maryland Posts: 525	Trans Fluid Getting ready to change torque converter to a Circle D. What trans fluid do I need for A8 and anyone have part # if GM fluid? __________________ 50th Anniversary Edition \|Borla Atak and 60606 mid pipes\| Kooks 1 7/8" \| ProCharger Stage II \|305/45/17 DRs \| Circle D 3500 stall \| LT4 fueling \| Custom made Lowside Aux Pump \| Alky Control Meth \| DSX E85

01-29-2020, 09:18 PM	#3
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	the only fluid is what arpad_m said Mobil 1 Synthetic LV ATF HP __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

01-30-2020, 11:35 AM	#4
TP2SS Drives: 2016 2SS Convertible Join Date: Dec 2019 Location: SE Michigan Posts: 576	Wouldn't it depend on whether the flush for the shudder has been done? I know they're probably compatible since there's no way they can completely flush/clean the whole thing in the TSB, but isn't it better to have a higher ratio of the new fluid? I realize the TC is the usual issue with the shudder, and the OP is changing it, but probably not the best to swap the TC and just add the new type fluid without doing a full flush. If I were doing this, I'd take it in and have the TSB done FIRST, then change the TC. The swap is going to void the warranty so better to get the TBS done before you swap and at least be sure it's got the latest fluid. __________________ 2016 2SS Convertible Hyper Blue/Ash Gray A8 Magnetic Ride Control Dual Mode Exhaust 2019+ version Split Spoke Silver Wheels Navigation Silver Rally Stripes

01-30-2020, 01:03 PM	#5
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	they flush 20 qts through the system that holds 12qts. they get it all out. the dealers not going to know he changed the tq because they are not going to look for that. id do the converter with the new fluid then get the tsb done. but then with the aftermarket converter he could probably use a high quality low viscosity ATF like Amsoil if he wanted. when i replied i wasnt thinking about the converter being aftermarket. its bad converters and epa tuning that causes the problem. the new fluid bandaids the bad converters and tune for awhile. did Circle D say anything about it or did they just give you the use oem in oem applications like tremec does. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

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