Quote:
Originally Posted by djctoto
Nothing has been taken out of context.
It's hard to believe your providing this level of misinformation when in your video, link provided below.
You're using a procedure as Quoted in your video for a street rod package.
"After scouring the internet for information about how to change the ZLE's A10 transmission fluid, I stumbled upon the installation instructions for the @GeneralMotors Performance Catalog installation instructions for the LT4/A10 street-rod crate package."
The overfill was measured using the exact procedure as recommended for the Zl1-1LE by GM with the engine running, the car perfectly level and the transmission fluid temp at 207 degrees F which is exactly in the middle of the recommended temp range with the fluid temperature between 203 degrees F and 212 degrees F as measured by the I Banks gauge from the CAN buss / factory sensor.
Although your car's transmission may not experience issues, mine came from your shop with the fluid overfilled by 1 quart after having the transmission fluid flushed and was shifting erratically on track.
After I checked and refilled the level per GM's procedure for the 1LE it has had no further shifting issue.
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Once again... you are wrong and spreading more mis-information.
The publication I shared was the means to access, check and change the fluid in the ZLE A10 Camaro. YES, indeed this is a publication for the exact same transmission that is kitted for Hot-Rods, race cars and whatever your dreams could come up with... including full-blown drag cars running 8's in the quarter mile right now in a friend's Cadillac. The ONLY difference is these come with a slip yoke tailshaft from the Tahoe PPV instead of the flanged rubber donut design... that's it! As a GM Supermatic transmission, it still matches the fluid level of the ZLE.
Now... lets address the other misinformation you shared.
The thermostatic level begins to open at 140º internally and will be fully open by 170º.
My transmission never exceeds 200º on the track in traffic... a fact you witnessed riding in my car it was at 169º at Road Atlanta on a full blast session and 165mph on the back straight! SO... if you are allowing your transmission to heat up by whatever means you did to get it there, you are creating your own problem by using the wrong info you shared of the thermal range.
As an FAA (Federal Aviation Administration) Certified Engineer with 20 years of experience in developing hydraulic systems for Dassault-Falcon, Bombardier, Gulfstream and other contracts with Lockheed-Martin on the AH64 & UH60 helicopters... your heated 13-14 total quarts of fluid at 207º will have an expansion rate of 2.3-3.1oz/quart over the target temperature listed by the manufacturer. That roughly equals...
ONE QUART Overfilled.
Review the document below... if you are getting erratic shifting then it is almost always due to the fluid getting air in it and if you are racing on Club Motorsports track with lots of elevation changes, you will get this if the fluid is NOT at the high level of the range. Aerated fluid will cavitate the pump and create foam inside which is the direct reason for "erratic shifting." I remedied this issue by moving my transmission cooler to the passenger side, reversing the flowpath to cool the transmission directly from the cooler instead of from the eLSD and with a higher volume, at a higher mounting location than the pan's fluid level. I learned this issue from full-throttle pulls under the bridge at turn-11 at Road Atlanta pulling -Gs and monitoring transmission command/actual pressure logs. This is where the difference lies between those who sell parts to those who actually develop solutions.
I am sorry you are having issues with your car, but if you continue to follow what the 98% Majority of ZLE owners who have virtually ZERO actual road course track experience and offering their drag-racing background mentality, I will always be
WRONG. I have YET to see ONE ZLE on the track other than Jeremy Lowder's Pikes Peak car (that I also built the cooling systems for) go faster than my car for the endurance of a full 30 minute session flat out. I'm always available for a call if you have questions about your car.