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#1
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Help Please - Trans Fluid Level Mark on Dipstick
Anyone know where the fluid level should be on the dipstick when the transmisison fluid is cold (after sitting all night).
The owner's manual says it should be 30mm below the lower notch when the fluid is cold. |
#2
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I've never heard of checking the trans fluid level when the transmission is cold. I always thought it was supposed to be between the two marks when the transmission is hot and the engine is running in park...
year/model car? |
#3
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Agree... I assume that you had some catastrophic loss of fluid and you want to ensure it's neither over-filled nor under-filled until you can check the level warm. In that case, go by the cold measurements you see outlined in the manual until you can check it properly.
__________________
Current: 2021 Charger Scat Pack Widebody "Sinabee" 2018 Durango R/T Previous: 1972 280SE 4.5 2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi" 1999 Chrysler 300M - RIP @ 221k |
#4
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Thanks guys for the replies.
What is the reason to have the engine running and trans in park? Also, will the transmission warm up with the engine running in park. I thought that only driving the car would warm up the trans fluid. My mechanic overfilled the trans and I wanted to know how much needs to be drained out. Taking it back to my Mecedes mechanic is not an option right now due to a lack of "my time". |
#5
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If your engine is off and the fluid is cold, the level can vary widely based on how cold it is (is it ambient at 30° F, 60°F, 90°F, is the trans still slightly warm at 120°F, 150°F?), the amount that's in the torque converter, etc. However, operating temp is fixed and the temp does not vary much when at operating temp, and when the engine is running the torque converter is at proper operating level. This is when the transmission is the most consistent and why this is when the fluid level should be checked.
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Current: 2021 Charger Scat Pack Widebody "Sinabee" 2018 Durango R/T Previous: 1972 280SE 4.5 2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi" 1999 Chrysler 300M - RIP @ 221k |
#6
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Also, when the engine is not running the torque converter will drain back into the transmission. That will make the level seem higher than it actually is.
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#7
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More data needed
Quote:
1972 280se 4.5 .
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#8
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Okay now I understand why you get a more accurate reading with the engine running and trans fluid warmed up.
Did not know about the torque converter draining the fluid back into the pan. Yes, this is on my 72 280se 4.5 Thank you again to you all. |
#9
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Does his car have a torque converter or is it like mine that has a fluid coupler, and does the fluid coupler have any similar affect on readings?
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1962 220SE W111 Coupe, 2nd owner http://img.photobucket.com/albums/v3.../SideSmall.jpg The Coupe Group (W111/112 coupes and cabs) official website The Coupe Group on Facebook MotoArigato: Roadworthy News & Humor |
#10
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The 4.5's had the three speed with torque converter.
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#11
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check it hot, its the only accurate way
__________________
Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD 16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace |
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