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#1
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Tranmission Cooler Replacement Question
i have a 2009 528i with a hole in the transmission cooler attached to this radiator. i'm planning on changing it this weekend. my question is do i need to add transmission fluid to the transmission after i replaced the cooler? RealOEM.com - Online BMW Parts Catalog thanks, |
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#2
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Quote:
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Current garage: '03 4.6is Proud X5 Peasant '93 Jeep Cherokee (XJ) '07 Jeep Liberty (KJ) '88 Jeep Comanche (MJ) |
#3
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I agree with smokeyyank, already having a hole and removing and replacing the t-cooler will definitely put you down enough fluid to potentially cause wonkie shifting issues for sure - I would definitely make sure that is topped off.
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#4
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Where is the hole exactly?
I had a hole in the core of my trans cooler on the 3.0i where ATF was leaking into the cooling system. A routine coolant check showed mayo under the reservoir cap. I thought I blew the headgasket or cracked the head but a last ditch check on the ATF cooler via pressure test showed the leak and we started there, lucky it solved it in my case. If there is crossing over I would change out the coolant and the ATF. Water contamination of the trans fluid has the potential to kill your tranny. Mercedes comes to mind with the W203 C and W211 E's having ATF contamination via the radiator oil cooler that has killed a lot of transmissions. When I replaced my cooler I replaced coolant and ATF to be safe.
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04 X5 3.0i auto 03 X5 4.6is |
#5
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Oh, and IIRC the only way to know if you need to add ATF is to open the fill plug and check ATF level there at a certain temp. Anything other than that would be guessing.
Also, I think the trans coolers have o-ring seals that would be a good idea to replace at the same time.
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04 X5 3.0i auto 03 X5 4.6is |
#6
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Yep, on the X they call them "X-Rings"(2 each needed)
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'04 E53 3.0i 189K+ miles |
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