N55 335xi automatic performance radiator.

cburn · 10-02-2014, 09:49 AM

Does anyone know if there are any options for an automatic 335xi n55 performance radiator?

The only option I seem to find is to buy an aux transmission cooler and upgrade the radiator to a performance one that states "Manual only".

I was looking to see what is different about the radiators on the manual and automatic but I was unable to find a decent drawing or picture. Does anyone have details on that?

Thanks,
Cburn

shadow191 · 10-02-2014, 10:14 AM

Autos have a transmission fluid cooler that taps into the radiator. It's the metal block toward the bottom right behind the radiator. It uses radiator fluid to moderate transmission fluid temp. I think the difference between manual and auto radiators is that the manual one has no fittings for the hoses to the tranny cooler.

cburn · 10-02-2014, 10:30 AM

What worries me is will a small aux tranny cooler be enough? I'd hate to upgrade the radiator and throw a small aux cooler on the tranny and find out I have a cool engine but my transmission is constantly overheating.

I wonder how hard it would be to mod a performance radiator to allow the same connections as the stock automatic. I can tig weld aluminum but I don't have any idea if it's even possible.

cburn · 10-05-2014, 11:22 PM

Anyone running After market trans cooler?

shadow191 · 10-06-2014, 08:03 AM

A few people have tried it, but no one has really posted results. And user 135Pats was going to do it, but a reputable shop told him not to since there were issues with fluid pressure dropping after the install. Just pull a search for transmission cooler, there are a lot of threads.

cburn · 10-07-2014, 11:44 AM

I found a few threads. Thanks.

10-02-2014, 09:49 AM	#1
cburn Private 7 Rep 91 Posts Drives: 2011 335I xDrive Join Date: Feb 2014 Location: Waukesha, WI iTrader: (0) Garage List 2011 335XI [0.00]	N55 335xi automatic performance radiator. Does anyone know if there are any options for an automatic 335xi n55 performance radiator? The only option I seem to find is to buy an aux transmission cooler and upgrade the radiator to a performance one that states "Manual only". I was looking to see what is different about the radiators on the manual and automatic but I was unable to find a decent drawing or picture. Does anyone have details on that? Thanks, Cburn
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10-02-2014, 10:14 AM	#2
shadow191 Lieutenant Colonel 181 Rep 1,681 Posts Drives: 2017 Volvo XC90 R-Design Join Date: Dec 2012 Location: GA iTrader: (3)	Autos have a transmission fluid cooler that taps into the radiator. It's the metal block toward the bottom right behind the radiator. It uses radiator fluid to moderate transmission fluid temp. I think the difference between manual and auto radiators is that the manual one has no fittings for the hoses to the tranny cooler.
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10-02-2014, 10:30 AM	#3
cburn Private 7 Rep 91 Posts Drives: 2011 335I xDrive Join Date: Feb 2014 Location: Waukesha, WI iTrader: (0) Garage List 2011 335XI [0.00]	What worries me is will a small aux tranny cooler be enough? I'd hate to upgrade the radiator and throw a small aux cooler on the tranny and find out I have a cool engine but my transmission is constantly overheating. I wonder how hard it would be to mod a performance radiator to allow the same connections as the stock automatic. I can tig weld aluminum but I don't have any idea if it's even possible.
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10-05-2014, 11:22 PM	#4
cburn Private 7 Rep 91 Posts Drives: 2011 335I xDrive Join Date: Feb 2014 Location: Waukesha, WI iTrader: (0) Garage List 2011 335XI [0.00]	Anyone running After market trans cooler?
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10-06-2014, 08:03 AM	#5
shadow191 Lieutenant Colonel 181 Rep 1,681 Posts Drives: 2017 Volvo XC90 R-Design Join Date: Dec 2012 Location: GA iTrader: (3)	A few people have tried it, but no one has really posted results. And user 135Pats was going to do it, but a reputable shop told him not to since there were issues with fluid pressure dropping after the install. Just pull a search for transmission cooler, there are a lot of threads.
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10-07-2014, 11:44 AM	#6
cburn Private 7 Rep 91 Posts Drives: 2011 335I xDrive Join Date: Feb 2014 Location: Waukesha, WI iTrader: (0) Garage List 2011 335XI [0.00]	I found a few threads. Thanks.
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