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Trans cooler ahead of radiator or after? #1236715 05/20/12 11:21 PM 05/20/12 11:21 PM
Joined: Feb 2005 Posts: 766 Midwest F fuseable OP super stock
fuseable OP super stock F Joined: Feb 2005 Posts: 766 Midwest	Should a auxiliary transmission cooler be plumbed before or after the radiator, that is the ? Thanks Joe

Re: Trans cooler ahead of radiator or after? [Re: fuseable] #1236716 05/20/12 11:24 PM 05/20/12 11:24 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	Its usually best after. The cooler in the bottom radiator tank gets some heat out first. The added cooler gets more out with ambient air. Its a 2 stage setup.

Re: Trans cooler ahead of radiator or after? [Re: fuseable] #1236717 05/21/12 06:06 AM 05/21/12 06:06 AM
Joined: May 2008 Posts: 5,399 Aurora, Colorado 451Mopar master
451Mopar master Joined: May 2008 Posts: 5,399 Aurora, Colorado	I run the trans cooler first than the radiator. More consistent trans temps in cold weather, and the radiator does not have to work as hard cooling the engine in hot weather. Running radiator first, your more likely to have engine overheating problems.

Re: Trans cooler ahead of radiator or after? [Re: 451Mopar] #1236718 05/21/12 08:14 AM 05/21/12 08:14 AM
Joined: Jul 2005 Posts: 636 Graz, Austria DGS mopar
DGS mopar Joined: Jul 2005 Posts: 636 Graz, Austria	on the other hand when the water temp is up it will heat the tranny fluid if the cooler is before the radiator... I recently got a transmission cooler with a thermostat that I plan on mounting after the radiator. The thermostat only opens when the tranny fluid reaches a certain temp so no worries about too cool fluid.

Re: Trans cooler ahead of radiator or after? [Re: DGS] #1236719 05/21/12 09:30 AM 05/21/12 09:30 AM
Joined: Feb 2003 Posts: 8,671 A Andrewh master
Andrewh master A Joined: Feb 2003 Posts: 8,671	there are actually 3 schools of thought on this. first 2 mentioned. before, so the rad will maintain a more consitant trans fluid temp. after to cool a bit more than the rad can, as lower temps equal longer life. third is to bypass the internal rad cooler all together. A couple of aftermarket transmission companies recommend this option because of 1. the transmission can never cool further than your radiator temp using that internal cooler vs the external cooler that can go to ambient. plus concerns for gunk in the cooler and some radiators are know for leakage. I was always taught to do the first one. but after reading a few articles like that I will always get a bigger aux cooler and leave the radiator one out of the loop.

Re: Trans cooler ahead of radiator or after? [Re: DGS] #1236720 05/21/12 11:26 AM 05/21/12 11:26 AM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger master
540challenger master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: on the other hand when the water temp is up it will heat the tranny fluid if the cooler is before the radiator... I recently got a transmission cooler with a thermostat that I plan on mounting after the radiator. The thermostat only opens when the tranny fluid reaches a certain temp so no worries about too cool fluid. Wouldn't that cut off the fluid flow when t-stat is shut???

Re: Trans cooler ahead of radiator or after? [Re: 540challenger] #1236721 05/21/12 11:55 AM 05/21/12 11:55 AM
Joined: Jul 2005 Posts: 636 Graz, Austria DGS mopar
DGS mopar Joined: Jul 2005 Posts: 636 Graz, Austria	Quote: Quote: on the other hand when the water temp is up it will heat the tranny fluid if the cooler is before the radiator... I recently got a transmission cooler with a thermostat that I plan on mounting after the radiator. The thermostat only opens when the tranny fluid reaches a certain temp so no worries about too cool fluid. Wouldn't that cut off the fluid flow when t-stat is shut??? No, as the thermostat has an internal bypass. It acts as a short piece of pipe when it's closed. when it opens the internal bypass is closed and the fluid has to go through the transcooler. I'm going to use a Mercedes A-class transmission cooler. here's a pic:

Re: Trans cooler ahead of radiator or after? [Re: DGS] #1236722 05/21/12 12:47 PM 05/21/12 12:47 PM
Joined: Apr 2007 Posts: 2,826 NY usa 5 540challenger master
540challenger master 5 Joined: Apr 2007 Posts: 2,826 NY usa	Quote: Quote: Quote: on the other hand when the water temp is up it will heat the tranny fluid if the cooler is before the radiator... I recently got a transmission cooler with a thermostat that I plan on mounting after the radiator. The thermostat only opens when the tranny fluid reaches a certain temp so no worries about too cool fluid. Wouldn't that cut off the fluid flow when t-stat is shut??? No, as the thermostat has an internal bypass. It acts as a short piece of pipe when it's closed. when it opens the internal bypass is closed and the fluid has to go through the transcooler. I'm going to use a Mercedes A-class transmission cooler. here's a pic: Now that is a cool piece. Do you have a part number for that cooler??

Re: Trans cooler ahead of radiator or after? [Re: 540challenger] #1236723 05/21/12 03:37 PM 05/21/12 03:37 PM
Joined: Jul 2005 Posts: 636 Graz, Austria DGS mopar
DGS mopar Joined: Jul 2005 Posts: 636 Graz, Austria	I sure do - here it is: (A) 169 500 06 00 I accidently put up the picture of the newer cooler style. my cooler has part numer (A) 169 500 04 00 (or A 169 500 02 00). here's how mine looks like (a bit different than the one before):

Re: Trans cooler ahead of radiator or after? [Re: DGS] #1236724 05/21/12 05:48 PM 05/21/12 05:48 PM
Joined: Oct 2007 Posts: 3,884 Oregon hooziewhatsit master
hooziewhatsit master Joined: Oct 2007 Posts: 3,884 Oregon	How wide are the mounting points? If you ever find yourself in a fair fight, your tactics suck.

Re: Trans cooler ahead of radiator or after? [Re: hooziewhatsit] #1236725 05/21/12 05:57 PM 05/21/12 05:57 PM
Joined: Jul 2005 Posts: 636 Graz, Austria DGS mopar
DGS mopar Joined: Jul 2005 Posts: 636 Graz, Austria	I would have to measure but the cooler should fit nicely in front of the radiator. if you line up one hole on the left(in the picture it's the lower one but the cooler is upside down) with a bolt hole in the radiator support the hole on the opposite (right) side almost lines up with another hole in the radiator support. I just need to weld a short piece of metal to the mounting tab with the rectangularhole and I can fit this cooler without drilling any new holes in the radiator support

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