Upgrade OEM Transmission Cooler

[TheLoveClaw]

Thanks Smoky, I guess worse case scenario if it gets too cold in the winter I can just add a winter grill cover.

 

[Smokymance]

Yes, but, keep in mind you might be blocking airflow to radiator too, even tho not sure how much it would affect it... i had an idea to route the trans cooler down a bit, under the fake denali grill on the lower portion of the bumper, and drill holes to control its air flow.

 

[TheLoveClaw]

Are you running your own synthetic transmission oil or the GM DEXRON VI?

 

[Smokymance]

Stock Dexron replacement when i did the cooler..its due for a flush.

 

[Tiki]

Anyone have the OEM PN for the cooler lines? My NBS had a factory cooler, but my NNBS Tahoe does not

 

[jetmech]

Anyone have the OEM PN for the cooler lines? My NBS had a factory cooler, but my NNBS Tahoe does not

25999420, for 6 speed transmissions

 

[Tiki]

25999420, for 6 speed transmissions

2007 w/4spd

 

[jetmech]

19244188, for the whole kit...cooler and lines, around $90

 

[08grey]

I wanted to do a quick write up for those of us that have the OEM trans cooler on their NNBS.

I wanted to find a solution that utilizes the stock lines and is mostly a bolt in application with little to no modifications needed, and it seems I have achieved that.

Here are the parts you will need:



Only modification needed is to cut out the plastic area in the picture below. This will allow the OEM lines to be pushed lower for better fitment.



Mounting is a little tricky and have to drill some holes in the OEM bracket. I am not finished but this is what I did to get it in until I have time to get something more concrete:



Because there are quite a few more fittings needed to make the connection, the cooler needs to be mounted up a higher than the brackets would allow. Also why I need to cut the extra plastic out of the way to drop the lines down a bit further.

I just used extra washers to create that offset between the bracket and the cooler. I will make some custom brackets at some point but it is pretty rigid right now without the top of the cooler being retained.

So if you dont want to use extra washers for the offset you can not order the Derale bracket kit and make your own. But for 20 bucks its good to get it mounted and running until making something custom.

This Derale worked because the connection spacing is the same as OEM 11". I like that its painted black and is thicker rather than longer. Its 37K BTU so is fairly close to the tru cool 40K max.

Here is finished product, last shot shows from underneath where I had to cut the plastic away for the lines.

I ordered the same setup. Hope to install this week. Thanks for the info.

 

[the blur]

Does the towing package option offer a bigger cooler??? Why not just get a towing package cooler, and GM parts ?