Not knowing the answer for sure but trying to look at logically. I would think that vehicles used for towing, exercise the steering system to extremes while backing trailers. While going down the road it may not be so bad. Both of my Dodge Cummins Diesel trucks (ordered with full tow packages) have extra coolers for everything. It wouldn't surprise me if the lug nuts had cooling fins on them. :-) -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Kenyon Wills Sent: Friday, January 12, 2007 1:46 PM To: mailing-list@xxxxxxxxxxxxxxxx Subject: IML: Power Steering Cooler source What causes the steering fluid to overheat? Friction in the fluid as it does its work? There aren't friction plates like in a transmission, and I'm not seeing what would cause this. What would cause conditions to change that would make it heat up more on a tow vehicle? Load on the front wheels inducing more strain to pivot them? --- About coolers: I have 40 of them hanging on a rafter. They came from Imperials, so presumably take no modifiaction. They are a non-wear item as they are just a finned cooler with hoses. I can media blast, solvent tank, or leave covered in vintage funk at your preference. Contact me off-list about that. Kenyon Wills __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm