I am trying to find out the towing capacity of a 2009 turbo diesel Nissan patrol. I have been told that being an auto reduces this.

you make little sense in your statement
define clearly -- lightened in 1994black rocker cover has it weakened what do you mean with this
also It probably should have had a turbo originally
talk with nissan about that but you can fit the turbo to the engine provided that it is of the recommended capacity for that engine

turbo retailers will be able to help you with the correct unit to fit

According to the National Roads and Motorists Association, it says it can tow up to 750 kg when it was new without brakes on load. Maybe a little more with brakes on trailer. I assume it is in very good condition. It can be a bit of a gas guzzler especially with a load.

what is the load capacity and towing together? look at the id plate on the door jam

not sure what year model it changed over but it either unscrews from the filter housing(and the water sensor in the bottom of it),or you undo a cover and it is in a canister

I have attached a website on for a 2003 Nissan Patrol Diesel engine as the file is to large to send> it has pictures and directions>Good Luck>> http://ictehe602.blogspot.com/2008/05/my-car-nissan-patrol-grx-30-turbo.html

You can find the specs at http://www.nissan.com.au/webpages/support_templates/grade_comparator/Spec_sheets/Patrol%20Wagon%20A4%20Specs%20FEB%2009.pdf

2009 NISSAN NAVARA RX D40 DUAL CAB P/UP 5 SEATS, 4X4, DIESEL TURBO F/INJ, 5 SP AUTOMATIC
» Release Date: Jan-2005
» Max. Torque: 403Nm @ 2000rpm
» Max. Power: 128kW @ 4000rpm
» Power to Weight Ratio: 15.08:1 kW/kg
» Fuel Type: DIESEL
» Fuel Consumption: City(10.5L/100km)
» Dimensions: L(5220mm), H(1895mm), W(1774mm)
» Towing Capacity: Brake(3000kg), Unbrake(750kg)
» Turning Circle: 13.3m

as you can see you can tow us to 3000kg or 6600 lbs IF the trailer has its own brakes and 750 kg is it doesn't.

Uhaul will not rent you a trailer to haul anything close to what the maximum towing rate your vehicle is listed at.