The previous owner of my burban was going to use the truck as a commuter (he is a big guy and needed the room) anyways, while he was dumping money into this thing he had the differential gears changed to 3.08. I use the truck to tow a 26 ft travel trailer and have always had issues on hills. The engine in the truck is the engine that was in the car i used to use to tow the trailer before the tranny went out in that car. I know that the engine was more than capable of pulling that trailer over a mountain pass at the speed limit. In the burban im stuck limping up a hill at 30 mph, sometimes slower, in first gear with the engine bogging. It was suggested to me that the gears in the axles were to blame for my problems so i called Randys Ring and Pinion. They told me that even though the ratio made it seem like it was a lower gear it was actually a higher gear that was prolly installed to save gas (but not to tow). They recomended that i change the gears to 3.73 which is what most trucks come with stock. They tell me that once i get the gears to 3.73 that i should be able to tow with no issues. I have the gears for the rear axle and im picking up a 3.73 front axle this weekend. Does this answer sound right to other people? Im worried that after going through all this work i will still have my problems. The transmission is a turbo 350 with around 50,000 miles on it. The engine is a chev 350 with a #1407 performer series carb and was rebuilt around 10,000 miles ago with a RV cam (at least thats what i asked to be installed). The tires are about 32 inches. The axle thing makes sence to me (kinda) i guess i just need some reassurances.