Heavy hauling up/down steep grades

Hello everyone,
I've had my licence for about 4 years now. I'm still pretty new to lowbedding heavy equipment. Just have a few questions that I would greatly appreciate being answered. I've been using a jeep and have had nothing but problems with steering when having heavy loads on like 330 cat excavator or 340 Volvo excavator when keeping jeep slid up. Other drivers have told me to keep the machine towards the back of lowbed to keep the weight from taking away from steering, others have told me to have machine more forward... But either way I've had problems turning on switchbacks and the odd corner. Keeping jeep down just causes me to spin out on hills even though chained right up. My only solution is taking the jeep right off before climbing the hill. But when I do that my lowbed gets caught on fifth wheel ramps when turning sharp, which causes me not being able to steer. Went for a slide down a hill the other day like this and it didn't feel to good, thought I was going into the boonies. Any suggestions or advice would be greatly appreciated. Also when going downhill I should have jeep down at all times right? I have to haul a few 40ton rock trucks this week out of a steep mine road. I always chain right up, 1 steering chain, both drives, and 1 axle on trailer. A little nervous driving down the hwy. Especially since there's been a few accidents lately and 1 fatality to one of the best known drivers in northern bc. Very nerve racking for sure. Just need some guidance and confidence. Thanks in advance.

 

Thanks everyone for the replies!

I have a tandem plus single axle jeep then Tridem lowbed setup with no booster. And when off-road I only lock the interaxle switch. I don't lock the front or back axles.

Um not sure what a jump jeep means sorry.

The jeep I have is connected to tractor fifth wheel which the lowbed then connects to the fifth wheel that's on jeep... Like this