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I have a 1999 Frontier 4x4 that is carrying a Lance hard sided camper - about 1500 LBS. I have added a leaf to the cluster so it rides high enough now, but I am wondering about the bearings in the rear. How quickly will I kill them carrying this much weight full time? (Btw, my 3.3 6 cyl. seems to handle the load with no problem).
 

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Welcome to the club. I have owned a 96 and now my 06. I too have wildly overloaded both trucks. but not full time like yours. I was going to recommend that you step up to a gen2 but depending on models the load capacity is about the same. THe load from the camper does get distributed to the front too.
 

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You should probably look for an exploded diagram of the rear axle to see how the axle tube bearings are set up. They just about always have a bearing race in the housing, but some axles use the axle itself as the bearing surface, while others use a race. If it rides directly on the axle you may want to do much more frequent fluid changes and check it from time to time.

Also as an FYI, my '15 has a payload capacity of only about 1100lb, you're very likely way over what the truck is considered rated for. I occasionally way overloaded my Hardbodies over the years (1600lb worth of canned sodas for a sci-fi convention on my '89 comes to mind) but not full-time. The extra leaf might well address suspension issues, but I believe that you still have a fairly thin C-channel frame not much different from the one that my older trucks had. It really might not be up to the task for the long term, or if you're in a fender-bender or some other reasonably common stressor, the frame may give way.

Because the Hardbody was sold on the International market as Nissan's go-to truck they did have a heavy-duty version, one variant was sold as a regular cab with an eight foot bed, another was a cab-and-chassis with dually rear wheels. I believe both were considered one-ton trucks, but they might not even have gone as far as king-cab models, let alone made it from the D21 chassis to the D22 chassis.
 

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Fair questions:
Are there legal ramifications if loaded beyond the manufacturer's payload/cargo rating?
What is your insurance company's policy if overloaded coupled w/ the unforeseen?
 

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Yeah man, you are probably significantly above your GVWR. Your payload on the 4x4 1999 is probably somewhere around 1200 lbs, maybe a little more if it isn’t a kingcab/crewcab type version, and thats counting everything, not just whats in the truck bed. Adding a leaf will help it ride better for a while, but it doesn’t change the weight rating that the vehicle is rated for.

I looked at truck bed campers for a while but could never find one that was light enough for our payloads when you factor in supplies, people, exc.
 

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Fair questions:
Are there legal ramifications if loaded beyond the manufacturer's payload/cargo rating?
What is your insurance company's policy if overloaded coupled w/ the unforeseen?
It seems reasonable to think that if you are driving an overloaded vehicle and were to injure someone that they would be successful in civil court. Not sure that cops would really care or think of it at the initial scene, and regarding insurance they would probably care if they found out and it was a factor in the accident, but more than likely though they wouldn’t really become aware of it.
 

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It seems reasonable to think that if you are driving an overloaded vehicle and were to injure someone that they would be successful in civil court. Not sure that cops would really care or think of it at the initial scene, and regarding insurance they would probably care if they found out and it was a factor in the accident, but more than likely though they wouldn’t really become aware of it.
For a simple fender-bender you're probably right, no one would bother to look into it. If an accident is more serious though, and if the police take pictures, then you bet that an insurance company, possibly both insurance companies, are going to look into it. Even if the other driver is at-fault their insurance company might try to argue that the over-GVWR vehicle contributed to the accident and is partially at-fault because the driver could not maneuver to avoid it. The owner of the overweight vehicle might not be compensated by the at-fault driver's insurance, and their own insurance might also choose to deny the claim.
 
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