I checked eBay for the OEM scissor Jack, $90+!
Where is a good/safe place under the suspension to lift the truck with a bottle jack? Is the control arm steel or aluminum? How about this bottle jack and stand combo with 18-3/8" lift: https://www.amazon.c...ottle+jack&th=1
I have put the floor jack, OEM scissor jack and jack stands under the Tactical Rover rock slider, is that a safe place to lift the truck? If I get a Hi-Lift jack, can I lift the truck using the nerf bars? Is that safe to use on a regular/non-emergency basis?
Yes, the sliders are plenty strong to lift the truck by. I often lift mine by them. In fact, my LR3 is sitting about 5' in the air currently on my lift supported on the sliders. I do try to place the lift pads directly under the main mounting bolts or frame where possible to help distribute the load.
The control arms are steel and can be good lifting points if you can find a flat spot to lift from. That's the hardest part. And if using a bottle jack it can be hard to find one short enough to fit under the control arm if you have a flat tire.
A hi-lift can pick the truck up high enough to change a tire by lifting on the nerf bar of the sliders, but it's not a very good option if you have other choices. It still makes you lift the truck quite high as you are lifting through the suspension travel before the tire comes off the ground. And a hi-lift jack is inherently unstable (by design actually). A very useful and versatile tool on the trail but not something I use for maintenance or around the shop.
I definitely would not spend $90 for a factory scissors jack! They are nothing special; pretty poor actually. There are tons of options for the same thing at far lower prices:
A basic bottle jack is cheap and fairly safe, but likely won't have enough lift to pick a wheel off the ground unless you can get it under the suspension. The one you linked with a built-in jack stand is nice, but the problem with it is how tall it is full collapsed. It definitely won't go under the suspension! It's also too bulky to carry in the truck daily.
The OEM RRC/D1 (D2?) bottle jacks are great - they are double-acting so they have more lift than a normal bottle jack. they're also somewhat hard to find in working condition.
I don't know if you have a garage or are in an apartment. If you have a garage and place to store it, a floor jack like I linked in my earlier post is the preferred method of lifting, followed by placing a jack stand under the vehicle once it's in the air. For a trail tool, I'd consider a hi-lift since it can do many things. But for just a daily 'in case of flat tire' jack, I'd probably either get a small bottle jack or another scissors jack since they can be stored in the stock location, are cheap, and can do the job.
In my personal Rovers I only have hi-lifts. These are not daily drivers and I'm comfortable using the high lift (with a strap around the axle) to change a tire if I need, even on the side of the road. But I certainly wouldn't expect Michele to be able to do that and I don't know if you'd want your wife using a hi-lift - for that matter if you haven't used one before I'd recommend you do some research on how to use it before trying. It's easy to damage the truck or hurt yourself if you're not careful. There are tons of youtube videos on using one but if you'd like I can run though it with you at the next MORG. We can actually lift your LR4 with one so you can see the pros and cons. We can also look at other good lifting options using your specific truck. There are lots of ways to skin this particular cat.
I'd offer to take some pictures of mine, but it's stuck on the lift in the shop for at least a week waiting on some new parts.