Tire Jack On Board?

[Rich W]

Originally Posted by Goal15

Tundra comes with the screw bottle jack.... which I have been able to use very successfully on the Airstream to change tires on a couple of occasions.

Same in my 4Runner, they are excellent jacks and I think they are for up to 3 ton. They are expensive to replace. I think they are around $100 but that's Toyota's price. I can't find one anywhere else.

The bottle and screw bottle are similar but one is hydraulic and the other mechanical. Never have to worry about losing fluid in a screw bottle, an excellent advantage They also are short but extend up pretty high. I've used it on my boat trailer a couple of times, never on the AS though.

[NevadaGeo]

Originally Posted by richw46

I would never get under a vehicle on just a jack. I always use jack stands and then I put a concrete block under a cross member before I get under it. I was stationed at Fort Benning, GA when a Sargent, just back from his 3rd tour of Vietnam, got crushed when his car slipped off the jack; lesson learned.

Now I gotta chime in; Unless that CMU, or concrete masonry unit, or cinder block, or what ever name it is called in your woods; is filled with concrete or grout, it is almost as fragile as setting on a cardboard box. Strike the side strongly with a hammer and it will crack, break, shatter. The strength in masonry walls comes from filling the inside cells with grout; which is concrete with small pea gravel size aggregate. This makes a solid wall of concrete. Deceptive strength if you're standing straight on the top, drop a weight on the side and it will break, easily. Fill that CMU before you get under

[J. Morgan]

Putting the tires and wheels under the vehicle is a common safety backup for a vehicle up on jack stands.

It could save your bacon.

[Rich W]

Originally Posted by NevadaGeo

Now I gotta chime in; Unless that CMU, or concrete masonry unit, or cinder block, or what ever name it is called in your woods; is filled with concrete or grout, it is almost as fragile as setting on a cardboard box. Strike the side strongly with a hammer and it will crack, break, shatter. The strength in masonry walls comes from filling the inside cells with grout; which is concrete with small pea gravel size aggregate. This makes a solid wall of concrete. Deceptive strength if you're standing straight on the top, drop a weight on the side and it will break, easily. Fill that CMU before you get under

Well, like I said, the car is on jack stands and the concrete block is on its back with the sides vertical, not on its side. It's also right under a cross member so there's no room for the car to drop any further. I have used a block to support the car weight while I shift the jack stands. I know that these blocks can break but you have to strike them, drop them or have something fall on them. They are a secondary backup for me. But thank you for your concern.