Scissors jack
Remember a bottle jack weighs 20, 30 lbs or more. Chain it to a secure point where you stow it. in a high speed collision , say 70 mph, once the jeep slows or stops the loose jack will continue on thru the interior of your jeep at the speed you were going. That much metal mass moving at high speed or low can and will KILL YOU....
i'm not a fan of scissor jacks, but they should go plenty high enough to lift a stock jeep. especially with a flat tire. i used it on my jeep when i had 35's on it and it lifted it enough when i was rotating my tires, so no flats. must be an issue with your jack.
Hi-Lift jack is great for lifting out of a hole or as a make-shift winch. It is downright dangerous to use to change a tire.
Don't believe me? Jack up your vehicle at your favorite Hi-Lift jack point until a tire comes off the ground. Give the vehicle a good nudge. Bet it comes right down. Now imagine that when you are trying to change a tire when you are by a freeway and semi's are whizzing past at 80 MPH.
Find a good bottle jack or figure out how to make your stock jack work. 2 cents.
Don't believe me? Jack up your vehicle at your favorite Hi-Lift jack point until a tire comes off the ground. Give the vehicle a good nudge. Bet it comes right down. Now imagine that when you are trying to change a tire when you are by a freeway and semi's are whizzing past at 80 MPH.
Find a good bottle jack or figure out how to make your stock jack work. 2 cents.

http://www.quadratec.com/products/92200_700_07.htm
It stores inside the tray in your cargo area and even holds locking lug keys.
My
anyway.
Clearly you haven't had to change a tire on unstable and soft surface, meaning off-road. Try using your scissor jack and you'll realise you are the nominee for a Darwin award...
But back to the OP's problem - he's obviously not using the points on the axle housing. I'm 35" with Tera 4" and the stock scissor works just fine.
Last edited by bkw; Feb 5, 2011 at 08:29 AM.



. If you are missing those you got more problems than a flat tire.