wvumtnbkr said:
So, assuming I have 9 foot tall ceilings, what lift do I want?
How wide is the garage? All lifts other than a scissor are going to involve putting posts on the side of the car. As Ian F says, with a 1 car garage that's a big problem. With a 2 car garage it's less of a problem, but you need to measure out the space. IMHO the way to do this is to look up the specs on the lift you're thinking of, outline it on the floor with tape, and then stack up some boxes to simulate posts and try driving cars in there. Make sure you can open the doors, get in/out, etc with the posts there.
When you say you want to change transmissions, are we talking transverse mount or longitudinal? Transverse mount is restrictive in terms of which lifts will work, you pretty much need a 2-post for that. Longitudinal is much less restrictive.
BTW, if you're working on small cars (Miatas, say), then 9 feet is actually a pretty decent height. I park an FD underneath my Miata using a 4-post with a 9'3" ceiling.
As I see it, they stack up like this:
Standard 2 post: the best overall for service (which is why every repair shop you look at will be mostly 2-posts), but requires the most width (may be too wide to put in a 2-car garage if you want to keep using both bays) and places the highest demands on your concrete. Seems to be one of the least expensive these days
MaxJack: like a regular 2-post but fixes the width problem at the expensive of height. It's narrower overall than most normal 2-posts, and the fact that the posts can be unbolted and wheeled around means that even if it's in the way, it's not permanently in the way.
4 post: By itself it's very limited for service (can't take the wheels off). It's a bit more expensive than the 2-post and requires more front/back room, but less width. You can fit one in a single bay of most 2 car garages and still use the other bay for normal parking. One unique benefit of the 4-post is that you can do alignments with the car in the air.
4 post with rolling bridge jacks: Adds back most of the service options (can do basically everything except dropping subframes), but basically doubles the cost of the 4 post. This is what I have, but I bought it 7 or 8 years ago before prices went nuts.
Scissor: has similar height limits to the maxjack, but totally fixes the width problem. Somewhat limits access to the center of the car, but folks I know who have them don't find that to be a huge issue. Kind of annoying in that you have to drive over it all the time, but if you want to invest in some concrete work you can recess it into the floor to solve that.
QuickJack: not really a lift, think of this as a convenient way to get a car up onto a set of tall-but-really-stable jackstands with minimal effort. Also, unlike all of the other options above, this is portable and you can bring it to the track with you if you want.