wrote:
My driveway slopes down towards the garage door. There is a drain pipe
at the bottom that drains into a drain field (not sewer system). During
heavy rains, the drain field will overflow, and flood my one-car
garage.

What can I do to fix this problem, without connecting into the existing
sewer system? I would like to do this without spending a fortune.

Any suggestions?

I assume your garage wasn't built on the lowest point on your
property, correct? If so, run a drain pipe from the garage drain to a
lower point on your property that can safely take lots o' water, and
put a pop-up emitter there with proper seepage provision to prevent
pipe freeze during cold weather:

http://images.google.com/images?hl=en&q=pop+up+emitter

A trench drain at your garage will also give you extra capacity with
easy cleanout and is harder to clog:

http://images.google.com/images?svnu...q=trench+drain