My car is an 03 Impreza AWD. In Anchorage, Alaska, the temp is 10 to 20 with lots of snow. I just had my tires rotated and now realize the front wheel drive works but the rear does not. Any suggestions?? Thanks. Kozzi
I have the same car. Mine is automatic. What is yours?
1/ Is the FWD on the dash panel lit up? This will tell you that only the front wheels are engaged without power to the rear wheels. The manual tells you if you have a flat tire in your car, you have to make it into a FWD by inserting a fuse in your fuse box. Check and see if the circuitry isn't shorting out your awd which is making it fwd.
2/ Because the car has open diffs in the front and rear axles, you (or your friend) might see only the front wheels spinning and not the rear wheels. The power is transfered to the wheel with lowest resistance. With the front wheel spinning, one of the rear wheel(s) should also spin. Might not be a solution but maybe you can't see the rear spinning wheel because it's spinning on the other side.
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ask diff reconditioners shop or off road shop if a limited slip diff center is available ( welding diff centers is not an option as it makes the car illegal on the road and dangerous to handle on a good road surface )
you need tall gears that do not loose traction because of the torque advantage from low ratios as in the switch on the dash. so don't use it in tow mode
as for tires there are special snow tires available with spikes in the tread , special tread patterns
( ask a tyre shop for what would be best)
extra weight over the rear end would help with traction
I would think that wide tires would tend to "aqua plane" as they rode up over the snow but talk with a tyre shop again on that
there may be a diff locker available from an off road shop
Consider changing the entire rear end to get the diff operation that would best suit you
I would check the sway bar bushing and links in front. And the traction bars in the rear... Could be front suspension parts, but you usually here a noise at cornering, clicking or popping. Sway bar is a left and right motion at higher speeds. Traction is more unstable at higher speeds.
The answer to your issue most likely lies in the brand of tire. Kumho has very poor tread wear and often handles poorly in slick and snowy conditions. While their dry surface handling is generally good, and they seem quiet, that is about the extent of the plusses for Kumho. Sorry.
the car has part time 4wd. you failed to say, what surfaces you are diving on. dry pavement (or wet) illegal grass,sand,snow,ice, dirt, mud,gravel. (PERFECT) or? why are you driving in 4H in the summer, are you OFFROAD? or in alaska,? state location (state or country) and what is under tires. this car is not AWD, wiki, AWD, AND PART-TIME 4wd the part time has no center differential. that is a very important fact to understand,
The AWD means All Wheel Drive. Sort of the same as a 4 wheel drive. All the wheels have power at the same time. In a slippery road condition, all tires/wheels can loose traction at the same time causing loose of control - which would be normal. AWD does not mean traction all the time in snow and ice. It still has to be driven with caution and respect to road conditions. Hope this helps.
There are a few possibilities, The cheap is if someone was trying to save gas or tow the car, a fuse under the hood on the right side as you are sitting in the car may be installed. There may be a cover with FWD over it. when there is a fuse in here it disengages the rear wheels. The other issue could be the viscous coupling. These are a few hundred $ used and require removing the back cover of the trans to replace.
Vans are typically a challenge to drive in the snow. Try some better tires, get some with some rude tread and a low treadwear rating (under 100 if possible). If you go to a bias-ply traction tire you'll lose a lot of that sideways slipping, but you'll also lose a lot of braking ability under all other conditions than snow so you'll have to keep a slower speed at all times, and they'll wear out fast.. but they still rule in the snow, I got 'em on my old truck right now.