Questions tagged [4wd]

A vehicle drivetrain that can apply power to all four wheels/tires. This capability is "on demand" and is switched on/off by the operator. This tag is differentiated from the AWD tag for this reason. This option is usually found in trucks and SUVs, but may be found in cars on a more limited basis.

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10
votes
9answers
78k views

Will different tread depths hurt my 4 wheel drive?

I have a Ford F150 4x4. The front 2 tires treads measure 12/32, one rear is 6/32 and the other is 10/32. The dealership told me I should replace the rear 2 tires because the big difference in tread ...
31
votes
3answers
14k views

Difference between FWD/RWD/4WD/Part-Time 4WD/AWD?

I'm curious as to what are the particular difference between the various drive systems available in modern vehicles. FWD and RWD are pretty straightforward - Front Wheel Drive cars put the power to ...
16
votes
2answers
10k views

What happens to a car when it hasn't been driven for 12 years?

I'm hoping that I'll soon be the owner of 2l turbo charged, 4wd hatchback that's been sat in a garage, undriven for over a decade. Trouble is that I won't be able to give it a full inspection until I ...
8
votes
2answers
12k views

Sidewall of my tire has a tear, can this be repaired?

I have a Subaru Legacy 5.0i wagon, which has all-wheel drive. Taking a right turn yesterday, my rear passenger tire bumped on a curb. About 20 minutes later the tire was flat. There is an 'L' ...
24
votes
3answers
17k views

Why do pickups and large SUV's use 4x4 and generally not AWD?

In almost every case I can think of, the larger vehicles with four wheel power are 4x4, and the smaller ones AWD. As far as my experience goes, AWD is much more convenient, and also works at least as ...
2
votes
0answers
308 views

BMW e83/2008 X3 rear wheels skidding at low speed turns

After replacing worn gear in transfer case actuator servo motor, I noticed that rear wheels appear to be skidding on dry surface when I try to brake or accelerate at low speeds with steering wheel ...
3
votes
2answers
673 views

Why does using the low range of a 4WD transmission give better acceleration?

If I my 2007 Forester transmission into its low range, which has a ratio of 1.6 I think, it will accelerate faster (eg. From 0 to 100 km / h). Why is this? below is a picture.
1
vote
1answer
94 views

Periodic rustling noise every 6.5m

Driving a 2005 Hilux (KUN26 frame, manual diesel), I recently started hearing a soft rustling periodic noise seemingly coming from the front-left side (could be the wheel/tire). It feels like as if ...
0
votes
1answer
176 views

All-Wheel Drive/ 4WD system

Time has come to clear things out... I would like to know the difference between a center differential and a transfer case. I know that a transfer case engages the front axle with the rear axle in 4H ...