rev up your engines today I'm gonna talk about you you buy an all wheel drive
vehicle or not now on an insane vehicle like this g500 there are all kinds of
control for all wheel drive and it even has a differential lock and it says
never use on paved roads you're only supposed to use that when you're off
road going slow high range these things are very complex the newer ones are even
more electronically controlled do you really want one of these systems do you
really need one of these systems no yes they handle better especially on the ice
and snow in 1980 the first real big one for performance was the Audi Quattro on
a track with snow and shows you could go 100 miles an hour in the snow in one of
these it was all wheel drive all the wheels are driving all the time and it
was great in the ice and snow at high speeds but let's face it should you
really be driving the hundred miles an hour in the snow but for most people
front-wheel drive like this old Celica is perfectly fine it's more efficient to
pull than it is to push push they fishtail a lot more so front-wheel drive
for most people is perfectly adequate plus front wheel drive has a big
advantage they weigh less they get better gas mileage and you don't have to
have that giant drivetrain that can go bad going to the back and expensive rear
differential losing power going to the rear wheels they're more efficient the
added weight all-wheel drive vehicle gonna get worse gas mileage because it weighs
more has to pull itself plus there's more friction they're gonna have less
gas mileage because they have realized the more spinning weight you have on a
vehicle the less efficient that's going to be that's why the front-wheel drive
there's less friction they're more efficient not a classic part-time
all-wheel drive is like the old trucks or now with jump you get a fourth truck
and you could have it rear-wheel drive and you could set the lockers on the
front so that it was all-wheel drive in the front and then you'd stop
and you'd set them off that's kind of an old style so on those you could select
to go just rear-wheel drive or rear wheel and front-wheel drive
we're full time all-wheel drive is you've always got all the wheels driven
all the time now they can get very complex where they can change what
percentage is the front drive what percentage is the rear that gets into
really complicated electronic hydraulic systems that some of these modern cars
have but the modern all-wheel drive systems they're all wheel drive all the
time you can't turn it off now they're only made for driving all
the time they don't have a selection like this Mercedes has where you can go
into low range or high range it's always in the high range you can switch it low
high you can also switch a bunch of other stuff too but this is the more
luxurious system with a pure all-wheel drive system its main advantages you get
better handling in the rain and the snow because it works at all different speeds
like I say the first real big commercial success was the Audi Quattro where they
were racing around in a snow at 100 miles an hour it has much better
handling capabilities if you live on a mountainside or where it rains all the
time like Seattle then you can be a more aggressive driver because all four
wheels are pulling it and you won't get slippage of two are driving and two are just
riding but as I said previously that has to wait lower gas mileage and for you
true aficionados you can't do burnouts because all the wheels are driving there
they don't do burnouts the selectable all-wheel drive the kind like you can
shift on the fly you can be going and two-wheel drive and you want to shift it
the four-wheel drive or your wheel driving you want to shift it into
two-wheel drive you're adding weight you're gonna get worse gas mileage the
vehicles cost a lot more and there's more maintenance involved as I'm going
to show you on this g-wagen tour will be parts for things to go wrong in the
cases these you gotta check grease it up every once in a while
you turn the wheel as far as it goes then you go inside here and see the big hub there
is a big hub and you can see there's grease
around it it has to be greased every once in a while many guys forget to do
this and they have serious problems down the line so here's how you do this
particular one you get a fourteen millimeter hex socket and you put it on
the plug because right on the drain plug right here there it is you're gonna put
a ratchet on and try to loosen it up keep going and eventually you'll get it
off and now we gotta fill that all with grease until it comes out the top it
might take a lot you want some good multi-purpose grease and just keep
pumping it till it comes out the hole you just pump and plump and the other end
as you can see it goes in the hole we pump it till it comes back out
the hole now as you can see I've been pumping and pumping and no grease is
coming out we're probably gonna have to get another cartridge well that one's
empty so now we got to put another cartridge in it takes a lot of grease in
these things this has probably not been checked in years so we screw the new end in
we release the back push it in it start pumping
more grease and as you can see nobody's done this in a long time I think this
thing's bone-dry but finally grease is coming out of the
hole and it's full alright now I can put the plug back in to do the other side
there's two sides now to do the other side we just start it up you turn the
wheel the other way and we're doing the same process get the
ratchet sticking on oh man Oh pull like mad til it start then it gets easier you
can see now it's getting a lot easier yes there's a pump just pump it in till
it comes out of the hole just like the others I will see how low this one was
and as you can see the grease is starting to coming out of the hole so this
side is full it took two now the customer just bought this thing so it's new to me
previous owners obviously did not maintain it well which doesn't bode well
for him let's take it for a ride and hope that it quieted down quite a bit
mister I don't see what happens well the noise has mainly gone away when we go
straight but when we turn we can still hear it listen when we turn
you can't have that a little bit of ticket and I'll take the next one a
little faster because there's no pedestrians here your people out of the
way they're always in the way when you're road testing
now it's quieting down going straight it was really bad before but due to poor
maintenance by the previous owners these joints are now worn now he's gonna drive
it a while and see what happens if the noise doesn't go away then he's gonna have to
have this front rebuilt and that's gonna cost a small fortune that's why I warn
people about all-wheel drive vehicles you have to maintain them correctly and
if you don't they cost a fortune let's say this had been a normal car like a
Toyota and you let the CV axle boot rips and the grease came out I can buy a
whole brand new axle assembly for like 59 bucks this thing you're talking
thousands of thousands of thousands you're gonna get an all wheel drive
vehicle you want to make sure you maintain and also realize if you're
buying a modern full-time all-wheel drive vehicle when the tires were you
have to replace all four of not wants if you don't and they're not all exactly
the same it will mess with the differentials trying to make all the
wheels spin at the same speed can even ruin your transmission they're more
expensive if you don't want the expense don't buy all-wheel drive feel like I do
where I got elect on a winner rent one I don't need a mare in Houston but I sure
need him there last time I went there they had 300 something inches of snow in
a month so now you know a little bit more about the truth behind all-wheel
drive vehicles so you could make a wise decision whether you're gonna buy one or
not and here's some bonus questions and answers
surely knows better says I got a 2011 GMC Sierra v8 a transmission a leak
I got it fixed but now it clunks and has a bunch of codes like po796 and po842
it's really undrivable I can tell you it's probably happen cuz it's seen a
million times in those you had a leak and you got it fixed probably you drove
it too long was it low on fluid damages the inside of the transmission I got a
customer over the same exact vehicle and it turns out one of the transmission
cooler lines was leaking and by the time they got it to me and now the thing
holds like I don't know 13 quarts of transmission fluid there's like two left
in it I fixed the leak and filled it up with fluid
clunked like mad didn't shift worth beans and I told him the
transmission is done when it's worn like that because there
was no fluid there's so much damage I said if I were you I wouldn't even
rebuild it I would just buy a remanufactured unit so that's what they
did I sent them to the transmission shop that I use and they got him a nice
remanufactured one and it worked perfectly fine then because when it's
that far gone it's not worth rebuilding yourself or having a mechanic do it
because there's too much internal damage the same thing with your engine if you
run an engine without coolant and it overheats there's so much damage done
that really don't try to fix that engine they rebuilt and you give them the old
one back that they can attempt to rebuild and you some of the parts for it
a lot of times even when you do that then they will charge your core charge
because when you send them your old engine they'll look at it and say no the
car is no good it's completely destroyed so you'd only got to pay the core
charge too but that's why you wouldn't want to fix the transmission that ran
out of fluid there's probably so much damage inside it that it wouldn't be
worth fixing to just get a remanufactured unit and stick it in, so if you never want
to miss another one of my new car repair videos, remember to ring that Bell