1998 PONTIAC FIREBIRD rear axle

Limited-Slip Rear Axle
If you have this feature, your limited-slip rear axle can
give you additional traction on snow, mud, ice,
sand or
gravel. It works like a standard axle most
of the time,
but when one of the rear wheels has
no traction and the
other does,
this feature will allow the wheel with
traction to move the vehicle.
Parking Brake
To release the parking brake, hold the brake pedal down.
Pull the parking brake lever up until you can push in the
release button. Hold the release button
in as you move
the brake lever all the way
down.
To set the parking brake, hold the brake pedal down and
pull up on the parking brake lever. If the ignition is on,
the brake system warning light
will come on.
NOTICE: I
~~ ~
Driving with the parking brake on can cause
your rear brakes to overheat.
You may have to
replace them, and
you could also damage other
parts
of your vehicle.
2-44

Loading Your Vehicle
TIRE- LOADING INFORMATION
OCCUPANTS VEHICLE CAf
yv 1, nDD 28KPA(4LBS)
'q s Manual for tire pressure needed at
l~lH(100 mph) or higher speeds, where legal, and for additional tire information
Two labels on your vehicle show how much weight it
may properly
carry. The Tire-Loading Information label
found on the rear edge of driver's door tells you the
proper size, speed rating and recommended inflation
pressures for the tires
on your vehicle. It also gives you
important information about the number
of people that
can be in your vehicle and the total weight that you
can
carry. This weight is called the vehicle capacity weight
and includes the weight
of all occupants, cargo, and all
nonfactory-installed options.
MFD BY GENERAL MOTORS CORP
DATE GWR GAM FRT
!a
THIS VEHICLE CONFORMS TO ALL
VEHICLE
SAFm BUMPER,QPT
EFFECT ON THE b~ WN ABOVE.
4% CAR
The other label is the Certification label, found on the
rear edge
of the driver's door. It tells you the gross
weight capacity
of your vehicle, called GVWR (Gross
Vehicle Weight Rating). The GVWR includes the weight
of the vehicle, all occupants, fuel and cargo. Never
exceed the
GVWR for your vehicle, or the Gross Axle
Weight Rating
(GAWR) for either the front or rear axle.
And,
if you do have a heavy load, you should spread it
out. Don't carry more than
100 lbs. (45 kg) in your
rear area.

Towing a Trailer
A CAUTION:
F-
If you don’t use the correct equipment and drive
properly, you can lose control when you
pull a
trailer. For example, if the trailer is too heavy, the
brakes may not work well
-- or even at all. You
and your passengers could be seriously injured.
You may also damage your vehicle; the resulting
repairs would not be covered
by your warranty.
Pull a trailer
only if you have followed all the
steps in this section.
Ask your dealer for advice
and information about towing a trailer with
your vehicle.
Your vehicle can tow a trailer if it is equipped with the
proper trailer towing equipment. To identify what the
vehicle trailering capacity
is for your vehicle, you
should read the information in “Weight of the Trailer”
that appears later
in this section. But trailering is
different than just driving your vehicle by itself.
Trailering means changes in handling, durability and
fuel economy. Successful, safe trailering takes correct
equipment, and it has to be used properly.
That’s the reason for
this part. In it are many
time-tested, important trailering tips and
safety rules.
Many
of these are important for your safety and that of
your passengers. So please read this section carefully
before
you pull a trailer.
Load-pulling components such
as the engine,
transmission, rear axle, wheel assemblies
and tires are
forced to work harder against the drag
of the added
weight.
The engine is required to operate at relatively
higher speeds and under greater loads, generating extra
heat. What’s more,
the trailer adds considerably to wind
resistance, increasing the pulling requirements.
4-32 ..

Attach T-hook chains in front of rear wheels in bottom
of frame rail on both sides.
Attach a separate safety chain around each outboard end
of the
rear axle.
NOTICE:
We care not to damage the brake pipes and cables.
5- 14

Compact Spare Tire
Although the compact spare tire was fully inflated when
your vehicle was new, it can lose air after a time. Check
the inflation pressure regularly. It should be 60 psi
(420 kPa).
After installing the compact spare on your vehicle, you
should stop
as soon as possible and make sure your spare
tire is correctly inflated. The compact spare is made to
perfom well at speeds up
to 65 mph (105 km/h) for
distances
up to 3,000 miles (5 OOO km), so you can finish
your trip and have your full-size tire repaired or replaced
where you want. (When the compact spare is used on the
rear axle, see Notice following.) Of course, it’s best to
replace
your spare with a full-size tire as soon as you can.
Your spare will last longer and be in good shape in case
you need it again.
NOTICE:
If the compact spare is used as a rear tire, do not
drive faster than
50 mph (80 M). Damage to
the rear axle may occur if the compact spare is
driven faster than
50 mph (80 km/h).
NOTICE:
When the compact spare is installed, don’t take
your vehicle through
an automatic car wash with
guide rails. The compact spare can get caught on
the rails. That can damage the tire and wheel,
and maybe other parts of your vehicle.
5-40

How to Check Limited-Slip Differential
The proper fluid should be added if the level is below
the
STEP mark on the reservoir. See the instructions on
the reservoir cap.
Rear Axle
When to Check and Change Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change it. See
“Scheduled Maintenance Services” in the Index.
How to Check Lubricant
If the level is below the bottom of the filler plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the filler plug hole.
What to Use
Standard Differential
Use SAE 75W-90 Synthetic Gear Lubricant (GM Part
No. 12378261) or equivalent meeting GM
Specification
9986 1 15.
To add lubricant when the level is low, use SAE 75W-90
Synthetic Gear Lubricant (GM Part No. 12378261) or
equivalent meeting
GM Specification 99861 15. To
completely refill after draining, add
4 ounces (1 18 ml)
of Limited-Slip Differential Lubricant Additive (GM
Part No. 1052358) or equivalent. Then fill to the bottom
of the filler plug hole with Synthetic Gear Lubricant.
Engine Coolant
The cooling s stem in your vehicle is filled with
DEX-COOL
8 engine coolant. This coolant is designed
to remain in your vehicle for
5 years or 150,000 miles
(240
000 kmb whichever occurs first, if you add only
DEX-COOL extended life coolant.
The following explains your cooling system and
how
to add coolant when it is low. If you have a problem
with engine overheating or if you need to add coolant to
your radiator, see “Engine Overheating” in the Index.
6-27

’ A CAUTION:
The brake wear warning sound means that soon
your brakes won’t work well. That could lead to
an accident. When you hear the brake wear
warning sound, have your vehicle serviced.
I NOTICE:
I I
Continuing to drive with worn-out brake pads
could result in costly brake repair.
Some driving conditions or climates may cause a brake
squeal when the brakes are first applied or lightly
applied. This does not mean something is wrong with
your brakes.
When you have
the front brake pads replaced, have the
rear brakes inspected, too. Brake linings should always
be replaced as complete
axle sets.
See “Brake System Inspection” in Section
7 of
this manual under Part C “Periodic Maintenance
Inspections.”
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or
if there is a rapid increase in pedal
travel.
This could be a sign of brake trouble.
Brake Adjustment
Every time you make a moderate brake stop, your
disc brakes adjust for wear. If you rarely make a
moderate or heavier stop, then your brakes might not
adjust correctly.
If you drive in that way, then -- very
carefully
-- make a few moderate brake stops about
every
1,000 miles (1 600 km), so your brakes will
adjust properly.
The park brake system has separate brake linings that
do not self adjust for wear. If the park brake lever pulls
up more than the normal eighteen clicks, the parking
brakes may need adjustment. See your dealer.
6-36

Capacities (Approximate)
Air Conditioning? ............. See the refrigerant
Automatic Transmission information label under the hood.
Drain and
Refill ......
Overhaul
VIN Engine Code K .
VIN Engine Code G .
Cooling System
VIN Engine Code K
....... 5 quarts (4.7 L)*
... 8.8 quarts (8.3 L)*
. 10.8 quarts (10.2 L)*
With Manual
With Automatic
VIN Engine Code G
Transmission ............ 12.5 quarts (1 1.8 L)
Transmission ............ 12.3 quarts (1 1.6 L)
With Manual
Transmission
...
With Automatic Transmission
.....
. . 15.3 quarts (14.5 L)
. . 15.1 quarts (14.3 L)
Crankcase
Oil and Filter Change
3800 V6 (VIN K) ......... 4.5 quarts (4.3 L)**
5.7L V8 (VIN G) ......... 5.5 quarts (5.2 L)**
Fuel Tank ................ 15.5 gallons (58.7 L)
Manual Transmission
Five-Speed
................ 3.4 quarts (3.2 L)*
Six-Speed ................... 4 quarts (3.8L)*
Rear Axle Lubricant ............ 1.75 quarts (1.7L)
Not all air conditioning refrigerants are the same.
If the air conditioning system in your vehicle needs
refrigerant, be sure the proper refrigerant is used. If
you’re not sure, ask your Pontiac dealer.
* Recheck fluid level after filling. See “Automatic
Transmission
Fluid” or “Manual Transmission Fluid”
in the Index.
** Recheck the oil level after filling. See “Engine Oil”
in the Index.
6-69