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Coil sprung Land Rovers came with several different axle
configurations depending on the year manufactured, the model,
optional equipment such as ABS brakes and the country it was
sold in. This discussion is oriented toward U.S. specification
vehicles and does not include Range Rover 4.0/4.6 models and
possibly Series ll Discoveries which we haven't looked at yet. A
quick overview of the stock axles is as follows:
U.S. spec Range Rovers from 1987 to mid 1993 all had 1"/10
spline axles front and rear at which point they were increased
in size to 1.25"/24 spline. There was a small change in length
of the rear axles with the 1990 models due to the addition of
ABS brakes. 1987 models had suffix A front axles, 1988/89 models
were suffix B's. They changed again with the addition of ABS
brakes in 1990. Constant Velocity (CV) joints also changed with
the axle changes. In mid 1993 the front axles also were enlarged
to 1.25/24 spline although the CV end of the front inner axle
was unfortunately reduced in size to 1.030"/32 spline.
All U.S. spec Discoverys and Defender 90's came equipped with
1.25/24 spline axles front and rear and unfortunately the
1.030"/32 spline CV joints. I say unfortunately because the
1.030" diameter reduces the potential strength substantially.
Defender 110's were 1.25"/24 spline rear and 1.25"/24 spline in
the front with the exception of the outer axle which is 1"/10
spline into the drive flange.
All stock Land Rover axles are manufactured from commercial
grade materials and designs which can be easily upgraded for
increased strength and durability. The earlier smaller axles can
also be upgraded to the later larger sizes.
Great Basin Rovers’ late model Rover axles are unique because
they are all manufactured with a special aviation grade alloy
steel which has properties that allow maximum flex without
breaking. On rocks or sand or even icy roads, spinning tires
that suddenly catch traction can cause normal axles to snap if
the stress is great enough. When your off-road vehicle has a
rigid center-locking differential like Land Rovers do, you need
forgiving axles that will handle sudden traction changes without
giving out.
When climbing hills or helping recover a stuck vehicle, a
powerful four-wheel drive runs the risk of damaged axles if high
amounts of stress are encountered at the wrong times. If you
find yourself using your four-wheel drive constantly, chances
are the added durability and flex of the Great Basin Axles could
really serve you well in the long run.
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Heavy
Duty Rear Axle Upgrade Kits (24 Spline) |
Heavy Duty Rear
Axle Upgrade Kits
GBR’s late model Rover axles are all manufactured
with a special aviation grade alloy steel and all
utilize an advanced wasted design that allow maximum
flex without breaking. All of these axles have bead
blasted final finishes. Most applications come
supplied with GBR heavy duty drive flanges. These
axles are estimated to be at least 100% stronger
than stock axles and are highly recommended for
extreme four wheelers, vehicles with oversize tires
and/or more powerful engines. All of these axles are
1.25"/24 spline so no machining or custom
differentials are required.
Note: Defender 110’s from the factory have a 2 piece
axle i.e. separate drive flanges, which can be
reused with our axles.
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Item # |
Product Description |
Price |
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GBR-K571882/3 |
Range
Rover 1987-89 |
$599.00
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GBR-K3270/71 |
Range
Rover 1990-95 |
$599.00
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GBR-K3270/71 |
Discovery
1994-98 |
$599.00
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GBR-K3270/71 |
Defender
90 1994-97 |
$599.00
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GBR-K2454/55 |
Defender
110 1993 |
$599.00
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Extreme
Duty Rear Axle Upgrade Kits
(30 Spline) |
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This axle kit
includes larger axles than stock (1.315") and a larger spline count
(30). The axles are manufactured from the finest aviation grade
steel available, and are fully waisted and bead blasted. This kit
requires a conversion kit to replace the side gears in the
differential housing and also requires the drive spindles to be
bored slightly oversize (+.020").
We can supply
the side gear conversion kits for both ARB and Detroit Locker
differentials and can also provide spindles bored to the correct
size on an exchange basis. This kit also comes with our special
drive flanges. We can also supply these axles "gun bored"**, a
process where a hole is bored down the center of the axle for two
reasons:
1.
This bored hole
reduces the axles’ weight, allowing for less resistance to torque.
2.
This bore also
makes the axle significantly stronger. This may seem like a
contradiction. However, the additional surface area creates another
surface that must break before a failure occurs. It also allows for
a forgiving flex that could save your axles from a jolt that might
otherwise snap a more rigid design. The same is true in driver
shafts: a hollow tube drive shaft is stronger than a solid one!
Note:
There is a $150 core charge included for part # [GBR-+.020”] of
$150.00 which will be refund upon core return.
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Item # |
Product Description |
Price |
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GBR-K3270/71-30 |
Range
Rover 1990-95 |
$699.00
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GBR-K3270/71-30 |
Discovery
1994-98 |
$699.00
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GBR-K3270/71-30 |
Defender
90 1994-97 |
$699.00
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GBR-ARBCONV-30 |
ARB
Side Gear Conversion Kit |
$299.00
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GBR-DETROITCONV-30 |
Detroit
Side Gear Conversion Kit |
$199.00
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GBR-+.020” |
Remanufactured
Oversized Spindles |
$299.00
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Heavy
Duty Front Axle Upgrade Kits |
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This front axle kit is manufactured with the same high quality aviation alloy
steel and advanced design and finish, waisted and bead blasted, as our rear
axles. This kit replaces the inner axle and the cage in the constant velocity
joint (See CV Joint section for details). This kit allows you to replace the two
weakest parts of the front axle assembly economically. This kit is a direct
replacement and requires no machine work or custom differentials. |
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Item # |
Product Description |
Price |
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GBR-3049/50 |
Discovery
1994-98 |
$699.00
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GBR-3049/50 |
Defender
90 1994-97 |
$699.00
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GBR-3049/50 |
Range
Rover 1993-95 |
$699.00
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Extreme
Duty Front Axle Upgrade Kits |
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These axles (GBR-2520-24 &
GBR-2521-24) are again manufactured with the finest aviation alloys and designed
for the maximum longevity under the most extreme conditions using the advanced
designs of our other axles.
This kit replaces all of the
front axle components - inner axles, CV joints and drive flanges. The difference
with this kit is that it eliminates the 1.030"/32 CV joint and replaces it with
a 1.20"/23 spline CV joint (GBR-2522). This eliminates the small 1.030 inch end
of the inner axle, the weak point in the front axle assembly.
The CV joint supplied with
this kit is larger and has 1.20"/23 spline axle input. We also upgrade it by the
addition of one of our heavy duty CV cages (GBR-CG2522). GBR drive flanges are
included to complete the package. Also included are two fitting bushes, two
FTC254 spacers and two RTC4820 spring rings.
Note:
1987-89 Range Rovers require some machining to swivel balls to complete the
installation.
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Item # |
Product Description |
Price |
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GBR-K2520/21-24 |
Discovery
1994-99 |
$1799.00
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GBR-K2520/21-24 |
Defender
90/110 1993-97 |
$1799.00
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GBR-K2520/21-24 |
Range
Rover 1987-95 |
$1799.00
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GBR-EXFABS |
ABS/Wheel
Speed Sensor Rings |
$300.00
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Heavy
Duty Constant Velocity [CV] Joints |
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One of the problems
encountered with all stock CV joints when they are used off-road, is that they
are designed for maximum mileage longevity on road. This means that they consist
of a very hard tool steel that has been treated to a Rockwell (RC) rating of 70.
The Rockwell rating
measures hardness, a trait achieved through extensive heat treating. CV joints
are normally heat treated to a higher level so that they can withstand many
miles of wear. This hardness however, is a negative trait off-raod because it
allows for no flexibility. The high shock loads frequently encountered in
extreme off road situations will destroy stock CV-Joints quickly simply because
of their high density. A 70 RC rating is comparable to the hardness rating of
glass, so it is not surprising that the number one cause of CV joint failure is
the inner cage shattering!
We solve this problem by
having our CV cages manufactured from cryogenically stabilized aviation grade
steel and apply a more appropriate RC rating. This combination of tempering
techniques approximately doubles the peak overload capability while retaining
75% of the mileage longevity. Reducing the mileage longevity may sound like a
disadvantage but if you are doing constant off-roading with your Rover, it is
extremely unlikely your stock CV joints would last for normally expected
lifespan anyway. These units can be retrofitted to used CV joints in good
condition.
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Item # |
Product Description |
Price |
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GBR-CG3051 |
Cage
for STC3051 |
$189.00
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GBR-CG2522 |
Cage
for AEU2522 |
$189.00
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Heavy
Duty Drive Flanges |
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These are the Great Basin
Rovers heavy duty drive flanges that are supplied standard with some of our axle
kits. These can also be used by themselves as an optional upgrade.
Heavy Duty Drive Flanges
improve off-road performance in two ways:
1. The Great Basin Flanges
are machined from chrome molybdenum steel and splined to exact tolerances to
provide a tighter fitting spline that reduces backlash in the case of traction
loss and regain. The higher tensile that results from this process also allows
for a longer wear-life of the splines.
2. Instead of the original
plastic cap which has been known to allow water to enter the wheel bearings,
these flanges are threaded and fitted with a hexagon screw on cap machined from
solid steel. Unlike the plastic cap, these caps will not easily be knocked off
while off-roading. These flanges have a positive seal that neither allows oil to
escape nor water to enter. On some models these heavy duty flanges eliminate
the need for the axle case oil seal and permit the lubrication of your rear
wheel bearings with gear oil.
Installation Note:
We
recommend using RTC3511 hub seals even if you don't eliminate the axle case
seal. This is a double lip seal and a vast improvement over the seal currently
specified by Land Rover. When Land Rover added the axle case seal they used a
much less effective hub seal because the wheel bearing now specified only
requires wheel bearing grease for the bearings. Wheel bearing grease is very
easy to seal in because it doesn’t go anywhere ie: it doesn't flow. The problem
is the current specified seal isn't very effective at sealing things out such as
water - hence the risk premature of wheel bearing failure! When installing
RTC3511 hub seals, recess them 3mm into the hub or you will get a false reading
on your wheel bearing preload.
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Item # |
Product Description |
Price |
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GBR5806 |
Defender
110 Rear |
$189.00
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GBR-859 |
Defender
90, Discovery |
$149.00
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GBR-UNF |
Range
Rover |
$199.00
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RoverTracks
HD Rear Axles |
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RoverTracks axles are made from a proprietary alloy used in a
wide spectrum of heavy duty applications including off-road
trucks, race cars and dragsters. The rear axles are a full 1.25"
in diameter and feature an integrated axle flange and polished
surface for added strength. They are a 24-spline configuration
designed to fit any NAS Defender 90, Discovery Series 1, and
many late model Range Rover Classics. |
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Item # |
Product
Description |
Price |
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RTR-HDRA-S |
HD
Rear Axle Set [Use w/ Steel Wheels] |
$390.00 |
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RTR-HDRA-SA |
HD
Rear Axle Set [Use w/ Steel or Alloy Wheels] |
$440.00 |
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RoverTracks
HD Front Axles |
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RoverTracks axles are made from a
proprietary alloy used in a wide spectrum of heavy duty
applications including off-road trucks, race cars and dragsters.
The front axles are 1.25" in diameter. They feature a 24-spline
differential end and a 23-spline CV end.
Note: The front axles will
not fit stock Discovery, Defender, or RangeRover Classic CVs.
Stock CV joints MUST be upgraded in order to fit the axles.
The axles are only for use with
our heavy duty CV upgrade or Genuine Land Rover CV (part #
AEU2522) (sometimes referred to as the Defender 110 1-ton CV).
Please feel free to call with any questions. |
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Item # |
Product
Description |
Price |
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RTR-HDFA |
HD
Front Axle Set |
$380.00 |
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RTR-HD110CV |
HD
110 CV Joint [ea.]
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$231.00 |
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RTR-HDFAKIT |
HD
Front Axle Set w/ HD 110 CV’s |
$950.00 |
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