|
|
Warranty
|
| Metro Parts Market warranties
all differentials to be free from defects in materials and workmanship
at the time of purchase. Purchasers and users rely upon their own
judgment as to suitable use, selection, service and installation.
No warranty on differentials that show evidence of improper INSTALLATION,
ALTERATION, ABUSE OR BREAKAGE. |
|
|
|
|
Break-In
|
| Any overloading or overheating
will cause the oil to break down and the ring gear and pinion will fail.
A ring gear and pinion installation, especially a high numeric ratio with
new bearings, can cause an excessive heat build up in the rear end and
cause softening of the gear teeth and bearings if a break-in is not performed. |
| Break-in Procedure -
All vehicles and all applications: |
| To break-in the installation,
perform a run-in prior to driving with the rear wheels jacked up, operating
at idle speed in high gear for a minimum of five (5) minutes. Then
drive the vehicle 10 miles at a normal speed, let cool for one (1) hour
and then repeat entire process again. |
|
|
|
| Notes for Special Use Vehicles: |
|
| Vehicles used for Towing: |
| Vehicles
used for towing need approximately 200 - 300 miles of normal street driving
before being used for towing. |
|
| Circle
track race cars: |
| Make approximately 6 - 8
laps at slow speed, then let cool for 30 minutes, make 6 -8 laps more at
slow speed, then 2 -3 laps at full speed, let cool again for 30 minutes. |
|
| Drag
cars: |
| Drag cars need only an initial
run-in since they are driven short distances and heat is not normally a
problem with proper lubrication and backlash allowances. |
|
|
|
| Installation Notes |
|
| No
crush washer: |
| All 9 inch units us a solid
spacer in place of the stock crush sleeve. This is not only stronger,
but facilitates the replacement of the pinion yoke and/ or seal without
affecting pinion bearing preload. |
|
| Trac
Locs: |
| Trac Locs require that you
always install the driver side axle first to avoid misalignment of the
split side gears. |
|
| Tire
Size: |
| All positraction differentials
require both rear tires to have the same circumference in order for the
differential to work properly without wearing out prematurely. |
|
| Recommended
gear oil: |
GL-5 80 - 90 wt.
Positractions units require 2 bottles
of Ford Friction Modifier Additive, available at
your local Ford Dealer. |
|
|
Return
to Rear End Catalog
|
