PPE Heavy Duty Cast Aluminum Rear Differential Cover Installation Guide
- June 9, 2024
- PPE
Table of Contents
PPEpower.com
Rear Differential Cover – Ford
Heavy-Duty Cast Aluminum
Rear Differential Cover
1986 to 2017 Ford Excursion, F250/F350 (non dually),
(10.25” and 10.5”) 12 bolt differential
(338051000, 338051010, 38051020)
Installation Guide
Heavy Duty Cast Aluminum Rear Differential Cover
DISCLAIMER OF LIABILITY
Performance products can increase horsepower above and beyond factory
specifications.
Additional horsepower creates more stress on the drive-train components, which
could result in drive-train failure.
Note regarding emissions-related, non-E.O.-legal products: THESE PRODUCTS ARE
LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES THAT MAY NEVER BE USED, OR
REGISTERED OR LICENSED FOR HIGHWAY OR OFF-ROAD USE.
This agreement sets forth the terms and conditions for the use of PPE products. The installation of this product indicates that the Buyer has read and understands this agreement and accepts the terms and conditions. PPE (Pacific Performance Engineering) Inc., its distributors, employees, and dealers (the “Seller”) shall not be responsible for the product’s proper use and service. The buyer hereby waives all liability claims. The Buyer hereby acknowledges no reliance on the Seller’s skill or judgment to select or furnish goods suitable for any particular purpose and that there are no liabilities which extend beyond the description on the face hereof, and the Buyer hereby waives all remedies or liabilities expressed or implied, arising by law or otherwise (including without any obligation of the Seller with respect to fitness, merchantability and consequential damages), or whether or not occasioned by the Seller’s negligence. The Seller disclaims any warranty and expressly disclaims any liability for personal injury or damages. The Buyer acknowledges and agrees that the disclaimer of any liability for personal injury is a material term for this agreement and the Buyer agrees to indemnify the Seller and to hold the Seller harmless from any claim related to the item of equipment purchased. Under no circumstances will the Seller be liable for any damages or expenses by reason of use or sale of any such equipment. The Seller assumes no liability regarding the improper installation or misapplication of its products. It is the installer’s responsibility to check for proper installation and if in doubt, contact the manufacturer. The Buyer is solely responsible for all warranty issues from the manufacturer.
LIMITATION OF WARRANTY
The Seller gives Limited Warranty as to description, quality, merchantability,
and fitness for a particular purpose, productiveness, or any other matter of
Seller’s product sold herewith. The Seller shall not be responsible for the
products proper use and service and the Buyer hereby waives all rights other
than those expressly written herein. This warranty shall not be extended,
altered or varied except by a written instrument signed by Seller and Buyer.
Limited lifetime warranty on all PPE cast aluminum products, and PPE
Transmission Coolers. Three (3) year limited warranty on PPE Manifolds and Up-
Pipes Kits, and OEM-Length Up-Pipes. One (1) year limited warranty on all
other PPE products from the date of sale to original buyer and limited solely
to the parts contained within the products kit. All products that are in
question of Warranty must be returned prepaid to the Seller and must be
accompanied by a dated proof of purchase receipt. All Warranty claims are
subject to approval by Seller. Under no circumstances will the Seller be
liable for any labor charged or travel time incurred in diagnosis for defects,
removal, or re-installation – of this product or any other contingent
expenses. Under no circumstances will the Seller be liable for any damage or
expenses incurred by reason of the use or sale of any such equipment. In the
event that the buyer does not agree with this agreement: the buyer may
promptly return this product, in a new and unused condition in its original
packaging, with a dated proof of purchase to the place of purchase within ten
(10) days from date of purchase for a full refund. The installation of this
product indicates that the buyer has read and understands this agreement and
accepts its terms and conditions.
NOTICE:
The PPE Heavy Duty Diff Cover is designed to fit FORD F-250 / F-350 single
rear wheel (12 Bolt – 10.25” and 10.5”). However, in some applications, or
because of the use of certain factory options and / or aftermarket equipment,
there may be clearance problems. It is the responsibility of the vehicle
owner/installer to ensure that there is no contact between the cover and
other moving or fixed vehicle components. 
CONTENTS:
A (1) PPE Heavy-Duty Rear Diff Cover
B (1) Neodymium Magnet-equipped Fill Plug (installed)
C (1) Neodymium Magnet-equipped Drain Plug (installed)
D (12) 5/16” – 18 X 1” socket head cap screws
E (12) Flat washers
F (1) 1/4” NPT Plug (installed)
PROJECT REQUIRES:
Torque wrench
Oil drain pan
Manufacturer-recommended oil
RTV silicone
Shop towels
Gloves
Eye protection
Step 1:
Vehicle off and cool.
Remove stock hardware.
Drain and recycle oil. 
Step 2:
Scrape off old silicone from mating surface.
Step 3:
Wipe away old oil.
Step 4:
Thoroughly clean and dry housing flange in preparation for install.
Step 5:
Apply a continuous bead of silicone (RTV) sealer on the flange around the
screw holes as shown.
Step 6:
Preassemble washers onto socket head screws (D, E).
Carefully align cover.
Be careful not to smear sealant. Thread two preassembled screw sets on
opposing sides to secure (Fig.1-1,2).
Finger tight for now.
Tighten bolts in a crossing pattern as shown. Torque to 20-25 ft. lbs.
Remove Fill Plug (B) and fill to sight-line with manufacturerrecommended oil.
Tighten NPT, Fill and Drain Plug (F, C, B). Check for leaks.
Installation complete.
Maintenance:
At each oil service, clean off both plugs of ferrous metal particles.
Reinstall.PPEpower.com