2012-WCD-Catalog.Pdf
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West Coast Differentials We Make the Difference. At West Coast Differentials we are committed to making your experience with us totally enjoyable. We think top-notch customer service is the most important thing we do. By asking ourselves what makes us different than other companies, our answer is that we deliver the level of customer service that other companies only promise. At West Coast Differentials, We Make the Difference is much more than a slogan. Our goal is to distribute the highest quality differential parts available at a competitive price. We expect to make sure our customers get the right parts the first time. We organize everything we do around these concepts. When problems do occur, we distinguish ourselves by how we react to these situations, and in the process, gain some of our most loyal wholesale and retail customers. Index AAM 9.25” Chrysler Front...............7 GM 8.25” IFS.......................37 AAM 10.5” Chrysler...................8 GM Camaro / Pontiac G8 / GTO .3..... 7 AAM 11.5” Chrysler & GM...............9 GM 8.5” & 8.625” ...................38 AMC Model 20 .....................10 GM 8.875” 12 Bolt Passenger...........39 AMC Model 35 .....................11 GM 8.875” 12 Bolt Truck ..............40 Chrysler 7.25” ......................12 GM 9.25” IFS.......................41 Chrysler 8” IFS......................12 GM 9.5” ..........................42 Chrysler 8.25”......................13 GM 10.5” .........................43 Chrysler 8.75”......................14 Toyota 7.5” ........................44 Chrysler 9.25”......................15 Toyota 8” .........................45 Dana 28..........................16 Toyota Landcruiser 8” Reverse Front .... ..46 Dana 30..........................17 Toyota Landcruiser 9.5” ...............47 Dana 44..........................18 Toyota Tacoma & T100 7.5” Front ........48 Dana 50..........................20 Toyota Tacoma & T100 8” Rear..........48 Dana 60..........................21 Toyota Tacoma/Tundra & FJ 8” Reverse IFS .49. Dana 70..........................22 Chrysler Rear Axle Chart ..............50 Dana 80..........................23 Ford Passenger Rear Axle Chart.........51 Dana S110/S135/S150 ..............24 Ford Truck Rear Axle Chart.............52 Ford 7.5”..........................25 GM Passenger Rear Axle Chart..........54 Ford 8”...........................26 GM Truck Rear Axle Chart..............55 Ford 8.8” .........................27 Jeep Rear Axle Chart.................57 Ford 9”...........................28 Front Axle Chart ....................58 Ford 9.75”.........................30 Performance Axle Chart...............61 Ford 10.25”........................31 Limited Slip Differentials ..............64 Ford 10.5”.........................31 Automatic Locking Differentials & Spools . 66 GM ’55 Truck.......................32 Selectable Locking Differentials ..........68 GM ’55 Passenger...................32 Set-Up Specifications .................70 GM Corvette.......................33 Transfer Case Kits ...................72 GM 7.25” IFS.......................34 Ratios & Formulas ...................73 GM 7.5” & 7.625”....................35 Axle Measurement ............ .......74 GM 8 ”............. ..............36 Differential Identification Chart ..........75 GM 8.2” ..........................36 At West Coast Differentials, we assemble our own complete differential overhaul kits made with only the highest quality components. Each of our kits are designed to ensure a trouble-free installation and long lasting performance. BK - Basic Kit: The Basic Bearing Kit is assembled for the fully stocked shop and includes only the basics for differential repair: pinion and carrier bearings, pinion seal, o-ring (where applicable), pinion nut, and crush sleeve. Our Basic Kit part numbers begin with the prefix BK. IK - Installation Kit: Our most complete kit, the Master Installation Kit comes complete with everything you’ll need to rebuild the center section of your differential. These kits include the following, as needed per application: pinion and carrier bearings, pinion seal, pinion shims, pinion nut, crush sleeve or depth shims, ring gear bolts (most applications), o-ring, gear marking compound & brush, Loctite, cover gasket or silicone, carrier or super shims, slingers & baffle, and installation instructions. Our Master Kit part numbers begin with the prefix IK. MK - Mini Kit: The Mini Kit is ideal for low mileage gear ratio changes and includes everything but the bearings, as needed by application: pinion seal, pinion shims, crush sleeve or depth shims, ring gear bolts, o-ring, gear marking compound & brush, Loctite, carrier or super shims, and installation instructions. Our Mini Kit part numbers begin with the prefix MK. PK - Pinion Kit: The Pinion Kit is ideal for low mileage gear ratio changes or for budget repairs when only pinion bearings are needed. The kits include pinion bearings, pinion seal, pinion shims, crush sleeve or depth shims & o-ring (where applicable). All of our Pinion Kit part numbers start with the prefix PK. IPK - Internal Parts Kit: The Spider Gear Kit or “IPK” replaces the internal differential components and includes side gears, pinion gears, side and pinion gear thrust washers, cross pin shaft, and cross pin bolt. Transfer Case Kit: The Transfer Case Kit is a complete bearing and seal rebuild kit and includes bearings, gaskets, seals, shift fork inserts and small parts (where applicable). West Coast Differentials Products Ring and Pinions: Our most popular ring and pinions carry the Sierra Gear label. These are reasonably priced and the highest quality aftermarket gear sets available. We have a complete inventory of OEM ring and pinion sets for Chrysler, Dana, Ford and GM axles. We also stock US Gear and Richmond Gear ring and pinion sets. Installation Kits: We package our own kits using only the very highest quality components, most of which are OEM. We have the most comprehensive line of the most complete kits in the industry. Differentials: West Coast Differentials stocks open differentials, limited slip or positraction differentials, and automatic and selectable locking differentials as well as spools. These are available from OEM manufacturers, Auburn Gear, ARB, Eaton, and others. Axles: We carry stock replacement axles and performance aftermarket axles. In stock replacement axles we have OEM and American made shafts, as well as high quality aftermarket shafts in the Sierra Gear line. Performance axles include chromoly and standard alloy shafts with stock or upgraded splines, as well as cut to fit shafts for custom housings. Third Members: West Coast Differentials can assemble third members for Chrysler 8.75”, Ford 8” and 9”, and various GM and Toyota axles. We will build them with any ratio, differential, housing and yoke available. Most will be assembled and shipped not later than the day after you order! This catalog includes listings for our most common parts and the most common differential applications. We also stock (but do not list in this catalog) individual bearings, seals, shims, internal parts, tools, used parts and parts for less common differentials. If you don’t see it, ask! AAM 9.25” Chrysler Front Ring Gear Diameter 9.25” Ring Gear Bolts 12mm x1.5” LH Threads 12 Cover Bolts 14 Pinion Splines 30 Carrier Breaks None Axle Splines 33 Ring and Pinion Sets Ratio OEM 3.42 CHY9.25-342R 3.73 CHY9.25-373R 4.11 CHY9.25-411R 4.56 CHY9.25-456R Installation Kits Kit Basic Master Pinion Mini 9.25” AAM Front BK C9.25F IK C9.25F PK C9.25F MK C9.25F Lockers Differential ARB Air Locker Lock Right Eaton E-Locker TrueTrac 9.25” AAM Front ARBRD51 PT1950 EAT19684 (needs machining) TT 914A643 Cases and Internal Parts Kits Differential Case Internal Kit Loaded Case 9.25” AAM Front 03-06 GM 14038087 IPKGM9.5S GM 40013506 9.25” AAM Front 07& Up CHY40028204 IPKC9.25FS 7 AAM 10.5” Chrysler Ring Gear Diameter 10.5” Ring Gear Bolts 14mm x 1.5” LH Threads 12 Cover Bolts 14 Pinion Splines 30 Carrie r Breaks None Axle Splines 30 Ring and Pinion Sets Ratio OEM 3.73 CHY10.5-373 4.11 CHY10.5-411 4.56 CHY10.5-456 Installation Kits Kit Basic Master Pinion Mini 10.5” AAM BK C10.5 IK C10.5 PK C10.5 MK C10.5 Positractions Differential OEM Helical 10.5” AAM CHY40010351 Cases and Internal Parts Kits Differential Case Internal Kit 10.5” AAM CHY40008168 IPKC10.5S 8 AAM 11.5” Chrysler & GM Ring Gear Diameter 11.5” Ring Gear Bolts 14mm x 1.5” LH Threads 12 Cover Bolts 14 Pinion Splines 30 Ca rrier Breaks None Axle Splines 30 Ring and Pinion Sets Ratio OEM Sierra Gear West Coast Gear 3.42 GM 11.5-342 3.73 GM 11.5-373 4.11 GM 11.5-411 4.56 SG GM11.5-456 WCGGM11.5-456 4.63 GM 11.5-463 4.88 SG GM11.5-488 WCGGM11.5-488 5.13 WCGGM11.5-513 Installation Kits Kit Basic Master Pinion Mini 11.5” AAM Chrysler BK A11.5 IK C11.5 MK C11.5 11.5” AAM GM BK A11.5 IK GM11.5 MK GM11.5 Positractions & Lockers Differential ARB Air Locker Detroit Locker OEM Helical Truetrac 11.5” AAM ARBRD139 DET250S-195A CHY40025134 TT 915A568 Cases and Internal Parts Kits Differential Case Internal Kit Loaded Case 11.5” AAM Chrysler CHY40023074 IPKC11.5S CHY40023075 11.5” AAM GM CHY40023074 IPKGM11.5S CHY40023075 9 AMC Model 20 Ring Gear Diameter 8.875” Ring Gear Bolts 7/16” x 20 RH Threads 8 Cover Bolts 12 Pinion Splines 28 Carrier Breaks 2.73 / 3.08 Axle Splines 29 Ring and Pinion Sets Ratio OEM Sierra Gear West Coast Gear 3.08 3.31 SG M20-331 3.54 SG M20-354 WCGM20-354 3.73 SG M20-373 4.10 SG M20-411 WCGM20-411 4.56 SG M20-456 WCGM20-456 4.88 SG M20-488 Installation Kits Application Basic Master Pinion Mini Model 20 BK M20 IK M20 PK M20 MK M20 Positractions & Lockers Differential ARB Air Locker Auburn Pro Auburn Ected Detroit Locker Lockright Trac Lok Truetrac 2.73 & Down ARBRD187 AG 545006 PT 1710 TT 912A573 3.08 & Up ARBRD186 AG 542081 AG 545007 DET187S-47A PT 1710 WCD27217X TT 912A579 Cases and Internal Parts Kits Differential Case Internal Kit 2.73 & Down USEM20CASE-2 IPKM20S 3.08 & Up USEM20CASE-3 IPKM20S One piece axles are much more reliable than the notoriously weak two piece axles in Model 20 rear ends.