iWARNING: Products on this page can expose you to a chemical, which is known to the St ate of California to cause cancer or reproductive harm. **For more information go to www.P65Warnings.ca.gov**126NEW PINION SHAFTS1961-69 Standard Differential Pinion Shafts (NOT for Powerglide)These shafts are precision made of better than stock material (nearly twice the original strength). We are hearing of more spline wear of the internal spline teeth. Many are now 40-50% worn off! There is also the possibility of fatigue in the spline where the gear presses on. This new shaft is a MUST for 4:11 gears and highly suggested for any high performance Corvair. Machined for speedo gear on 1961-64. No gears included. "Bare" shaft. 1961-64 Cars & 1961-65 Vans: C6027E 3 lbs. 1965-69 Cars: C6027L 3 lbs.4.11 Ring & PinionNEW UNITS - Made of best materials and drilled for use in all 1961-69 axles. At any given RPM your MPH will be about 3-5 mph less than with a 3:89. Top speed at 5500 RPM is approximately 100 MPH. 3000 RPM gives about 54 MPH. (Actual speeds and RPM will vary.) Pinion gear must be pressed onto old shaft. Standard and PG.Includes Shim Assortment. Street Use C5050 14 lbs. High Shock Load: Off Road use only C8644 14 lbs. NOTE: Even "of f road" are not designed for large paddle wheels and extreme abuse!3.08, Ring & Pinion Fit Standard and PG C9397 14 lb s. Same description as 4.11 but greatly decreases engine RPM. NOT SUGGESTED for low hp. in hilly areas. Ultimate 4 Spider Gear CarrierThe 4-Spider gear unit was developed long ago by Crown and later improved by Otto Parts. However, for years CIDCO 1 had been taking this OTTO unit and making it even stronger for customers demanding the ultimate in differential strength and reliability. Clark's made slight improvements to the CIDCO design and now offer the strongest 4 Spider Carrier ever. POSI owners see note below.WHAT'S DIFFERENT? 1. The 4-Spider carrier is remachined in the area of each Spider gear shaft to accept the stock cupped washers. 2. The Spider shafts are machined to allow for maximum lubrication. 3. The center block is designed and machined so that its walls are thicker. It is fabricated from 4130 steel bar stock and then heat treated for extra strength. 4. For 1965-69 Cars, a stock axle yoke nut is ground to a control thickness. This allows the builder to fine tune the axle yoke "axial play". By assembling each half of carrier with the "standard" yoke nut in place and bolting the yoke to the carrier, the builder can determine the actual thickness for "minimum" yoke movement. This provides long term rear suspension alignment and better handling. Instructions are provided. (Does require grinding or milling and polishing of your stock nuts and return of our "standard" nut for return of the Core Fee. SHOP MANUAL A MUST.Basic Ultimate Kit COMPLE TE Ultimate Kit1961-64 Cars & 1961-65 Vans C9498 9 lbs. C9498C 12 lbs.1965-69 Cars*C9499 9 lbs.*C9499C 12 lbs. 60-64 REBUILT AXLE YOKES: These USED units are cleaned, inspected and a new heavy duty universal joint is installed. You can remove and replace without having to press in the universal joint. Price includes a refundable core. (1960 Note: Use C11573 Lf & Rt) Cars & FC left side (long one) C11572 5 lbs. Cars & FC right side (short one) C11573 5 lbs.Basic ULTIMATE Kit (as shown) ? cast carrier housing? 4-Spider housing center block? (2) special shafts? (1) pin? "standard" nut (65-69 kits)? instructionsCOMPLETE Ultimate Kit (as shown) ? cast carrier housing? 4-Spider housing center block? (2) special shafts? (1) full length shaft? (4) new Spider gears? (4) Spider gear cup shims (not shown)? (2) new side gears? (2) side gear shims ? (1) pin? "standard" nut (65-69 kits)? instructionsPOSI OwnersThe Complete 4-Splder Kits on pg. 126 include (2) side gears. You only need (1) and will have to use your old posi side gear. ADD "P" to PART # and price is less $$ and kit will only come with (1) side gear. (example: C9499CP)ON WEBSITE - CLICK ON THE COMPLETE KIT PART NUMBER AND THE "P" NUMBER WILL DISPLAY BELOWMACHINED POSI COVER: The posi clutch cover is the weakest part of a posi unit. The thin casting is subjected to extreme torque and high shock loads and finally breaks with terrible results. This replacement is machined from stronger steel and was designed for maximum strength. Drilled to work with all years. 60-64 C9868E 6 lbs. 65-69 C9868 6 lbs.Must also order Differential Cover Bolts Set of 9 w/ lockwashers C4400 6 oz.*Price includes Core Fee for "Standard" nut.We highly suggest the Complete Kit