view all articles
How to Install the Allison 1000 C3 Torqkit 1999-2010
January 9, 2019

1. Install the P1 ring gear spacer 511003 between the P1 planet carrier and P1 thrust washer.

2. Install the C3 piston with orifice at 12 o’clock position. Lube seal surface and install evenly.

3. Install in the following order. *TIP: Remove or do not install piston return springs on apply plate at this time.

  • 0.125” 511643 Apply Plate
  • 0.071” GPZ195 Friction Plate
  • 0.098” 511642 Steel Reaction Plate
  • 0.071” GPZ195 Friction Plate
  • 0.079” R699662 Steel Reaction Plate
  • 0.071” GPZ195 Friction Plate
  • 0.079” R699662 Steel Reaction Plate
  • 0.071” GPZ195 Friction Plate
  • 0.079” R699662 Steel Reaction Plate
  • 0.071” GPZ195 Friction Plate
  • OE Backing Plate
  • Snap Ring

4. Use a feeler gauge to check clutch clearance between C3 backing plate and top friction plate. *Recommended clearance range: 0.040”-0.060.”

5. Remove friction and steel components and saturate friction plates in either manufacturerspecified ATF or comparable synthetic ATF.

6. Confirm C3 piston orifice is located at the 12 o’clock position.

7. If removed in step 3, install piston return springs on 0.125” apply plate.

8. Install 0.125” apply plate with slot center over C3 piston orifice.

9. Using the steel slots as a guide, align the friction plate slots during assembly.

10. Align slots in steel reaction plates, ensuring slots do not block or partially block the C3 piston orifice. Note: You may need to index or flip the steel reaction plate over to accurately locate and center the slot at 12 o’clock.

*TIP: If end of steel reaction plate slot lines up with last spline, plate slot will be aligned at 12 o’clock.

*TIP: One method of keeping slots aligned is to stack the parts on the P1 planet ring gear/C3 clutch hub, and load into case as an assembly in the horizontal position.

a. Begin with a friction plate and index so the slot is at 12 o’clock.

b. Place a steel reaction plate with slot at 12 o’clock, and alternate until 5 friction plates and 4 steel reaction plates are on/over the P1 ring gear/C3 clutch hub.

c. Place the ring gear and clutch pack into the housing as an assembly, carefully aligning the steel plates to the case and keeping the 12 o’clock reference point in position.

11. Install the C3 backing plate and snap ring.

posted by: Nathan Truncone   comments: 0