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VehiclesTraxxas Slash 4X4 BL-2sDifferential service

Maintenance reference

Differential service

Traxxas Slash 4X4 BL-2s · 68154-4

Traxxas Slash 4X4 BL-2s, 68154-4; original equipment covered by the cited edition.

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Start with the correct reference

The manual describes front and rear differential access and oil servicing. Match the axle and original assembly; this is not a center-drive service reference.

Service guides

Choose the operation for the assembly being serviced. Each step links to its manufacturer reference.

Slash 4X4 BL-2s front differential removal and refill

Traxxas Slash 4X4 BL-2s (68154-4); original front differential only. This does not cover the center drive.

Before starting

Steps

  1. Remove the two 3 x 15mm button-head screws securing the top bumper mount to the differential case.Source, PDF p. 26
  2. Turn the chassis over. Remove the three 4 x 10mm countersunk screws holding the bumper and skid plate to the bulkhead; leave the two rear screws in place.Source, PDF p. 26
  3. Slide the bumper assembly off the chassis.Source, PDF p. 26
  4. Remove the 3 x 15mm button-head screw from the differential tie bar, then slide the tie bar off the truck.Source, PDF p. 26
  5. Remove the two 3 x 15mm button-head screws from the differential cover. Leave the two shock-tower screws in place.Source, PDF p. 27
  6. Use a 1.5mm hex wrench to remove the two screw pins securing the driveshaft yokes to the differential output shafts.Source, PDF p. 27
  7. Remove the differential cover and slide the differential out through the front of the case.Source, PDF p. 27
  8. Remove the four 2.5 x 10mm screws from the differential case. Carefully separate its halves over a towel to collect the fluid.Source, PDF p. 27
  9. Drain the old fluid. Remove the spider gears if needed to make draining easier.Source, PDF p. 27
  10. Reinstall the spider gears if removed, then fill the case until the spider gears are submerged halfway.Source, PDF p. 27
  11. Align the screw holes and rejoin the case halves. Keep the rubber gasket in place so the differential does not leak.Source, PDF p. 27
  12. Install the four 2.5 x 10mm screws and tighten them securely.Source, PDF p. 27
  13. Reinstall the differential by reversing the documented removal sequence.Source, PDF p. 27
Slash 4X4 BL-2s rear differential removal and refill

Traxxas Slash 4X4 BL-2s (68154-4); original rear differential only. This does not cover the center drive.

Before starting

Steps

  1. Remove the two 3 x 20mm button-head screws securing the top bumper mount to the differential case.Source, PDF p. 27
  2. Turn the chassis over. Remove the two 3 x 12mm countersunk screws holding the bumper and skid plate to the bulkhead; leave the two rear screws in place.Source, PDF p. 27
  3. Remove the 3 x 20mm button-head screw from the bumper mount and tie bar.Source, PDF p. 27
  4. Slide the bumper assembly off the chassis, then remove the tie bar.Source, PDF p. 27
  5. Remove the two 3 x 15mm button-head screws from the differential cover. Leave the two shock-tower screws in place.Source, PDF p. 27
  6. Use a 1.5mm hex wrench to remove the two screw pins securing the driveshaft yokes to the differential output shafts.Source, PDF p. 27
  7. Remove the differential cover and slide the differential out of the case.Source, PDF p. 27
  8. Remove the four 2.5 x 10mm screws from the differential case. Carefully separate its halves over a towel to collect the fluid.Source, PDF p. 27
  9. Drain the old fluid. Remove the spider gears if needed to make draining easier.Source, PDF p. 27
  10. Reinstall the spider gears if removed, then fill the case until the spider gears are submerged halfway.Source, PDF p. 27
  11. Align the screw holes and rejoin the case halves. Keep the rubber gasket in place so the differential does not leak.Source, PDF p. 27
  12. Install the four 2.5 x 10mm screws and tighten them securely.Source, PDF p. 27
  13. Reinstall the differential by reversing the documented removal sequence.Source, PDF p. 27

Parts, tools and consumables

Required by the instructions

Listed in the reference

Part links open an exact-model OEM listing. Quantities, reused hardware and condition-dependent replacements may need checking in the manual. A listed part is not an instruction to replace it.

Setup specifications

Differentials
Limited-slip front, gear rearStock
Sources
Diff oil, front
SAE 30,000W (maker grade)Stock
Sources

Keep the axle positions and original units shown. Values describe the cited configuration. Replacement-derived and community figures keep their stated basis.