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  • Sluggish shifts


Fatigued OEM 3-4 accumulator springs.


This 3-4 accumulator spring re-establishes proper shift feel in these transmissions. This is a duplicate of OEM diesel application 47RE.

42RE, 42RH, 46RE, 46RH, 47RE, 47RH, 48RE

3-4 Accumulator Spring
Part No. 12861-01

Matches OE Diesel calibration

View Instructions

In vehicles with 42-46-47RH/RE transmissions, it is common for the 3-4 accumulator spring to fatigue, causing sluggish shifts, or to break. Sonnax offers a specially designed 3-4 accumulator spring 12861-01 to restore the proper shift feel.

  • Restores proper shift feel.
  • Sonnax spring is the duplicate of the OE spring in the 47RE diesel application.
  • Improves shift quality
  • 12861 01 combo
  • 12861 01