R154 Swap Whine Noise - Internally Destroyed Transmission (Run Without Oil)

Transmissionadvanced✓ OP Confirmed

Problem

After an R154 transmission swap, a consistent whining noise was present whenever the clutch pedal was released, both in neutral and in gear.

Constant whining noise from transmission areaNoise present only when clutch pedal is released (foot off pedal)Noise occurs in both neutral and all gearsNoise disappears when clutch pedal is depressed

Root Cause

The R154 transmission was internally destroyed. The previous owner had run the transmission without oil, causing severe heat damage. The input gear on both the counter shaft and input shaft were blackened from heat and nearly completely stripped.

Confidence

High confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted March 2025 on SupraForums.com