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4LHD/4LHDX Application Manual
Powertrain Control Solutions
REV 1.1
Dimension A: Rear face of engine to torque converter mounting lug.
Dimension B: Rear face of engine to explate.
The explate shown above is PCS part number TRN7007, reference Section 2.1.2 in this document or the PCS OEM
Parts Catalog for more information.
The dimensions provided indicate the installed depth of the torque converter. The tolerance is +/- 0.062”.
Every installation must have the converter pull-out measured and veried before the vehicle is operated. Improper torque
converter pull-out will result in transmission malfunction and/or damage.
To measure the Torque Converter Pull-Out:
1. Align and install the bellhousing/transmission assembly to the engine. Before tightening the bellhousing fasteners
completely, check to be sure converter rotates freely.
2. Once the bellhousing fasteners are torqued to specication, push the torque converter back into the transmission as
far as possible.
3. Using feeler gauges or calipers measure the gap between the explate mounting surface and the torque converter
mounting pads. If the gap distance is between .060” (1.5mm) and .187” (4.7mm) it is OK to bolt up the torque converter.
Reference Section 2.1.3 for a more detailed description of this verication process.
Bellhousing Converter A B
GM LS
258 mm 36.7 mm (1.446”) 25.7 mm (1.012”)
300 mm 21.7 mm (0.854”) 10.7 mm (0.421”)
PCS SAE3 & SAE4
258 mm 49.4 mm (1.944”) 38.4 mm (1.512”)
300 mm 34.4 mm (1.354”) 23.4 mm (0.921”)