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4LHD/4LHDX Application Manual
Powertrain Control Solutions
REV 1.1
1.1.3 Gear Ratios
Gear Ratio
1st 3.059:1
2nd 1.625:1
3rd 1.000:1
4th 0.696:1
Reverse 2.294:1
1.2 Physical Specications
1.2.1 Mass Properties
Transmission Mass As Installed
4LHD/4LHDX 75 kg (165 lbs)*
Bellhousing Mass As Installed
GM Gen III 4.9 kg (10.8 lbs)
C6 Replacement 5.2 kg (11.5 lbs)
SAE3 5.2 kg (11.5 lbs)
SAE4 4.5 kg (9.9 lbs)
SAE5 7.3 kg (16.1 lbs)
Extension Housing Mass As Installed
GM 2WD 1.8 kg (4.0 lbs)
GM 4WD 2.4 kg (5.3 lbs)
PCS Parking Brake 10.2 kg (22.5 lbs)*
C6 Replacement 4.3 kg (10.1 lbs)**
Accessory Mass As Installed
Transmission Harness 0.7 kg (1.6 lbs)*
Dipstick Kit 0.4 kg (0.9 lbs)
Heat Shield Kit 0.4 kg (0.9 lbs)
Controller (TCM) 0.3 kg (0.7 lbs)
TCU Bracket Kit 0.5 kg (1.1 lbs)
Overow Vent Kit 0.2 kg (0.5 lbs)
Flexplate Kit 1.8 kg (4.0 lbs)
Flywheel Adapter 8.8 kg (19.4 lbs)**
* This can vary +/- 3kg (6.6lbs) based on torque converter and output shaft
* Mass measured without drive shaft ange
** Mass measured without C6 brake housing and drum brakes
* This can vary +/- 0.3kg (0.7lbs) based on vehicle application
** This can vary +/- 4.0kg (8.8lbs) based on ywheel application
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