Lingenfelter L380xx1410 Lingenfelter Camaro Cast 241 MM Aluminum Differential 2010-12 v1.9 - Manual (Page 21)

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68. Using an inverted E18 Torx socket,
ratchet and a 21mm wrench, install the front
mounts to the driveshaft with the stock mounting
bolts and nuts. Be sure the driveshaft coupler is
in place as well. These bolts and nuts are torqued
to 67 ft-lbs.
69. Using an 18mm socket and ratchet, install
the driveshaft to the differential using the supplied
5/16-24X1.3 bolts and U-joint straps. The bolts
should be torqued to 18 ft-lbs.
20.
70. Using a 10mm socket and ratchet,
re-install the front heat shield.
71. Re-install the exhaust front pipe clamps.
Be sure the clamps are secure and sealed.