Chevrolet Performance LT4 E-ROD Directives D'emploi page 10

Pilot Bearing
A pilot bearing must be installed in the rear of the crankshaft. The pilot bearing aligns the transmission input shaft with the crankshaft centerline. A
worn or misaligned pilot bearing can cause shifting problems and rapid clutch wear. There are two different Chevrolet pilot bearings for the LT4.
14061685 is for a long input shaft transmission and 12557583 is for a short input shaft transmission. Verify fit prior to installing the transmission or
damage may occur.
Brake vacuum port
An auxiliary vacuum pump may need to be purchased to ensure proper operation of power brakes - if used. The LT4 engine may not produce adequate
vacuum to support power brakes under all operating conditions. Several different electric vacuum pump configurations are available from your local
dealer. Please see Corvette LT1 (2014 and newer) and Corvette LT4 (2015 and newer) or Cadillac CTS-V LT4 (2016 and newer).
VACUUM PORT FOR BRAKE
BOOSTER
LT4 E-ROD Instruction Sheet
PURGE SOLENOID
PART No.
REV 04DE19
19370613
SHEET
10 of 83