Lingenfelter Harrop GTO Short Throw Shifter MT - Manual

T56 Tremec 6 Speed GM Short Shifter Fitting Guide.
Thank you for purchasing our Harrop Short Shifter assembly.
Whilst the fitment of this assembly is not difficult, it should be approached with care and by a competent mechanic or
automotive technician. These instructions are a guide only, and may be altered or reviewed at any time. If you find a more
convenient fitment process, we would gladly like your input.
This document is offered only as a guide, and no liability (direct or consequential) is implied or accepted by Harrop
Engineering. We gratefully acknowledge Holden for allowing us to use the images shown below.
Fitting Guide.
Raise vehicle, preferably on a “drive-on” hoist or a four post hoist. This preference is based on the fact that the
transmission is very heavy and the use of a transmission jack will be required.
Inside the vehicle, remove the gearshift knob by with the fingers of one hand hooked
under the edge of the gearshift lever boot as shown, carefully release each of the 8
plastic retainers and free the gearshift lever boot from the console cap. NOTE: The
gearshift lever knob and console boot are manufactured as a single component. Do not
attempt to remove the gearshift lever knob separately to the boot.
Lift the gearshift lever boot enough to enable a firm grasp to be made on the gearshift
lever with the left hand, then grasp the gearshift knob with the right. While rocking the
knob sideways, with an upward force applied, dislodge the knob retaining claws from the
lever. Remove the gearshift lever knob and boot assembly from the gearshift lever.
Remove the rubber cap from the transmission console and remove the two screws from
the transmission console next to the power socket. Carefully prise out the transmission
console, disconnecting the power window harness where fitted.
Slip the insulator sock from the control lever.
Using a 10mm socket, remove the two bolts securing the control lever to the remote
shifter shaft, then lift the control lever free.
From under the vehicle, remove the four bolts securing the remote shift lever boot to the
floor pan. Scribe around each of the transmission support cross-member mounting
points to the vehicle under-body, to provide an alignment reference for reassembly.
NOTE: This step is critical to the correct power-train alignment on reassembly. If not
carried out, then vehicle vibration and/or handling problems may result.
Support the transmission with a suitable lifting device, then remove the four engine rear
cross-member to side
frame attaching bolts.
Remove the four exhaust
to catalytic converter
bolts. Slowly and
carefully lower the
transmission to obtain
access to the top of the
gearbox.