4BD Conversion Kit
All the parts you will
need to adapt an
Isuzu 4BD engine
to an NV4500 transmission
are included in this kit.
It is assumed that you have some basic knowledge of
automotive repair, and that you have excepted any and
all liabilities for the use of this kit, including but not
limited to Federal and Local laws regarding emissions
and other regulations.
Parts list
1 Adapter Plate
 1 Clutch disk
 1 Pilot bushing
 1 Clutch alignment tool
 6 grade 8 bolts
 10 grade 8 self locking nuts

Installing the adapter plate
to the bellhousing
Once you have centered the plate
with the bearing retainer then you can
tighten the 6 countersunk bolts
Once you have the plate bolted to the bellhousing then you can install
it onto the transmission using the original transmission bellhousing
bolts and the 4 nuts included in the kit. Don’t forget to reinstall the
bearing retainer to the transmission first.
Install the throw out bearing onto the bearing retainer tube and the
fork arms. Both spring clips must be under the fork and the fork must
be caught on the pivot ball.
Leave the OEM bearing installed. It is behind the
flywheel and CANNOT be removed without pulling
the flywheel. Install the included pilot bushing by
simply inserting it into the flywheel be sure to seat
it with a bushing driver and hammer. Add some
high temp grease if you like, the bushing has some
oil embedded in it from the mfg.
Once you have the bushing installed, you can install the clutch disk and pressure plate. Begin by
installing the disk on the included alignment tool, flat side forward. Then insert the alignment tool into
the bushing that you just installed in the flywheel. Once the disk is in place, you can install the
pressure plate over the disk, making sure that you place the guide pins into the center of the three
holes. Making sure to check that the disk is centered as you tighten the pressure plate. It will save
you a lot of frustration as you are trying to get the transmission installed on the engine if the disk is
dead center.
Now you are ready to install the
transmission onto the engine.