Advance Adapters 712500A User Manual

ADVANCE ADAPTERS INC. P/N: 712500A

P.O. Box 247, 4320 Aerotech Center Way
Paso Robles, CA 93447 PAGE 1 OF 1
Telephone: [phone] Fax: [phone] Page Rev . Date: 10-18-12

LS SERIES GEN-3 AUTOMATIC TRANS

CONVERSION KIT (.400" RECESSED CRANK)

KIT CONSISTS OF:
No. Qty Part No. Description

1. 1 711500A MODIFIED FLEXPLATE

2. 6 716141A 11mm FLEXPLATE BOLTS

3. 1 716155A CRANK SPACER

GENERAL INFORMATION:

Since the LS series flexplate only fits a LS series block and the engine crank is recessed .400”, there are a few unique things
about the torque converter that bolt to the flexplate. The spacing of the flexplate from the back of the block is the same as
early GM blocks. The flexplate is dished out .400” to compensate for the crank. The difference comes into play with regard
to the bolt pattern of the torque converter to the flexplate and the snout length of the torque converter. A GM transmission
coupled to a LS series block has a longer pilot snout to compensate for the LS series crank and a different torque converter­to-flexplate bolt pattern than any other GM torque converter.

Two things are required when using a early transmission to a LS series engine. First, the stock flexplate must be drilled to
fit a common/standard style GM torque converter. Second is the snout length of the torque converter. The 716155A crank
spacer will compensate for the shorter engine crank.

Note: we have seen a few aftermarket torque converters that may require the crank spacer to be shortened slightly , It is very
rare and you would notice it by having a .100+/- gap between the flexplate and torque converter once the convert has been
pull forward from the transmission pump.

The only time that these items will not be an issue is when a customer is retaining the stock transmission that was coupled
to the LS series block. These parts will be necessary even on some new 4L60E transmissions with the removable bellhous­ing.

Optional Items:

P/N 717514 Stock manifold col-

lector rings and gasket kit.

Our kits include a new flexplate and it may not work on
all LS series engines.

The 6.0 engine with cast iron heads should only be used
with the stock automatic transmission because there is
no way of re-drilling the stock flexplate due to the dif­ferent crank stickout.

The 4.8 engine coupled only to a stock manual trans­mission in 1999 to 2003 does not have the recessed
crank. This kit can not be used this 4.8L engine.

LS7/LS9/LSA/LSX engines all have 8 or 9 bolts that
hold the flexplate to the engine crank. Our kit is not
compatibly with these engines.

SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the components
will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion, we strongly
recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter components.
We recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment. These manuals are
normally available at automotive dealerships and parts stores.