Specifications

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identifying the stock transmission (1941-79)
Between the years of 1961 & 1973, Warner Gear made several variations in the design of the input shaft
in relation to the length and tooth count. When adapting this transmission to a V6 or V8 engine, it is critical
that your transmission be equipped with the correct length of input shaft. The only vehicles that would have
the correct input shaft length would be Scouts equipped with a 6 cylinder engine. The stickout length of this
input shaft from the face of the transmission should be 9 to 9-1/2". If your transmission has a shorter shaft,
you will need to change the input shaft. The correct input shaft has a clutch size of 1-1/8” 10 spline (same
as the Chevy clutch disc).
Chevy Engine to Scout T90 Ford Engine to Scout T90 Buick V6 Engine to Scout T90
712502 Adapter Plate 712505 Adapter Plate 712502 Adapter Plate
713001 Motor Mounts 713002 Motor Mounts 713011 Motor Mounts
Optional Items:
716014 Input Shaft 716014 Input Shaft 716014 Input Shaft
716640 Clutch Linkage 716640 Clutch Linkage 716640 Clutch Linkage
716176 GM Release Arm CF360030 10” Pressure Plate 712581 Buick Bellhousing
CF360056 10-1/2” P.P. 383303 10” Clutch Disc CF360056 10-1/2” P.P.
383271 10-1/2 Clutch Disc CF260000 11” P.P. 383271 10-1/2” Clutch Disc
CF165552 11” P.P. CF360049 11” P.P. CF700010 Flywheel (231 V6)
383735 11” Clutch Disc 383735 11” Clutch Disc N1430 Release Bearing
N1430 Release Bearing 716311 Release Bearing
If your T90 was originally fitted to a 4 cylinder, you will be required to purchase a 6 cylinder style input shaft, P/N 716014 (Jeep
#906203). This shaft has a gear tooth count of 18 teeth. On most Scouts, the input shaft that you are replacing will be 16 tooth. On
these applications, you will also need to purchase a new cluster gear, P/N 716018. Below we have listed the years and gear data
that will be necessary to determine your vehicle requirements. The best way to determine what your vehicle is equipped with is to
simply remove the top cover and count the teeth on the front input shaft.
SCOUT CONVERSION NOTES:
The Chevy small block is a great choice for these vehicles. When replacing a 304 or 345, a Chevy small block is 200 to 300 pounds
lighter. It provides you with a proven, dependable engine. Part cost & availability is better, and a lighter and more efficient Chevy
engine will give you an estimated 2 to 6 more miles to the gallon. Scout engines are generally overlooked by the aftermarket industry
with reference to performance parts. The internal engine components are also becoming increasingly more difficult to find - making
a Chevy engine your best choice.
We offer a complete line of bellhousing adapters to couple a Chevy engine to the various stock Scout transmissions; however, a
new transmission like a TH350 or TH400 are great options due to ease of installation. The Chevy TH350 or TH400 eliminates the
clutch linkage connection issues that exist with the Scouts. Driveline modifications
are normally required when doing an engine and transmission swap.
Motor mounts for the Scouts are a weld-in style. When retaining a stock
manual transmission, engine placement may be different than when
installing a new Chevy automatic transmission. When installing a
Chevy automatic, the new center line of our motor mount should
be approximately 3” rearward of the center line of the stock Scout
V8 mount. This measurement is approximate, not exact. Please
check for proper engine clearances before finalizing the new
engine placement.
SCOUT SPECIALITY ADAPTERS:
We manufacture an adapter to retain the stock I.H. 345 V8 block and couple a GM automatic transmission
to it. This adapter kits are manufactured by Advance Adapters but sold through I.H. Only North. The bellhousing kit has the aluminum
adapter plate with a aluminum torque convert adapter ring plus the hardware.