B&M 120001 SHIFT PLUS 2 TRANS CONTROLLER - Manual (Page 17)

Additional 4L60E/4L65E Notes
Header / Exhaust Clearance
There are several different bellhousing configurations for the 4L60E/4L65E transmission. The earlier models (1993-
1996) have an integral bellhousing identical to the 700R4. In some cases, the dust cover mounting ears will have to
be cut off to accommodate header collectors. This can easily be accomplished with a hacksaw. The later models
(1996-later) have a fully circumferential, bolt-on bellhousing. It is important to use the correct bellhousing for your
application. The LS1-style 4L60E/4L65E transmissions have a unique bellhousing and input shaft. These types are
not direct replacements for the non-LS1 applications.
Some headers will interfere with the starter hump on the bolt-on bellhousings. It may be necessary to either dimple
the header or cut off the starter hump.
Starter Clearance
The bellhousing may require modifications if you intend to use a stock starter.
Shift Lever
Many 1996-later, two-piece case transmissions (primarily trucks) have a shift lever that is about 1" longer than the
early-style found on 700R4, TH350 and TH400.
Cooler Lines
Your existing lines may have to be bent to connect to a 1996-later, two-piece case transmission. These units have
fittings that are parallel to the ground instead of being angled down. You may also need to change the case fittings
as many 1996-later transmissions are equipped with the factory quick-connect style.
NOTE: Do not use Teflon® tape if replacing cooler fittings. It can cause the case to crack due to over tightening.
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