#EARLY 6.0 CHEVROLET TRANSMISSION BOLTUP DRIVER#
#EARLY 6.0 CHEVROLET TRANSMISSION BOLTUP SERIES#

This is the LS bellhousing mounting flange pattern. It gets even stranger with the Gen V LS engines with yet another change to this pattern, but weвЂ™ll leave that alone for right now. This identifies the transmission as intended for an LS engine.

#EARLY 6.0 CHEVROLET TRANSMISSION BOLTUP DRIVER#

The LS version bellhousing bolt pattern is skewed with four attaching bolts on the driver side with a bolt at the 12 oвЂ™clock position and only two bolts on the passenger side. A small-block Chevy bellhousing bolt pattern has six attaching bolts that are laid out symmetrically with three on each side and no bolt hole at the 12 oвЂ™clock position. One way to tell is to look at the bellhousing flange. If your transmission is a 2002, then likely it is designed for an LS engine. This engine will require an earlier overdrive 4L60E transmission designed for a small-block Chevy. Now, if the engine you are using is a traditional small-block Chevy that was still available in certain Chevrolet and GM vehicles like Suburbans and trucks, then this is an entirely different ball game. Stock LS engineвЂ™s flex plate and everything will work. On the other hand, if you are using a 1999 4.8L or 5.3L truckД®ngine for this rat rod, then that 2002 4L60E automatic will bolt up using the Room for this transmissionвЂ™s torque converter if you attempt to bolt this trans That was essentially flush with the bellhousing flange. Then that trans was designed for engines using the traditional LS crank flange Transmission used in Camaros, Corvettes, and also light duty pickups. By doing this, GM employed a flat flex plate and this allowed the 4L80EвЂ™s torque converter hub to nestle directly in the extended 6.0LвЂ™s crank flange and using a flat 6.0L flex plate.ДЄssume that the 2002 automatic you refer to is a 2002 LS version 4L60E The longer crankshaft flange on the early 6.0L engines were employed to essentially duplicate the crankshaft flange position of the earlier small- and big-block Chevy engines that the LS replaced. GM used this different crank flange to adapt the 4L80E four-speed automatic transmission that had earlier been designed for use behind big-block Chevys.

#EARLY 6.0 CHEVROLET TRANSMISSION BOLTUP SERIES#

The iron-block 6.0L LQ4 truck engine found in the larger 2500 series trucks and some vans used a 0.400-inch longer crankshaft flange that protruded from the engineвЂ™s rear cover. The 4.8L and 5.3L engines used a crankshaft flange that was essentially flush with the block bellhousing flange which is identical to the Corvette and Camaro 5.7L all-aluminum LS1 and LS6 engines in that year. So weвЂ™ll deal with both applications but for the benefit of future questions for this column, more detailed information in the question creates a better answer.ДЇirst weвЂ™ll deal with the LS (Gen III) engines. However, there are many situations in this changeover year where the small-block was used in several GM heavy-duty vehicles. Our first assumption is that we are talking about a 1999 LS engine and not a small-block Chevy. The quick answer to your question is - it depends! Jeff Smith: We will have to make several assumptions to answer your question.

Will a 2002 Chevy transmission work behind a вЂ99 Chevy motor? Is wiring or computer an issue? I work at a junkyard and the interchange says one year only. This is contrary to all other Gen III LS engines where the crankshaft flange is even with the rear of the block. Note that it protrudes from the rear of the engine block by 0.400-inch. This is what the 1999 iron LQ4 6.0L engine crankshaft flange looks like.

Early 6.0 chevrolet transmission boltup