More power!
#1
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So I've had my 91 G2500 for 7 or 8 years now. In that time the 700R4 transmission burned up, and has been replaced by a 4L80E. To do this I repinned the PCM, harness, adding the transmission harness and swapped in an PCM from a 1994 G30. Also had to do some fabricating to make the transmission crossmember, shifter and driveshaft work. This has worked fine for going on 4 years now.
Last month towing my Jeep (Jeep plus trailer weigh in at right around 7000 pounds) over some Pennsylvania mountain passes I realize the TBI 350 is woefully underpowered to do this. It is fine in Ohio, and has been okay in the WV mountains (on I77, nothing steeper than a 5% grade. But it starts to complain at 10% grades, and 12% was pedal to the floor going 15mph.
As far as I can tell, the TBI 454 uses the same engine mounts, same bellhousing bolt pattern, and same computer. The only difference I believe is larger fuel injectors.
Is this swap really this simple? Or am I missing something.
On a sidenote, how does the engine come out? Disassemble the front of the van and out the front? Unbolt the crossmember and out the bottom?
Last month towing my Jeep (Jeep plus trailer weigh in at right around 7000 pounds) over some Pennsylvania mountain passes I realize the TBI 350 is woefully underpowered to do this. It is fine in Ohio, and has been okay in the WV mountains (on I77, nothing steeper than a 5% grade. But it starts to complain at 10% grades, and 12% was pedal to the floor going 15mph.
As far as I can tell, the TBI 454 uses the same engine mounts, same bellhousing bolt pattern, and same computer. The only difference I believe is larger fuel injectors.
Is this swap really this simple? Or am I missing something.
On a sidenote, how does the engine come out? Disassemble the front of the van and out the front? Unbolt the crossmember and out the bottom?
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