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73-87 Chevy _ GMC Trucks => Performance => Topic started by: 78chev2bnice on October 31, 2004, 01:05:00 pm
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I am having some fuel economy problems. 10mpg on a 350. I would like to put a 4 speed auto in my truck that currently has the turbo 350 in it and 3.08 gears. I cruise at 2300rpm. I know that it is possible to do this but I need some help.
1)I've read that there is transmission mounting problems and I would have to move the brace, is this true?
2)Something about the torque converter
3)drive shafts lengths, how long and could I steal on off a different truck.
4)How would I deal with the extra gear on the shift column.
5)Is it actually worth my time or should I just accept the fact that these trucks suck the gas down.
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If you go to www.northernautoparts.com you can get a lock up kit for the trans that will allow the trans to lock up the torque converter and shift into overdrive without a computer. The brace will have to be moved, but there may already be mounting holes. The shaft length will have to chanbe as well. I am unsure about the column.