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01spirit750 · 10-07-2011, 12:23 PM

My opinion (you know about opinions right?) is that the 700r4 is too weak for a truck. I am running a turbo 400 and I will be upgrading it to a 4l80E.

The 4l80E is a update of the turbo 400 and they added over drive.

The problem with a 4l80e is that it is a computer control transmission so you have to get a standalone computer. Some guys use a computer out of an early desiel or you can get the TCU control from FAST (Fuel Air Spark). They run about $600. Also the 4l80E has no mechanical speedometer connection. The 4l80E also requires a throttle position sensor.

10-07-2011, 12:23 PM	#2
01spirit750 Registered User Join Date: Oct 2010 Location: Bay Area California Posts: 137	Re: What transmission to change to??? My opinion (you know about opinions right?) is that the 700r4 is too weak for a truck. I am running a turbo 400 and I will be upgrading it to a 4l80E. The 4l80E is a update of the turbo 400 and they added over drive. The problem with a 4l80e is that it is a computer control transmission so you have to get a standalone computer. Some guys use a computer out of an early desiel or you can get the TCU control from FAST (Fuel Air Spark). They run about $600. Also the 4l80E has no mechanical speedometer connection. The 4l80E also requires a throttle position sensor.