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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: mcfries75 on September 25, 2006, 03:20:00 pm

Title: Tranny??????
Post by: mcfries75 on September 25, 2006, 03:20:00 pm
What transmission can I put in my 1977 Dually with a 454

Title: Tranny
Post by: RSBAD454 on September 25, 2006, 04:21:00 pm
That would be a TH400 if the truck was already automatic equipped....or if your budget permits, you can run the 4L80E.8)  

Title: Re: Tranny
Post by: mcfries75 on September 29, 2006, 04:15:00 pm
Is the 4L80E an overdrive transmission and it will swap out with not much of a hassle?  The tranny I have now works fine but it is only a 3 speed and it has a shift kit on it and it is kind of hard to tow my trailer with it.  I am trying to fiugure out a better and smoother ride with the trailer.

Title: Re: Tranny
Post by: VileZambonie on September 30, 2006, 06:48:00 am
The 4L80E requires a computer to shift. Aside from the computer, inputs are needed such as TPS, MAP, RPM, BARO, etc so if you are running a carb you'll have to use at the very least a feedback style TPS carb or rig something up. The harness etc, not just a drop in