4L80E information, swap information, and diagrams
Below are some exploded diagrams illustrating the various parts and functions concerning the 4L80E.
(Some of these images are oversized. Due to the limitations of this blog theme, they are being cut off. If you would like to view the entire image, simply click on the picture and they will open up through my photobucket account.)
Adapting a 4L80E to NP149
Alright, so I want to run a 4L80E transmission and a NP149 transfer case. The 4L80E is a much stronger transmission and the NP149 is an AWD transfer case.
The 4L80E came in 3/4 ton and up trucks for many, many years. The NP149 came in the Silverado SS, Cadillac Escalade, and Yukon Denali.
Unfortunately, none of the trucks that had the 4L80E came with a NP149. So there are two different ways to overcome this. You can either turn down the output shaft on the transmission or replace the input shaft on the transfer case.
I plan on replacing the input shaft.
Reason being, is that the turned down output shaft is prone to failure in high horsepower applications. The transfer case input shaft, on the other hand, has proven to take the abuse of over 1200 horsepower!
These adapters are for sale by a fellow named time2kill on SilveradoSS.com.
Yank Torque Converter
I was going to just run the stock 4L80E torque converter. Knowing that my supercharger starts to build it’s power at the 3000 rpm range, when I came across a SC3000 Yank torque converter, I bought it.
A 3000 stall torque converter seems like it would be way to tall for street use. Everything I’ve read says that prochargers love high stalls though. Some folks even run a 3600 rpm stall on the street!
Here’s a link to my torque converter on Yanks site.
Yank SC series torque converters
Here are some pics of my Yank torque converter. As you can see, it looks brand new! That’s because the seller shipped it off and had it rebuild and then immediately shipped it to me. He never even opened the box!
Yank it and get it off quicker!
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You gotta start somewhere. How about a little backstory and the plan for Charlie?
Okay, you’ve gotta start somewhere. I bought my 2000 Silverado in the fall of 2010. About 3 years ago I had a 2002 Silverado. I traded it off with the the big gas mileage hike and got a SRT-4. A year later, I started carpooling. The SRT-4 was so loud, that I convinced myself that I needed something quieter. A friend of mine suggested taking a look at Volvos. I ended up with a S40 T5 AWD. I loved the car, but quickly found out that it costs quite a great deal of money to mod a Volvo. The S40 was simply stuck at factory settings. About a year after I bought the Volvo, I realized that my family could really use a truck and quite honestly, I missed my Chevy.
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Project "Charlie Murphy" 