MX-RV wrote:
I've always been on the look out for something to improve mileage when unloaded. I've looked at tuners, cold air intakes, tire changes, and rear end swaps. But I've never seen one of these before. I'm in the process of a vehicle upgrade I'm looking at several a 5.3l 1500 suburban with the 6speed Allison, a 2500 burb with 6.0l and 6s Allison, a ford Xc with 7.3l psd. As it will be a daily driver the best fuel economy when not towing is important. But for best bang for your buck is something with towing improvements would be nice. Does any one have any experience with these. Everything has a draw back what is it with these.
Thanks b
It doesn't really matter as they are good gearboxes anyhow but the 6-speeds in the Suburbans aren't Allisons.
I wouldn't let that bother you though as they are probably every bit as good as an Allison.
