Changing the gears in my suburban
I have decided to change the gears in my suburban (2008 5.3L 4sp auto), but not sure how much of a change to make. I currently have 3.73 gears, and was thinking 4.30 because 4.10 doesn't change much,...
Forum Discussion
Since only 2WD and you can DIY it, then it's certainly worth a try, if you don't like it you can change it back. Probably ought to add a trans cooler if you haven't already.
My only caution is that doing mods to make a 1500 tow better is a slippery slope. I went down this path with a 2000 Expedition until I came to the conclusion that I could spend as much money as I wanted but the truck would never tow like a 2500. Every mod helps a little, but you never seem to be quite able to get there. Lots of others here on the forum have reported similar experiences.
Not saying don't do it, just sharing some experience. To your question, I would go with the 4.30's, you should see a nice improvement. 4.56 is pretty deep and the truck will be screaming at highway speeds when not towing.
V-10 Excursion owners have reported that re-gearing from 3.73 to 4.30 really makes the truck a lot more driveable when towing heavy.
My only caution is that doing mods to make a 1500 tow better is a slippery slope. I went down this path with a 2000 Expedition until I came to the conclusion that I could spend as much money as I wanted but the truck would never tow like a 2500. Every mod helps a little, but you never seem to be quite able to get there. Lots of others here on the forum have reported similar experiences.
Not saying don't do it, just sharing some experience. To your question, I would go with the 4.30's, you should see a nice improvement. 4.56 is pretty deep and the truck will be screaming at highway speeds when not towing.
V-10 Excursion owners have reported that re-gearing from 3.73 to 4.30 really makes the truck a lot more driveable when towing heavy.
