3.42s to 4.10s....pros and cons

[BogeyBoy82]

I'm tired of my truck being a dog off the line. My old TBSS had 4.10s (and a lot more power lol) but had so much more giddy up from a dead stop. I'm really considering doing 4.10s and a tune. I thought 3.73s but that probably won't be enough of a difference to feel anything.

Thoughts on a 4.10 swap in a 5.3 2008 from 3.42.

How much are the MPGs gonna go down and how much is the performance feel gonna go up? Any other downsides? I do about 70/30 city/highway driving and never go over 90

 

[iwaslowr]

Do you have 4L60 or 6L80 transmission?

 

[BogeyBoy82]

4L60. Truck is an 08 with 50k miles on it.

 

[Sancho]

Depends on your highway driving, really. The Tahoe I just test drove was an '08 with the 3.73's and felt adequate around town and sat at 2k rpms at 70mph. Not sure how much the 4.10s would change that, but there's some 3.73 info that may be helpful to you. If I had a ton of highway driving to do, I think I'd stick with that combo.

 

[iwaslowr]

Do you have 4L60 or 6L80 transmission?

Edit: Does the truck have any performance enhancing modifications? A CAI, exhaust and BB tune improved my Yukon's drivability including rate of acceleration. Something as drastic as a gear change would be last resort for me personnaly due to the overall impact to gas mileage, but that's just my .02

 

[BogeyBoy82]

I've got a CAI sitting in my garage ready to install. I'm gonna do a BB tune as well but thought about doing this in combination with the gears to kill the speedo calibration bird at the same time

 

[Sierkonblazer]

I would start doing the easy mods before you do something as drastic as a gear swap. What your probably feeling is the torque management. Once you get a tune and remove that crap, it'll feel like you just picked up 50hp..

 

[BogeyBoy82]

I'll try the CAI and the BB tune and see where that gets me. If that don't do the trick I'll 4.10 swap it. If that doesn't do the trick it's getting sold or supercharged. I don't need a bat outta hell but I need something more than a butterfly outta hell

 

[Modded]

This http://www.ebay.com/itm/2009-CHEVY-...&fits=Model:Tahoe&vxp=mtr&hash=item19cfb55020 + this http://www.ebay.com/itm/2007-2012-C...&fits=Model:Tahoe&vxp=mtr&hash=item3373d4a2ab will solve your speed needs!!
It will also make your wallet pretty sad though!

 

[johnsoex]

Get one, you won't regret it!