2013 YukonXL 2 speed Transfer case change to 1 spd

1stYukonXL said:

I'm looking at what's involved to change from the 2 speed transfer case in a 2013 to a single speed and/or changing the existing 3.48 rear end gears to 3.08 for better milage. Anybody had any experience or advice with this?

Click to expand...

PG01 said:

Depends on settings on your account
You can set it for email notifications

Click to expand...

PG01 said:

Depends on settings on your account
You can set it for email notifications

Click to expand...

wjburken said:

The transfer case has nothing to do with gear ratio. If you simply want to change your gear ratio, you need to change your front and rear differentials.

Do the math on your fuel savings. If dropping down to 3.08 gears lets you go from 19 mpg to 21 mpg, if you drive 20,000 miles a year, that’s a savings of about 100 gals. At $4.00/gal that’s only $400 a year. If you spend $1000 or more on the conversion, you won’t see any savings for almost 3 years. If you drive fewer miles; the longer it will take to pay yourself back.

Click to expand...

j91z28d1 said:

if you're looking for a cheap. parts truck. the hybrids all but the first year's Cadillacs have a 3.08 gear axle front and back. it's the smaller sized ring and pinion rear end so you would technically lose some tow rating if you have the larger one now, but if you don't max tow often, not a huge deal.

I have seen deals where the owner is traveling and something hybrid related goes out, no local shop will work on it for them and towing them home is more hassle than it's worth. I've seen them non running for 500$.

keep an eye on Facebook and Craig list, they pop up for cheap non running. if you have place to store the parts, there's a small demand for enough of the discontinued hybrid parts that you might make a profit off the parts and get the 3.08 axles for free.

things like brake masters and controls are impossible to find new, modules and the like wouldn't take up much room and list on ebay. transmission are rare and used is about the only option.


just a thought. I would be interested if you see any mph increase

Click to expand...

1stYukonXL said:

Thanks for all your input! I'm up in Canada so might be a little different senecio? So aftermarket companies don't sell new parts for 2013 Yulo XL's etc.?

Click to expand...

intheburbs said:

Crunch the numbers. As others have said, you'll see a ROI of at least 5 years, if not more. Never mind the fact the price of gas is likely to go down in the upcoming years.

Click to expand...