I know there are some guys running excursion v10s on here with 4:30 gears was wondering if anyone started with 3:73s? Got a quote from a local shop for 1500 installed with factory gears in the rear and an aluminum cover for the rear. I thought it would be more so I think I am going to have him do it in November once the season is over I was looking for opinions. I am towing a Summerland 2670 around 7300 loaded and it tows ok but it's really hilly in NE Pa and I think 4:30 would help a lot plus I may go a little bigger in the future :) . Your opinions are appreciated. ThanksPaul

I say do it! While your at it, add a Dually kit. You would have one of the only Dually Excursions around.

I forsee a lot of subscriptions awaiting, as Paul Harvey put it, "The rest of the story".

To each their own I guess ... Yes you would notice it towing. Your mpg will suffer a tad but who cares you didn't buy a V10 for mpg to start with. Generally I'm not a big fan of adding things to my rigs that have no resale value. Vehicles already depreciate too fast as it is and now you're going to drop $1500 and never see it again. Maybe in the future if you found the right buyer you can squeeze out a little extra but doubtful. If it tows just fine now I wouldn't even bother. If towing is a problem then I would consider selling it and considering something new.

3.73 in a 4 speed v10 are not that great. They really make the truck lugg around. My V10 with 3.73's gets 10-11 ish mpg. Many with 4.30's report in the 13's-15's mpgs. Never mind the truck really wakes up for towing.

3:73 to 4:30 on Excursion V-10 | Good Sam Community

jspringator
Explorer
Sep 05, 2013
I went from 3.73's to 4.30's, but I'm towing 9,000 pounds. Have you tried towing with OD locked out? This may get you the responsiveness you seek at no cost. My load is so heavy I tow with OD locked out with 4.30's. I lock in the cruise at 58 mph for a stress free tow. I couldn't do that with the 3.73's because the RPM's were too low to pull the load. You are towing less weight. You may be able to increase your speed slightly (62) to keep it in the power band and avoid the downshifts I hated. I also have a 5 star tuner.
BigToe
Explorer
Sep 05, 2013
jspringator wrote:
I lock in the cruise at 58 mph for a stress free tow. I couldn't do that with the 3.73's because the RPM's were too low to pull the load.

This is the KEY to what experienced people who tow have been preaching about with respect to tires sizes, differential gears, and transmissions.

I lock in the cruise at 55 mph, with 4.88 gears (stock) and the stock tire size, so that I can utilize all four gears of the transmission under load. And, the speed limit while towing is 55 anyway.

(I'll never understand why some people tow trailers at 75 mph).
dodge_guy
Explorer II
Sep 05, 2013
55 and 58 mph is too slow for me. my X performs best when it is at 65-67mph. with the 3.73`s it was just a few hundred rpm low before the sweet spot in the rpm range. the 4.30`s brought everything in where it feels best for me.

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3:73 to 4:30 on Excursion V-10

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