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2002 ex v10 with 20x10 wheels And 37 tires has only 370 gears, I feel that on the up hills it's going as fast as the semis, any help? I have someone selling a 455 gears, would that help?
When you say 4.55 that concerns me. Make sure they are the right gear set for your axle. The common ratios for your Sterling 10.5 rear axle are 3.73, 4.10, 4.30, and 4.56. If you go any lower than 4.56 I think you need a new carrier. And remember if you are 4x4 you need to do this in the front axle too.
I would probably be more inclined to go with a 4.88. As stated around here V10's should have come with a 4.30 from the factory. They really help in the towing and around town driving. A 4.88 ratio will put your effective ratio just below the sweet spot and give more low end power off the line. See the calculations below.
2002 ex v10 with 20x10 wheels And 37 tires has only 370 gears, I feel that on the up hills it's going as fast as the semis, any help? I have someone selling a 455 gears, would that help?
If your 37" tires are actually 37" tall then with your current 3.73 gear ratio your effective ratio (effectively reduced due by 37" tires vs the factory 31.5" tires) is 3.18 and that will put a lot of unwanted strain on the trans.
4.56 gears would move your effective ratio (with those 37" tires) to 3.88, just a whisker better than the stone stock setup but in reality not as good because of the added extra weight and rotational mass of the now much larger tires.
4.88 gears would move the effective ratio to 4.15. This should put you at a slightly improved performance curve from the factory setup as far as acceleration, hill climbing and towing.
5.13 gears would get the effective ratio to 4.37. This would be the best setup if you do any heavy towing or serious off roading. The V-10 loves to rev and it is actually more efficient at those higher revs, my towing economy was improved by 20% when I went from 3.73 to 4.88 gears. The 4.30-ish ratio is a great all round match for the mighty V-10.
If you are going to spend the money to regear (a very wise decision with 37" under a V-10!) then make the best choice for how you use your rig.
Thanks to all the reply's, so it's decided that 4.88's it's the way to go. I don't tow, however wife is deciding on a small trailer to put our camping gear and a tent. This is by far the best forum, you all are great! Thank you.
I think the 4.88 will be a very nice gear. Right in between the stock 3.73 and 4.30. That is the ultimate ratio I would like to be at especially for highway and some towing use.
It increase your RPM by 31%. So if you now are at 1500 RPM after changing from 3.73 to 4.88 you will be at 1962 RPM. If with the 3.73 ratio you now run at 2000 RPM you will run at 2616 with the 4.88.
I agree with the 4.88 gears, I've done a lot of research on which gearing I should go with on mine, and ultimately ended up buying the 4.88s, I will be installing them this coming week and will be taking time lapse video of the entire swap. Really looking forward to what it has in stock!
I agree with the 4.88 gears, I've done a lot of research on which gearing I should go with on mine, and ultimately ended up buying the 4.88s, I will be installing them this coming week and will be taking time lapse video of the entire swap. Really looking forward to what it has in stock!
My Ex has the 3:73s. I understand that going to 4:88 makes a big difference , but what does it do to RPM on the highway?
Matt, When I had the 32" tires (vs stock 31.5"s) and my 4.88 gears the EX felt like a hotrod for those 2 years, seriously improved off the line and rolling acceleration. And it towed like a freight train. With about the same mix of unloaded city/highway driving the mileage went from the stock 14-ish down to 12-ish with the deep gears. The towing mileage actually improved with the deep gears from 6/7 to 8/9 MPG. It was fun but in my opinion 4.88 and stock sized tires is maybe a tad too deep, 4.56 with factory or near tire size would be a better choice if looking for a step up from the great 4.30 ratio behind a V-10. Currently with my 35.28" tires and 4.88s the effective ratio is 4.39 and the all round drivability and towing performance is noticeably improved over the stock 3.73 setup.
I took these notes the day I upgraded to the 35"s, RPMs are from the Ultra-Gauge and the speed is from a GPS.
Speed........RPM w/32"s.........RPM w/35"s.
50.............1930...................1720
55.............2075...................1900
60.............2280...................2055
65.............2430...................2230
70.............2597...................2400
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