regearing input

[dinosore]

So I got 92 3.0 2wd ranger. I got it on 2" leveling coils and 235/75's. Currently it has 3.45 gears and is a slug the whole way around but whos gunning it on the freeway any ways? Long story short I take this truck out for climbing/camping. Im pedal to the floor in 4th to get through hill spots getting in and out of desert canyons/valleys. I have been planning on going to 3.73's to help with the lift and tire size change, however long term I plan on throwing a camper shell on the bed...should I just jump to the 4.10? Or will the 3.73 hold up even with a camper on? Or should i go even one step up from the 4.10 if im throwing a camper shell on? Thanks all for your thoughts and input on this one.

 

[Earl43P]

Camper shell weight/drag is insignificant.
Mine actually gets better hiway mpg with the hi-rise cap on.

I vote go straight to 4.10s.


My 2000 3.0 4wd MO5D regularly gets over 360 hiway miles per tank (19.5 gal tank, usually put about 18 gal in). I typically don't use 5th gear unless I'm over 60 mph. Gets BETTER mpg that way (trust me, I bought it new). The only real change I made is 235/65-16 tires, which are somewhat smaller than the stock 245/75-16s that it came with.

The smaller tires do log more miles than actual, I believe the change was 8.7%.

times.

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DML Tire and Wheel Calculator Results

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Dimensions

Dimension Tire A: 245/75 R 16
(30 x 9.65 x 16) Tire B: 235/65 R 16
(28 x 9.25 x 16) Difference
Width
Sidewall height
Overall height
Circumference
9.65" (245.00mm)
7.23" (183.75mm)
30.47" (773.90mm)
95.72" (2431.28mm)
9.25" (235.00mm)
6.01" (152.75mm)
28.03" (711.90mm)
88.05" (2236.50mm)
-0.39" (-10.00mm)
-1.22" (-31.00mm)
-2.44" (-62.00mm)
-7.67" (-194.78mm)


Speedometer Error

Actual Speed Indicated Speed with Tire B Speedometer Error
5 mph (8.04 kph) 5.44 mph (8.75 kph) +0.44 mph (+0.70 kph)
10 mph (16.09 kph) 10.87 mph (17.49 kph) +0.87 mph (+1.40 kph)
15 mph (24.13 kph) 16.31 mph (26.24 kph) +1.31 mph (+2.10 kph)
20 mph (32.18 kph) 21.74 mph (34.98 kph) +1.74 mph (+2.80 kph)
25 mph (40.23 kph) 27.18 mph (43.73 kph) +2.18 mph (+3.50 kph)
30 mph (48.27 kph) 32.61 mph (52.47 kph) +2.61 mph (+4.20 kph)
35 mph (56.31 kph) 38.05 mph (61.22 kph) +3.05 mph (+4.90 kph)
40 mph (64.36 kph) 43.48 mph (69.97 kph) +3.48 mph (+5.61 kph)
45 mph (72.41 kph) 48.92 mph (78.71 kph) +3.92 mph (+6.31 kph)
50 mph (80.45 kph) 54.35 mph (87.46 kph) +4.35 mph (+7.01 kph)
55 mph (88.50 kph) 59.79 mph (96.20 kph) +4.79 mph (+7.71 kph)
60 mph (96.54 kph) 65.23 mph (104.95 kph) +5.23 mph (+8.41 kph)
65 mph (104.58 kph) 70.66 mph (113.69 kph) +5.66 mph (+9.11 kph)
70 mph (112.63 kph) 76.10 mph (122.44 kph) +6.10 mph (+9.81 kph)
75 mph (120.67 kph) 81.53 mph (131.18 kph) +6.53 mph (+10.51 kph)
80 mph (128.72 kph) 86.97 mph (139.93 kph) +6.97 mph (+11.21 kph)
85 mph (136.76 kph) 92.40 mph (148.68 kph) +7.40 mph (+11.91 kph)
90 mph (144.81 kph) 97.84 mph (157.42 kph) +7.84 mph (+12.61 kph)
95 mph (152.85 kph) 103.27 mph (166.17 kph) +8.27 mph (+13.31 kph)
100 mph (160.90 kph) 108.71 mph (174.91 kph) +8.71 mph (+14.01 kph)
105 mph (168.94 kph) 114.14 mph (183.66 kph) +9.14 mph (+14.71 kph)
110 mph (176.99 kph) 119.58 mph (192.40 kph) +9.58 mph (+15.41 kph)
115 mph (185.03 kph) 125.02 mph (201.15 kph) +10.02 mph (+16.11 kph)
120 mph (193.08 kph) 130.45 mph (209.90 kph) +10.45 mph (+16.82 kph)
125 mph (201.12 kph) 135.89 mph (218.64 kph) +10.89 mph (+17.52 kph)
130 mph (209.17 kph) 141.32 mph (227.39 kph) +11.32 mph (+18.22 kph)
135 mph (217.22 kph) 146.76 mph (236.13 kph) +11.76 mph (+18.92 kph)
140 mph (225.26 kph) 152.19 mph (244.88 kph) +12.19 mph (+19.62 kph)
145 mph (233.31 kph) 157.63 mph (253.62 kph) +12.63 mph (+20.32 kph)
150 mph (241.35 kph) 163.06 mph (262.37 kph) +13.06 mph (+21.02 kph)
155 mph (249.40 kph) 168.50 mph (271.12 kph) +13.50 mph (+21.72 kph)
160 mph (257.44 kph) 173.93 mph (279.86 kph) +13.93 mph (+22.42 kph)
165 mph (265.49 kph) 179.37 mph (288.61 kph) +14.37 mph (+23.12 kph)
170 mph (273.53 kph) 184.81 mph (297.35 kph) +14.81 mph (+23.82 kph)
175 mph (281.57 kph) 190.24 mph (306.10 kph) +15.24 mph (+24.52 kph)
180 mph (289.62 kph) 195.68 mph (314.84 kph) +15.68 mph (+25.22 kph)
185 mph (297.67 kph) 201.11 mph (323.59 kph) +16.11 mph (+25.92 kph)
190 mph (305.71 kph) 206.55 mph (332.33 kph) +16.55 mph (+26.62 kph)
195 mph (313.75 kph) 211.98 mph (341.08 kph) +16.98 mph (+27.33 kph)
200 mph (321.80 kph) 217.42 mph (349.83 kph) +17.42 mph (+28.03 kph)


If your speedometer has been calibrated for 245/75 R 16 (30 x 9.65 x 16) tires, replacing them with 235/65 R 16's (30 x 9.25 x 16's) would result in the speedometer reading high by 8.71%.




Odometer Error

Actual Mileage Indicated Mileage with Tire B Odometer Error
1 mi (1.61 km) 1.09 mi (1.75 km) +0.09 mi (+0.14 km)
5 mi (8.04 km) 5.44 mi (8.75 km) +0.44 mi (+0.70 km)
10 mi (16.09 km) 10.87 mi (17.49 km) +0.87 mi (+1.40 km)
50 mi (80.45 km) 54.35 mi (87.46 km) +4.35 mi (+7.01 km)
100 mi (160.90 km) 108.71 mi (174.91 km) +8.71 mi (+14.01 km)
500 mi (804.50 km) 543.55 mi (874.56 km) +43.55 mi (+70.06 km)
1000 mi (1609.00 km) 1087.09 mi (1749.13 km) +87.09 mi (+140.13 km)
5000 mi (8045.00 km) 5435.45 mi (8745.65 km) +435.45 mi (+700.65 km)
10000 mi (16090.00 km) 10870.91 mi (17491.29 km) +870.91 mi (+1401.29 km)
50000 mi (80450.00 km) 54354.54 mi (87456.45 km) +4354.54 mi (+7006.45 km)
100000 mi (160900.00 km) 108709.08 mi (174912.91 km) +8709.08 mi (+14012.91 km)


Same as with the speedometer, if your odometer has been calibrated for 245/75 R 16 (30 x 9.65 x 16) tires, replacing them with 235/65 R 16's (28 x 9.25 x 16's) would result in the odometer reading high by 8.71%.



Effective Gear Ratio Change

Rearend ratio with 245/75 R 16's Rearend ratio with 235/65 R 16's
4.10 4.46

As far as gearing goes, if you have a 4.10 rearend and 245/75 R 16 tires (30 x 9.65 x 16), changing to 235/65 R 16's (28 x 9.25 x 16's) would be the same as if you kept your current wheels and tires but changed your rearend gears to 4.46's

http://www.dakota-truck.net/CGI-BIN/TireCalc.cgi <for calculations.

 

[adsm08]

4.10, 4.0. That should fix your power problems.

The 3.0 is a car engine, it wants to rev up.

 

[lil_Blue_Ford]

My 2000 Ranger ran fine with the 3.0L, 5-speed, 3.73 gears and 235/75/15 tires. 4.10 gears would have been nice for all the hauling I did with it, but I also drove a lot of highway and I liked how the 3.73 gears worked out. I could cruise all day long at 70mph and actually hit 31 mpg cruising at 70 with it. Of course, that was also before they started putting all of that ethanol crap in the gas, which knocked my fuel economy way back.

 

[dinosore]

thanks guys for all the input 4.10 is what ill hunt for. I was gunna go with a hi rise if i can get my hands on one for a good price Earl. Adsm a 4.0 isnt gunna happen till the 3.0 gives out and it's holding up well.

 

[JerZDevil81]

I got 4.10s for an 8.8 I want to let go of. $80 shipped.

I can send some pics when I get home

 

[dinosore]

I got no welding skills to redo the leaf perches otherwise i'd take you up on that Jerzdevil

 

[4.0B2]

4.10

 

[dinosore]

sorry to bring this dead issue back up. I've been sitting here collecting parts meaning axle bearings and such. Now im ready to purchase the gears. I got no problem running the 4.10 but have some one willing to sell me yukon 4.56 ring and pinion about a 90 minute drive for 175. He states he never got around to installing it and sold his b2 so its been sitting. Now once again with my end goal of putting a camper shell on the truck, possibly building a wood frame sleeping platform with storage areas for climbing gear would 4.56 gears be overkill with the 235/75's? or would they be a good idea?

 

[adsm08]

Go for it. Just don't expect high gas mileage or low rpm.

Postin' from teh Galaxy

 

[ZMan]

4.56s will definitely kill any hopes of getting decent gas mileage on the highway with 235/75s