Ford Super Duty (1999-2016) :: 2008 F250 - Changing Rear Axle Ratio - Lower RPM?
Aug 11, 2013
My truck is a 2008 F250 6.4 Powerstroke 4x4 King Ranch, CrewCab, Shortbed.
I don't know which rear axle ratio it has - maybe someone can help me. the tires mounted are 275/60R17 and in fifth gear (TC locked) the engine has 2000rpm @ 70mph. I think it is a bit to much so I want to install a kit with and lower ratio. I pull trailers just sometimes and here in germany these only have 3,5tons max weight. So I think I don't need this power at 70mph. 1750rpm would be enough. How do I have to modify the front axle ratio if I get a lower-ratio-rear-axle?
I want to lower the fuel consumption. After some modifications, the truck needs round about 12-13L/100km (18-20mpg) and I think it is possible to lower this as bit.
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I have a 99 f250 with some procomp (325s) that are 12.5 wide with a 6in lift my superchip tuner can change the trannys shift points but I am pretty sure a new gear ratio is needed. I dont do a whole lot of off roading with it its mainly my driving around and highway rig whats a good gear ratio that would work for me
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Just ordered a 2014 SD 250 FX4 CC SB 6.2L Lariat. I ordered it w/ the 3.73 axle ratio, but have two weeks to change it if I choose. Was wondering the pros and cons of both axle ratios. Going to be hauling a 16 foot tandem axle enclosed trailer with 7 dozen goose decoys and a four wheeler and other gear through corn fields 100 days a year. I'm fairly hard on trucks and this is my first ford I've owned myself, but have driven a lot of them at work. Basically need opinions on best axle ratio to get in and out of muddy, or snow covered fields.
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I just bought a 2000 F250 5.4 gas. I have some minor issues that I will be trying to fix. This is my first full size truck and I bought it to pull a trailer once in a while. How can I find the axle ratio for this specific truck? Is it written on the truck somewhere?
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Just got done rotating my tires on my 16 F250 ccsb 4x4 and I used jack stands on my rear axle while I used the jack on the front axle. When I brought the truck down off the jack stands (first time using jack stands on this truck) I saw that they left little marks/divits on the rear axle. I had them between the wheel and the shock support and I can feel with my finger where the jack stand was supporting the truck. It doesn't seem anything major but I can surely point out to you exactly where the axle and the jack stand met. I'm sure this is a non issue but just wanted to check in here to make sure...
No trailer attached (of course!) And nothing in the bed with a full tank of gas...so basically just the weight of the truck...
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What exactly does the sensor on the rear axle do? 08' f350. I know it's a speed sensor of some sort, but what does it do or control exactly.
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Here's my problem while replacing brake pads i found that my axle has leaked fluid on the pss,side rear rotor and all over .. I been looking for any info on repairing it myself . I found Everything for every other truck just not for this truck.
It's 2003 F-250 w/5.4L all Stock rear axle has 12 bolts and gears are 7.73 ... I believe its a Dana 60. No tags or markings on the Axle to go by..
I live in the Freak-en woods here so i like to order all the right parts once and do over the weekend .. its my only ride so once apart im stuck here.... I did check the Vent Tube its fine..
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I made a bone head mistake and crunched the steel brake line between the rear axle and the passenger side sway bar mount. Truck is a 2003 F-250 with a 7.3. I would like to go to the auto parts store, get bulk steel brake line and bend it myself. But, I don't know what size the line is or what size the fittings are. Whatare the sizes???
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I'm trying to troubleshoot a leak on my 08' F250 with a 6.4 powerstroke. It's been dripping coolant when cold pretty aggressively. Once the truck heats up, the coolant leak seems to mostly go away.
Here's a picture of the drip, it's marked by a dart, so you can see the location from the top (second pic). The radiator house connection around the engine seems dry.
Pic from Top ....
What's hidden here that could be causing the leak?
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My son recently purchased this truck in Jan., 2017, upon inspecting the vehicle we noticed the rear driver and passenger windows would not raise or lower. When I asked the seller about this his comments were " I believe it to be a master switch issue". Ok so no big deal, I purchased and replaced the master switch with no luck. I didn't spend much time on it due to the cold weather. After digging into this a little more I'm very confused now. So here is where I currently am at with this issue.
Power is not the problem, I am reading approx. 14V at the master switch and at the rear door switches. I've checked and have power when the switch is toggled to simulate raising and lower of the window (approx. 12 to 13.5V). The window lift motors have been taken out and cleaned and inspected. The motor will operate properly with a 12V battery pack (both motors, driver and passenger side). I have power all the way to the motor itself, slightly less than 14Volts.
I can raise and lower the window in the truck by plugging into the back of the female connector with the outside power source but not with the power supply from the truck. I have continuity between the power(blue) and ground(black) wires at the switches. So this is where I am at, also just a reminder the front windows and door locks work fine. Just a side note, this truck has aftermarket mirrors on it so that branch of the harness is left hanging.
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2005 Ford 350. I want to change the ball joints on the front axel and I cant remove the axle out of dif. to remove the ball joint housing. I have been prying and pulling and it just moves out a 1/4 inch or so .They tell me there is no ring to remove in dif before you can pull it out but why this trouble?
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I have a 2002 F450 2WD AT with the common Dana 80 4.88:1 posi rear diff. If I change the ring & pinion to 4:10 do I need to change the carrier or does my current carrier fit 4:10 & lower [4.63,4.88, 5.13 etc]? Will I need to adjust my speedo readings & if so how is this accomplished? Electronically via the diagnostic port?
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Took truck out for a ride and stopped for gas. I smelled Brakes and upon inspection found the left rear brake pads were not releasing. Any take on what could be holding it? 2008 F-250.
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I have had the truck just under a year. It has 104k on it i only drive it on weekends. Last weekend going to Home Depot about 15 miles got out and could smell brakes burning. Felt the wheels and the right rear was very hot. Got back home no smell but still hot not as hot as earlier. Pulled the wheel off it looks as if the pads and calipers are fairly new paint is still on them caliper is a TRW. The pads were stuck in the carrier even the stainless clip ends look rusted.
Cleaned it all up both sides lubed the pad carrier with pin lube. Pushed the calipers back in some both sides went in easy. The right rotor has definitley been hot. Put it all back together and went for a test drive. Came back no problems checked the temperature with a laser type heat thermometer all wheels were around 140 f. Went out yesterday morning stopped and could smell the brakes again. Drove it back home and the right rear was 300 f. others 150 to 160 f.
Jacked it up put it in neutral and the you can spin the wheels by hand. Started the truck had the wife get in put it in drive wheels turning applied the brakes they stopped let go they turn freely again tried the parking brake it works fine also. So do I buy new calipers and brakes or maybe is the wheel bearing going bad causing the brakes to heat up?ied.
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I have a 1999 F-250 super duty 7.3 4x4 and the rear drivers side axle seal is leaking. My question is how do I remove the axle shaft? my last truck a f150 had c clips in the diff that released the axle shaft but I did not see those on this truck. How to remove the axle shaft?
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Love my '11 f250 SD 4WD CC SB. 6.2 with 3.73 e-locker. I've got 5 Star tunes in it, and the truck is a joy to drive empty, and tows my current 7k camper fine, though on steep inclines I wish I had the 4:30 gears.
Well, we just bought a bigger trailer, dry weight is an addtl 2400+ at 9400, so I'll need to do something.
I don't want a different truck, don't want (another trouble-prone) diesel. I think with 4:30s and the tune, I should be fine towing that trailer (with gear and passengers, probably 11-11.5k loaded). Not doing mountains here, just Michigan hills.
What's the best way to "do" a gear swap? I know if I buy a set of gears and a shop screws Em up, it's gonna whine/hum and still cost 2k to do (truck is 4wd)
I'm up in the boonies and finding a shop to swap the gears will be a problem. Getting Em done right will be even MORE trouble.
Can I just find 4:30 axles ans have them swapped (anything in t-case or sensors need to be touched?). I don't care if I lose the e-locker, I never use it.
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I've got a 2008 f-250 extra cab. A small bump will cause the rear driver side door to pop open. What I have to do to fix it, I don't want the grandkids falling out.
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Actually a couple of questions. I've had one oil change in my F250 6.7. Getting close to the second one. So, my question is, what is the computer using to decide when to tell you that you should change the oil? And, if you changed to a synthetic oil, could you go longer between changes? And, if so, would the truck's sensors be able to tell the difference in the type of oil being used?
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Finally finishing up my 2001 F250SD 4X4 project. Decided to pull down the front axle to replace the dust seals. I've got everything apart including the large knuckle seals. Tried to pull the passenger side axle out but it only moves about an inch to an inch and a half before it stops. Took off the differential cover to look for damage or something obvious but I don't see anything wrong. The axle is moving within the splines of the spider gear but that's it. Stumped and sitting on jacks!
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Check out the pics. 99 f250 4x4. I have a leak in my front axle shaft. It looks like it is coming out of the dust cap on the end of the front shaft. I am pretty sure it is differential fluid from the smell. Is there a seal before the dust cap? Is the shaft hollow with fluid in it? I thought it was just in the differential and if it leaks it is at the seals where the axle goes into the differential not at the otter end.
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I have a new 2013 f 250 gaser the truck I noticed sits crooked it is lower on drivers side by almost 2 inches and not from the fuel tank.
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