SmokeyWren: Your right, this is when I first got the trailer and have learned to pack the trailer a little better by less fresh water because the tank is in front of the axles and because I went from a popup to a 5th Wheel I brought two of everything and stored it in the front basement storage. Pasted a little history below. Hope it helps someone. I see a lot of F250's pulling the same trailer and heavyer, I know it dosen't make it right.
POSTED A YEAR AGO
An example and to also have the experts here confirm if I’m on the right track. I have a 2008 F350 PSD SRW 4x4 CC and I pull a 2008 313RKS Jayco. On the door sticker of my truck it states that my truck and trailer GCWR is 23,000 pounds and my truck GCWR is 11,400 pounds with a load capacity of 3,223 pounds. So last week I checked and found a CAT Scale near I would be going by on a trip and I stopped to get the real weights. In the truck was the DW and I (400 lbs + -) with 15 gallons of fuel and the 5th wheel was packed for a week, which also had 46 gallons of fresh water.
So If someone could please tell me why my steer axle weight didn’t change, my Husky hitch must not be 1” ahead of the rear axle? is this OK or should I have the Dealer (installer) move the hitch ahead. Also I believe that I’m not over loaded, but close. The fresh water tank is ahead of the axles, which weights close to 500 lbs and I think if I travel empty it would take most of that weight off the pin. I’m getting 10 MPG on the highway towing and 18mpg empty at 67mph. IT seems to handle well and it’s not like I’m going to tell the DW that I need a bigger truck, anyway.
__________________ -2008 F-350 CC 4X4 Lariat, SRW, 3.73.
Any color, as long as it's "Black".
Ordered 12/31 - Born 02/11 - Picked up 03/29. -1972 First Ford - 1956 Fairlane - Mint
Rolled it at 100+mph (Teenager, Duh, no one hurt)
Totaled Oct/73 (Over 35 Years ago and still remember that lesson). -First New Ford - 79 Bronco - Ordered Mar/79
150K Miles - I disassembled 2000 and I sent it to three different scrap yards. -1982 - My Sister married a GM Sales Manager (He Retired 2007, "Hello" Ford Super Duty, enough said, LOL). -2003 - ZRX1200 (Some say "Mid Life", LOL). -2008 - Jayco 313RKS 5th (The kids won't move out of the house).
Forgive this silly question. But, How can you figure out of you have 3.55 gears or 3.73 gears in your Diffs?
This forum is for '08-up trucks, so I'll assume you're asking about an '08 and not your '96.
On the lower doorpost behind the driver's door is a Federal Certification Label, that includes VIN, month/year of assembly, tire size and PSI, and some codes, including the axle code. Here are those codes:
Axle Type
The following lists the gear ratios on rear axles.
Notice that 3.55 is not included, because there was no 3.55 available on the date of that table = March 2008. I don't have a table for the 2009 models, so I could only guess what the codes for 3.55 might be.
Another way to tell is one of the tags on the diff. For SRW pickups, the second line of that tag will begin with either "3 73" or "3 55" if it's a open axle, or ""3L73" or "3L55" if it has limited slip. That first "3" will probably be covered up with a bolt head and/or dirt/gunk, so if there is a 73 or 55 near the first of the tag you can guess what's hidden under the bolt head. The "L" means limited slip.
Quote:
If the rear is 3.73 Limited Slip would front be 3.73 Limited Slip too?
The ratio will be the same, but Ford doesn't put limited slip differentials in the front end. If you have an LS front end, somebody used aftermarket parts to make it LS.
Last edited by SmokeyWren; 02-28-2009 at 08:05 AM.
If the rear is 3.73 Limited Slip would front be 3.73 Limited Slip too?
Phillip
I don't think so and no. Regarding the ratio, my understanding is that 4WD vehicles are always built with the front axle ratio slightly higher to insure that the vehicle will track straight when in 4WD. This was true for my '66 F250, which had 4:56 rear and 4:55 front axle ratios. I'm not certain if Ford still does this, but it would make sense.
Regarding the limited slip, as another has already posted, limited slip is not a factory option on Ford front axles. In fact, if I am right about the ratio being slightly higher up front, I am guessing no one makes a limited slip option for front axle ratios because the demand would be very small for that odd ratio axle. You can get an air locker for the front axle of course, if you want to lock the front axle on demand from inside the cab.
Regarding the ratio, my understanding is that 4WD vehicles are always built with the front axle ratio slightly higher to insure that the vehicle will track straight when in 4WD. This was true for my '66 F250, which had 4:56 rear and 4:55 front axle ratios. I'm not certain if Ford still does this, but it would make sense.
Are you sure? The example you mentioned is just a 0.2 % difference. So there has to be a gearwheel which has 500 teeth in the front and 501 teeth in the back.
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-2008 F-350 CC 4X4 Lariat, SRW, 3.73.
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