By re-gearing my truck from 3:73's to 4:56's will that change my max. towing capacity and if so how much? Check sig for truck info. I will be around 4:10's with my tire size. What is the max weight I can tug with this truck using a 5er hitch, the wife wants me to hitch up to a Hilton, yep you know right where that took the conversation. [img]/ubbthreads/images/graemlins/grin.gif[/img]
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2005 F-350, 6.0 PSD, Lariat,4x4,CC,LB,Torqshift,7" ProComp StageII Lift,MX-6 Reservoir 6 Way Adjustable Shocks, 37" BFG M/T, 18" Mazzi Hulk Wheels, Duel Steering Stabilizers, 6 Piece Billet Grille, Isspro 3 Guage A-Pillar, AFE SS 4" Turbo Back Exhaust, 4:56's, Firestone Air Bags, SCT by ID
By looking at your Sig. I don't know if you will be able to pull a fifth wheel with 7" of lift and 37" tires. You probably won't have enough clearance between the top of the bed and fifth wheel. JMO. You might could flip the axles on the fifth wheel to make it higher off the ground so the truck/trailer combo would be more level or look for a fifth wheel with the springs mounted on top of the axles.
Maybe someone with your same setup will chime in.
Firefighter9208
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Early 99 (3/98) Extended Cab F 250 XLT 4X2, PSD, 6 Speed, LWB, SRW. 140,000 miles. LUK Clutch, C-BETR Tow Mirrors, Muffler Delete Pipe, Removed Catalytic Converter, Autometer Dual A Pillar Guages with pre-turbo Pyro and Boost, SCMT 1705 Max Tuner, Tymar Intake from Airflo.com. 265/75/16 Firestone Transforce A/T's. Fumoto Drain Valve.
I have the same truck and if I was to do it again I would have gone with 4.30's not 4.56's. My 5'er is heavy and I have camped in it 50 nights this year. So I have alot of miles to compare it to my old trucks and other friends. To many rpm's and bad mileage. If your not going to pull a huge trailer or 5'er even 4.10's would be better. If you ever like to get on the freeway and fly (80) empty, you can forget it with 4.56's or you'll be getting around 11 mpg and about 2500 rpm's. hope this helps.
I am going to be pulling a 38' Toy Hauler that has a GVW of 15,500 lbs. I am re-gearing so I will have right around 420:1 gear ratio after I add the 245/70R-19.5 Commercial Truck tires (4,900 lb Load Rating Each) [img]/ubbthreads/images/graemlins/biggrin.gif[/img]. That should give me around 2100-2200 RPM's at 65 MPH. [img]/ubbthreads/images/graemlins/smokin.gif[/img] [img]/ubbthreads/images/graemlins/cool.gif[/img]
The gearing you need all depends on what you are towing and WHERE you are towing it.
I am heading west to the Rocky Mnt's for a few years to look around and see what the country looks like out that way. [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
Wayne B
__________________ 2000 F-250 XLT PSD 4X4 ESOF Auto, SC, LB, Gauges, Mag-HyTech Trans Pan & Rear End Cover, <font color="red"> (((XM))) Inside</font>, ATV Racks w/ Two Kawasaki Prairie 400 4X4's sitting on them, 25' Rockwood TT. Ashburn, Va. Member # 103 Pictures
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besides, anything the 6.0 can't pull with 3.73's, you need a dually to pull.
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With stock tires maybe. But he's gone up to some pretty big tires, definitely needs to regear.
Trinity
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Early 99 6spd (Eaton Fuller Knob), 285x75 MTR's, DI 4 POS Chip, Walker BTM, listening to XM Delphi skyfi, pulling 24 ft full of Mechanical Bull, heading to a bar near you! Truck pics
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Legally, that doesn't change the sticker in the door any.
Realistically, you'll be able to pull that weight a bit easier.
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GCWR isn't listed on the the door or anywhere else on the vehicle. If you want to increase your "legal" GCWR, hook up to a bigger trailer.
10,000 GVWR truck hooked to a 14000 GVWR trailer has a GCWR of 24000 for government purposes.
10,000 GVWR truck hooked to a 20000 GVWR trailer has a GCWR of 30000 for government purposes (and requires a CDL to operate) even though it's the same truck.
Every DOT officer that I have talked to say that the CDL is required if you are for hire doesnt matter if you stay under 26001 or not. If you take a profit for hauling you are in need of a CDL. Thats what the officers at the scales are telling me when I call.
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the CDL is required if you are for hire doesnt matter if you stay under 26001 or not. If you take a profit for hauling you are in need of a CDL.
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I don't see what state you are from, but that isn't true everywhere. There is no such Federal regulation. In fact, the FMCSR (383.23) clearly defines the requirement for a CDL is if you drive a CMV, defined in the same subpart (383.5) as above 26,001 GCWR and above 10K GWR on the included tractor, or above 26,001 on a single unit.
Hazmat, passengers, busses, etc. are a different story.
A guy delivering flowers or vegetables in a Sprinter van does NOT need a CDL, at least in New York. Commercial plates, yes. CDL, no. I suspect that remains true in more states than not.
For instance, you can't get a passenger plate in NY for a dually pickup. It MUST have commercial plates, unless it has a camper shell-- then it gets RV plates. So does that make it a commercial vehicle? Requiring a CDL? Nope. [img]/ubbthreads/images/graemlins/confused.gif[/img]
The reverse is also confusing. Many posters have claimed in the past that I can own and drive a twin-screw Mack dumptruck full of stone on a Class D ticket, as long as the stone and the hauling is for my own personal use. Not so in New York! As soon as you break the 26K barrier, you must obtain a CDL to drive it no matter if you ever do 1 cent of commerce. [img]/ubbthreads/images/graemlins/mad.gif[/img]
Confusing? You bet. Exemptions include certain farm uses and hauling bees. I'm serious, bees. [img]/ubbthreads/images/graemlins/shrug.gif[/img]
This has been hased over and over again -- and usually the problem is that every State is different. What's worse, I'm not sure every DOT scale officer is really an authority on the law ... perhaps just an "authority". [img]/ubbthreads/images/graemlins/rolleyes.gif[/img]
Anyhow, I should shut up now. Or maybe a while ago...
-steve
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S.A McChesney
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'72 BMW 2002tii Fprod Race Car --- '82 Bitter SC 5-spd
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'95 EB 351 Bronco --- '69 Lotus Europa --- '87 Merkur XR4ti --- '85 Bitter SC 3.9</font> '02 F350 Lariat CC Dually Longbed PSD 4x4 6spd
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32' invert 5er Britton/Transport Sys 12K GVWR Toybox,Honda 3kw Gen,Fridge,Micro,5kw Inverter,ColemanPolarCub
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From Fords own data, by putting 4.30 gears in a stock truck ie: Tow Boss package, you up your GCWR to 26K. I'm not sure how that plays into your setup, but legally, Ford has rated your frame etc to gross at 26K from my understanding. As someone else has said, GCWR is not posted on your door, it is a number Ford has come up with largely related to gearing. If your final gearing puts you at 4.10 overall, you will be under what Ford likes to go for that 26K in gross combined. I believe that number has to do with strain on driveline and what they want to warranty for fixes.
If you want to go with 4.56, I would recommend getting a US Gear or a Gear Vendor so when your not towing, you can still keep the rpms low for fuel economy. However, with that lift your still pushing a block through the air with a lot of air disruption underneath, plus there is a lot of unsprung weight with those size tires so don't expect great fuel economy anyway.
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Current truck 2005 F350
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I believe that number has to do with strain on driveline and what they want to warranty for fixes.
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GCWR is determined by actual tests on a mountainside. They have a certain grade for a certain distance, pulling a certain load at a certain speed in a certain gear and climb the mountain. The engineers can estimate close to the max GCWR massaging numbers, but then they test those numbers on the road - in a real truck dragging a real trailer up a real grade.
The GCRW is the weight that tow vehicle with that engine and drivetrain can climb that mountain with that load at that speed without overheating any of the components - engine, tranny, rear axle, etc. Then they throw in a fudge factor and establish the published GCWR.
The only thing warranty has to do with it is they know if you overheat any of the driveline components you'll soon have a broken truck, and you'll be coming in to have Ford fix your truck. And if you exceed the Ford weight limits - including GCWR - then you aren't covered by the Ford warranty. [img]/ubbthreads/images/graemlins/shrug.gif[/img]
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My Sierra Blanca is a '99.5 PSD CrewCab hot-rod Towing Machine! BTS tranny; TurboRamAir intake and 4" stainless turbo-back exhaust; DP-Tuner tunes flashed into an Edge Evolution tuner; ISSPRO EV gauges and TTM; AIC; SP-Diesel exhaust brake and torque converter controller. I special-ordered it new and plan to drive it until it quits.
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I believe that number has to do with strain on driveline and what they want to warranty for fixes.
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GCWR is determined by actual tests on a mountainside. They have a certain grade for a certain distance, pulling a certain load at a certain speed in a certain gear and climb the mountain. The engineers can estimate close to the max GCWR massaging numbers, but then they test those numbers on the road - in a real truck dragging a real trailer up a real grade.
The GCRW is the weight that tow vehicle with that engine and drivetrain can climb that mountain with that load at that speed without overheating any of the components - engine, tranny, rear axle, etc. Then they throw in a fudge factor and establish the published GCWR.
The only thing warranty has to do with it is they know if you overheat any of the driveline components you'll soon have a broken truck, and you'll be coming in to have Ford fix your truck. And if you exceed the Ford weight limits - including GCWR - then you aren't covered by the Ford warranty. [img]/ubbthreads/images/graemlins/shrug.gif[/img]
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I think we just said the same thing Smokey, except you adding a lot more good info. [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
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