Anyone out there with 4.30 or 4.56 gears?
#31
08-19-2013, 10:43 PM
I've had my 2000 4X4 f350 6.8 dually since new and during it's 135000 miles of only towing have averaged 10mpg. Not bad. I've been hauling 1000lb big squares on a 30ft gooseneck. 27 bales to be exact. Last time I rolled over scale I was 39640lbs....I'm not bragging or being a smart a$$. But don't try and tell me my trans won't hold or that I need different gears or a tuner....no it's not taking off like a rocket, but I don't try too. I love my V10. Sad I can't get a 2014 F350 with one.
#32
08-21-2013, 08:04 AM
Lead Driver
https://www.ford-trucks.com/forums/9...vs-v10s-4.html
I just pulled the the 5th wheel (total truck and trailer 20,500#, 5th wheel 12,650#)from Colorado Springs, CO towards Black hills, SD set the cruise at 65 mph and was getting 7.5 mpg. This truck has 242,000 miles with a new engine put in roughly 60k miles ago.
I thought I had a heavy foot but Dave yours might be slightly heavier.
To the OP, enjoy the truck it's a beast as it is for the earlier year V10s.
#33
08-28-2013, 12:11 AM
Well I'll add in too. Just recently purchased a new camper, 7,700 empty, prolly 8,800 going camping. The 3.73's do OK, but not well enough, so I found a complete 4.30 rear end for $350 and will slide that in and see what happens. MPG's, don't really care, it's the power and comfort I'm looking for. I like to keep it between 65 and 70 MPH. Normal speed limits in TX is 75MPH, so I'm still below that and that is about as fast as I feel comfortable with. A 5 star tune might be next, we'll see.
EDIT: I used to tow a 5,700lb camper and got 7-8 MPG, with the new one it's not much different, but I have a noticeable loss in driveability (power). BTW without towing on HWY I get in the low 14's high 13's at 75 or better. It also has 175K on it.
EDIT: I used to tow a 5,700lb camper and got 7-8 MPG, with the new one it's not much different, but I have a noticeable loss in driveability (power). BTW without towing on HWY I get in the low 14's high 13's at 75 or better. It also has 175K on it.
#36
09-03-2013, 12:20 PM
I have to correct my earlier statement. I just double-checked 17 number VIN decoder info. It appeared that VIN does not have the axle code . I am pretty sure the drivers side door frame sticker has the axle code . Here are the codes;
Axle Type
31 — 3.73 non-limited slip, F-250/Excursion
C1 — 3.73 limited slip, F-250/Excursion
32 — 4.10 non-limited slip, F-250
C2 — 4.10 limited slip, F-250/Excursion
33 — 4.30 non-limited slip, F-250
C3 — 4.30 limited slip, F-250/Excursion
36 — 4.56 non-limited slip, F-250
C6 — 4.56 limited slip, F-250
41 — 3.73 non-limited slip, F-350 (single rear wheels)
D1 — 3.73 limited slip, F-350 (single rear wheels)
42 — 4.10 non-limited slip, F-350 (single rear wheels)
D2 — 4.10 limited slip, F-350 (single rear wheels)
43 — 4.30 non-limited slip, F-350 (single rear wheels)
D3 — 4.30 limited slip, F-350 (single rear wheels)
46 — 4.56 non-limited slip, F-350 (single rear wheels)
D6 — 4.56 limited slip, F-350 (single rear wheels)
61 — 3.73 non-limited slip, F-350 (dual rear wheels)
F1 — 3.73 limited slip, F-350 (dual rear wheels)
62 — 4.10 non-limited slip, F-350 (dual rear wheels)
F2 — 4.10 limited slip, F-350 (dual rear wheels)
63 — 4.30 non-limited slip, F-350 (dual rear wheels)
66 — 4.56 non-limited slip, F-350 (dual rear wheels)
F6 — 4.56 limited slip, F-350 (dual rear wheels)
81 — 3.73 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E1 — 3.73 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
82 — 4.10 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E2 — 4.10 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
83 — 4.30 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E3 — 4.30 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
86 — 4.56 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E6 — 4.56 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
88 — 4.88 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
EW — 4.88 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
G3 — 4.30 limited slip, F-450 Chassis Cab
73 — 4.30 non-limited slip, F-450 Chassis Cab
78 — 4.88 non-limited slip, F-450 Chassis Cab
G8 — 4.88 limited slip, F-450 Chassis Cab
75 — 5.38 non-limited slip, F-450 Chassis Cab
G5 — 5.38 limited slip, F-450 Chassis Cab
GW — 4.10 limited slip, F-450 Chassis Cab
98 — 4.88 non-limited slip, F-550 Chassis Cab
K8 — 4.88 limited slip, F-550 Chassis Cab
95 — 5.38 non-limited slip, F-550 Chassis Cab
K5 — 5.38 limited slip, F-550 Chassis Cab
KW — 4.10 limited slip, F-550 Chassis Cab
Transmission Type
E — Four-speed automatic overdrive (4R100), gasoline engines, F-Series/Excursion
9 — Four-speed automatic overdrive (4R100), diesel engine, F-Series/Excursion
6 — Six-speed manual, Dana ZF (M6HD-6), F-Series
5 — Six-speed manual, F-Series (5.4L, 6.8L Gas)
2 — Five-speed manual, F-Series (5.4L, 6.8L Gas/LPG), Mexico only
.......................
Enjoy your truck !
Axle Type
31 — 3.73 non-limited slip, F-250/Excursion
C1 — 3.73 limited slip, F-250/Excursion
32 — 4.10 non-limited slip, F-250
C2 — 4.10 limited slip, F-250/Excursion
33 — 4.30 non-limited slip, F-250
C3 — 4.30 limited slip, F-250/Excursion
36 — 4.56 non-limited slip, F-250
C6 — 4.56 limited slip, F-250
41 — 3.73 non-limited slip, F-350 (single rear wheels)
D1 — 3.73 limited slip, F-350 (single rear wheels)
42 — 4.10 non-limited slip, F-350 (single rear wheels)
D2 — 4.10 limited slip, F-350 (single rear wheels)
43 — 4.30 non-limited slip, F-350 (single rear wheels)
D3 — 4.30 limited slip, F-350 (single rear wheels)
46 — 4.56 non-limited slip, F-350 (single rear wheels)
D6 — 4.56 limited slip, F-350 (single rear wheels)
61 — 3.73 non-limited slip, F-350 (dual rear wheels)
F1 — 3.73 limited slip, F-350 (dual rear wheels)
62 — 4.10 non-limited slip, F-350 (dual rear wheels)
F2 — 4.10 limited slip, F-350 (dual rear wheels)
63 — 4.30 non-limited slip, F-350 (dual rear wheels)
66 — 4.56 non-limited slip, F-350 (dual rear wheels)
F6 — 4.56 limited slip, F-350 (dual rear wheels)
81 — 3.73 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E1 — 3.73 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
82 — 4.10 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E2 — 4.10 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
83 — 4.30 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E3 — 4.30 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
86 — 4.56 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
E6 — 4.56 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
88 — 4.88 non-limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
EW — 4.88 limited slip, F-350 Chassis Cab, narrow frame (dual rear wheels)
G3 — 4.30 limited slip, F-450 Chassis Cab
73 — 4.30 non-limited slip, F-450 Chassis Cab
78 — 4.88 non-limited slip, F-450 Chassis Cab
G8 — 4.88 limited slip, F-450 Chassis Cab
75 — 5.38 non-limited slip, F-450 Chassis Cab
G5 — 5.38 limited slip, F-450 Chassis Cab
GW — 4.10 limited slip, F-450 Chassis Cab
98 — 4.88 non-limited slip, F-550 Chassis Cab
K8 — 4.88 limited slip, F-550 Chassis Cab
95 — 5.38 non-limited slip, F-550 Chassis Cab
K5 — 5.38 limited slip, F-550 Chassis Cab
KW — 4.10 limited slip, F-550 Chassis Cab
Transmission Type
E — Four-speed automatic overdrive (4R100), gasoline engines, F-Series/Excursion
9 — Four-speed automatic overdrive (4R100), diesel engine, F-Series/Excursion
6 — Six-speed manual, Dana ZF (M6HD-6), F-Series
5 — Six-speed manual, F-Series (5.4L, 6.8L Gas)
2 — Five-speed manual, F-Series (5.4L, 6.8L Gas/LPG), Mexico only
.......................
Enjoy your truck !
#37
09-03-2013, 06:27 PM
#38
09-03-2013, 07:08 PM
One of the two tags on the differential will have the ratio stamped into it, the other will tell you to use synthetic gear oil. Usually the fist number of the code is hidden under the head of the bolt. 4L30 = 4.30 with Limited slip, 3L73 = 3.73 Limited slip. If there's a " "(space) instead of an "L" it is an open differential, i.e. 3 50 = 3.50 open differential.
#39
09-14-2013, 12:44 PM
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Been thinking of going the other way
I have a 2001 f250 6.8, 2V, 4r100, and 3.73 gears in it. Since installing a 2005 (3v) shortblock, raising the compression a good amount,I've put about 35k on it, bringing the total miles to 208k. My mileage hovered at the 10-11 mpg mark until I replaced the plastic pistoned calipers, which were SERIOUSLY hanging up, with a pair rebuilt with metal pistons. I don't know if it was coincidence, but I haven't seen under 12.0, and have gotten as high as 13.6 since this improvement. I've been mulling over the idea of switching to 3.54 gears in hopes of getting that mileage up into the 17-18 range. The only reason I think this is possible is that my truck before this was a '98 Dodge 2500 with a 24 valve cummins and 3.54 gears, and it got a consistent 20+ mpg. Granted, gas and diesel are apples and oranges, but wouldn't the same principles apply?
#41
09-16-2013, 06:19 PM
The main reason your former truck got 20mpg was compression ratio.
Cummins = ~17:1
V10 = 9.2:1
Installing 3.54 gears is going to result in the engine lugging which will likely result in worse mileage, not better.
I came from a Cummins myself and, while I do miss the high teens unladen mileage, it's nice to have a quiet, trouble-free, turn-key-and-go rig again. I love my V10.
Cummins = ~17:1
V10 = 9.2:1
Installing 3.54 gears is going to result in the engine lugging which will likely result in worse mileage, not better.
I came from a Cummins myself and, while I do miss the high teens unladen mileage, it's nice to have a quiet, trouble-free, turn-key-and-go rig again. I love my V10.
#42
10-13-2013, 11:19 AM
4.30's installed, not what I expected
Got the 4.30 in and had I paid any more for it I would have been disappointed. $350 for the rear end, $80 in gear oil, $50 for new backing plates, $20 for a hardware kit, and $50 for new seals ---> $550 in all. Around town you can't tell any difference from the 3.73's. Pulling the camper was very slightly better, but not really worth the effort. It's got 175,000 on it and that may be part of the problem, but it may be tune time now.
#43
10-14-2013, 12:26 AM
Senior User
Got the 4.30 in and had I paid any more for it I would have been disappointed. $350 for the rear end, $80 in gear oil, $50 for new backing plates, $20 for a hardware kit, and $50 for new seals ---> $550 in all. Around town you can't tell any difference from the 3.73's. Pulling the camper was very slightly better, but not really worth the effort. It's got 175,000 on it and that may be part of the problem, but it may be tune time now.
what size tire are you using ?
#44
10-14-2013, 09:08 PM
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Got the 4.30 in and had I paid any more for it I would have been disappointed. $350 for the rear end, $80 in gear oil, $50 for new backing plates, $20 for a hardware kit, and $50 for new seals ---> $550 in all. Around town you can't tell any difference from the 3.73's. Pulling the camper was very slightly better, but not really worth the effort. It's got 175,000 on it and that may be part of the problem, but it may be tune time now.
still has to pull a lil better than stock from a standing start, and should be a lil easier on the trans, when on the hills towing. but not a huge jump. the v-10 do make power a lil higher in the rpm band though.
#45
10-19-2013, 09:53 AM
I am running stock size tires.
You can't say it's 300 RPM more, it's variable with speed. Instead it's a 15% increase in RPM. Said another way, I have 15% more mechanical advantage over the rear tires. The higher the speed without shifting, the higher the difference over the 3.73's. It just so happens you are right though, with 3.73 I was running about 2,000RPM at 70MPH, now it's 2,300RPM at 70.
I almost think that 4.56 gears would get me where I want it. It seems we start building steam at 2,500, 4.56 gears would get pretty close to that.
I'm not wanting to do another rear end change so I think we'll look instead at improving the engine performance.
You can't say it's 300 RPM more, it's variable with speed. Instead it's a 15% increase in RPM. Said another way, I have 15% more mechanical advantage over the rear tires. The higher the speed without shifting, the higher the difference over the 3.73's. It just so happens you are right though, with 3.73 I was running about 2,000RPM at 70MPH, now it's 2,300RPM at 70.
I almost think that 4.56 gears would get me where I want it. It seems we start building steam at 2,500, 4.56 gears would get pretty close to that.
I'm not wanting to do another rear end change so I think we'll look instead at improving the engine performance.