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Old 03-19-2017, 03:48 PM   #721
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What rear end gears does it have? 3k at 70 sounds shitty
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Old 03-19-2017, 03:56 PM   #722
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Quote:
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1800-2100 rpm on highway for best efficiency. These motors are not meant to rev...
That is sort of what I thought. I think it was around 2500rpms at 69mph.

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What rear end gears does it have? 3k at 70 sounds shitty
3.73 rear end.
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Old 03-19-2017, 09:15 PM   #723
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Old 03-19-2017, 09:42 PM   #724
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Omgyes

Omgyes
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Old 03-19-2017, 11:39 PM   #725
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That is sort of what I thought. I think it was around 2500rpms at 69mph.



3.73 rear end.

Are you sure you don't have 4.10 gears?

Mine is 2000 F350 2WD CCLB DRW 6 Speed and sits at around 2500 at 70 but I know I have 4.10 gears.
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Old 03-20-2017, 07:57 AM   #726
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Are you sure you don't have 4.10 gears?

Mine is 2000 F350 2WD CCLB DRW 6 Speed and sits at around 2500 at 70 but I know I have 4.10 gears.
I am not positive on the 3.73 gears, that is more what I remember seeing when I looked at a vin decoder for the vin of the truck. I guess I could go try to figure out which gears based on all the tags on the truck and I may do that in the near future.
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Old 03-20-2017, 08:33 AM   #727
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You won't hurt it, but you will definitely notice a big decrease in fuel economy.
I'm a little surprised at your rpms at that speed as well.
I cruise at 70-75 at about 2500.
Of course, mine has an auto trans.
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Old 03-20-2017, 08:48 AM   #728
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I am not positive on the 3.73 gears, that is more what I remember seeing when I looked at a vin decoder for the vin of the truck. I guess I could go try to figure out which gears based on all the tags on the truck and I may do that in the near future.
Here. Easy to find by looking at the door tag on the Driver side. I think the manual trans came with 4.10 unless ordered by option.

Identify Your Ford Truck Axle From The Door Sticker : Blue Oval Trucks
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Old 03-20-2017, 08:56 AM   #729
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Here. Easy to find by looking at the door tag on the Driver side. I think the manual trans came with 4.10 unless ordered by option.

Identify Your Ford Truck Axle From The Door Sticker : Blue Oval Trucks
I will check that out this afternoon when I get home to see which gears I got.
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Old 03-20-2017, 09:16 AM   #730
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I will check that out this afternoon when I get home to see which gears I got.
If you end up having 4.10 gears you can always go to a taller rear tire @ 34" which would effectively change it (from stock tires). The PO may have put shorter tires on it to save some $$. Check those also.
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Old 03-20-2017, 12:58 PM   #731
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If you end up having 4.10 gears you can always go to a taller rear tire @ 34" which would effectively change it (from stock tires). The PO may have put shorter tires on it to save some $$. Check those also.
After I bought my Dodge, I discovered the PO had put shorter tires on it... don't know why, unless they were really cheap. A tire swap does get pricey on a dually...
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Old 03-20-2017, 01:03 PM   #732
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After I bought my Dodge, I discovered the PO had put shorter tires on it... don't know why, unless they were really cheap. A tire swap does get pricey on a dually...
​​​​​​​Tires on the one I bought are less then a year old and have the warranty from Discount Tires. I have not even looked at what replacement tires cost yet, I think I am scared to.
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Old 03-20-2017, 01:06 PM   #733
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If you want to get ******* awesome tires for a dually that will last 10 years and over 100k miles, the answer is Michelin XPS Rib. Full commercial style tires with full stainless steel sidewall reinforcements and everything. Only downside is that they are almost 250 a pop but when you consider how long they'll last it's worth it to bite the bullet.
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Old 03-20-2017, 01:16 PM   #734
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​​​​​​​Tires on the one I bought are less then a year old and have the warranty from Discount Tires. I have not even looked at what replacement tires cost yet, I think I am scared to.
At the end of the day, other than lowering the cruise rpm, you'll only save about 1-2mpg. I'd just live with it for a while anyway.
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Old 03-20-2017, 04:57 PM   #735
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Originally Posted by Arca_ex View Post
If you want to get ******* awesome tires for a dually that will last 10 years and over 100k miles, the answer is Michelin XPS Rib. Full commercial style tires with full stainless steel sidewall reinforcements and everything. Only downside is that they are almost 250 a pop but when you consider how long they'll last it's worth it to bite the bullet.
Great tire, but a no-go for snow or freezing temps...

I've had really good luck in the past with BFG Commercial T/A, but I'm not sure if that tire's still in production. Currently running Wranger Duratrac on my Dodge, and I love them in snow and dirt, but they are getting noisy on the highway. Only have ~10k miles on them, so I have no idea about longevity, but I probably will buy a more highway oriented tire next time 'round anyway. Hopefully a long way off, 'cause 7 tires at $200+ is not fun!
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Old 03-20-2017, 06:31 PM   #736
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Michelin LTX MS2. 15/32nds tread new and an 80k mileage warranty, sons.

e: You should be way lower than 3k at 70mph. My truck has a similar OD gear and a shorter tire and I only turn ~2150rpm at 70mph, ~2600rpm at 80mph. My truck definitely has 3.73s. If you are turning 3k at 70, it almost sounds like someone put 4.88s in that truck.
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Old 03-20-2017, 07:53 PM   #737
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Quote:
Originally Posted by Arca_ex View Post
If you want to get ******* awesome tires for a dually that will last 10 years and over 100k miles, the answer is Michelin XPS Rib. Full commercial style tires with full stainless steel sidewall reinforcements and everything. Only downside is that they are almost 250 a pop but when you consider how long they'll last it's worth it to bite the bullet.
Not many know this, but you can actually retread an XPS Rib as well. Has steel casing plies (like a big rig tire).
Otherwise, LTX M/S2 is awesome. But I'm a little biased.
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Old 03-21-2017, 12:59 AM   #738
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I put some 10 ply coopers on my dodge dually was about $650. not that bad. I think most of us should be more worried about dry rotting tires more than mileage at least that's was my issue. Now with my Tacoma I have some dry rotted BFGs I'll be changing out soon before I'm towing a lot.
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Old 03-25-2017, 04:45 PM   #739
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Is the XPS a much heavier tire?
can you get some real pressure in there?
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Old 04-04-2017, 04:20 PM   #740
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"flame suit on"
I am going to experiment with flat towing my car to events, I figure that the most likley things to strand me at a track event would be an engine or trans faliure... initially started looking for an open aluminum trailer But i alerady have 4 vehicles, a kart, utility, tire and pop up trailers that are all garaged right now and need to draw the line somewhere (maybe i can convince my wife to sell the pop up LOL) so desided to try this first and get a trailer if this does not work out.
Looking at the RV forums Miatas are regularly towed without problems, the trans output shaft it is supported by two sealed ball bearings so i figure that it will be ok lubrication wise for 200mi towing that are in the plans.
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