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ECO Hubs Who needs 3:07 gears?
- Thread starter Xengineguy
- Start date
Must be a difference with the older controllers. I don't experience exhaust brake issues at all. There's actually a really steep grade near my house that is between me a groceries many times. Coming down that hill I might have to use the brakes for a couple seconds once to bring the speeds down to where I want it then the exhaust brake and trans gear keep it from accelerating.
I'll have to pay closer attention to what speed it disengages at as I'm slowing down.
If you are talking about crawling speeds only then using the brakes isn't causing that much wear at those speeds so it doesn't overly concern me.
I'll have to pay closer attention to what speed it disengages at as I'm slowing down.
If you are talking about crawling speeds only then using the brakes isn't causing that much wear at those speeds so it doesn't overly concern me.
I think it was lost chain who put up a video showing it hold lockup/ex brake down into second gear. where it drops out in 2nd will probably be a factor of how fast you are decelerating. I shot a crappy video of my scan tool looking at the F/lockup solenoid and mine currently drops out right with the shift to 2nd, but I don’t have any weight on yet, so it slows pretty fast when I roll off the throttle even without the ex brake…
Try 50-55 instead. You're junk is big and heavy. Congrats on your sizeable gear
Tire pressure? I run the M1088 settings so 81 psi.
Guessing at that weight the best it will get under ideal conditions is probably around 8 or just under. 7.8 to 8.2 would be believable for that combo if all the stars align. But without the hubs you would probably be even lower than your most recent calculations.
From my experience it does seem that the MTV takes a hit of 1-2 MPG or so from the extra axle gear out back. The 4x4 trucks do the best with some guys reporting 11-12. I myself was around 10.2 but I should update that test. It's been a while.
But I don't want to go slower! I don't really care about the mpg (too much). Running in the 80s psi, I forget the exact value (I think I copied the 1088 values). It cruises nicely at 60-65, well 70-75 too but I "feel" like going that speed may be getting into the unsafe category. We aren't in a rush anyways.Try 50-55 instead. You're junk is big and heavy. Congrats on your sizeable gear
Tire pressure? I run the M1088 settings so 81 psi.
Guessing at that weight the best it will get under ideal conditions is probably around 8 or just under. 7.8 to 8.2 would be believable for that combo if all the stars align. But without the hubs you would probably be even lower than your most recent calculations.
From my experience it does seem that the MTV takes a hit of 1-2 MPG or so from the extra axle gear out back. The 4x4 trucks do the best with some guys reporting 11-12. I myself was around 10.2 but I should update that test. It's been a while.
Of note, that mid axle is always about 15f warmer than the front and rear diffs. I assume some extra energy put into that torque divider. May be where some of that mpg go.
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Junk is big and heavy....if only, my wife says otherwise.Yea thats a lotta weight… have you taken individual axle weights? Balance too far outta wack will really show tire wear running a single CTIS pressure across all 3 axles…
”Your junk is big and heavy” Waaaay TMI…
Nope I haven't. Best info I have is the little tire whiskers on the new tires, they all wore off very evenly. When going low pressure all the tires bulge out the same - best as I can eyeball.
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Try 50-55 instead. You're junk is big and heavy. Congrats on your sizeable gear
Tire pressure? I run the M1088 settings so 81 psi.
Guessing at that weight the best it will get under ideal conditions is probably around 8 or just under. 7.8 to 8.2 would be believable for that combo if all the stars align. But without the hubs you would probably be even lower than your most recent calculations.
From my experience it does seem that the MTV takes a hit of 1-2 MPG or so from the extra axle gear out back. The 4x4 trucks do the best with some guys reporting 11-12. I myself was around 10.2 but I should update that test. It's been a while.
Thanks Keith for the real world testing, good info.
missed u in the midwest!
Any of you folks running 14R20's with ECO hubs? Contemplating switching over, but a little concerned about further raising the gearing. Also curios about longevity and reliability of the Goodyear ORD's for those with experience with them.
I've been running that combo for ~7000 miles now and have been fairly happy with it. I only drove my truck maybe 5 miles with the original tires and hubs so I can tell you my experience with the Ecohubs/14.00R20s, but don't have a good basis for a comparison with the stock tire size.
With the original 275 hp tune it drove great for the most part and the only time I was left wanting was on long steep uphill grades where it would shed a ton of speed and struggle a bit, it is significantly better now with 370 hp. Acceleration around town and in traffic was fine but not inspiring, also much improved with 370 hp. I haven't done any low speed crawling yet so I can't comment on how that is affected by the taller tires.
The speedometer required a 5.6% adjustment to line up with GPS speed: (62618ppm/1.056)/2=29649ppm with Ecohubs. Fuel mileage has been great for what it is, I average around 10mpg. They seem to be wearing well, and at this rate I'd expect to get 30000+ miles out of them.
Minor issues:
*The spare doesn't fit well in the carrier as can be seen in the photo below. The crane arm will eventually need to be extended 3" to 4" for the tire to fit flush with the side of the box.
*They are a bear to balance, although that isn't unique to these tires and is likely also due to wonky steel wheels.
*They are quite loud at highway speeds, although again that is not unique to these tires. Tire noise is now the loudest sound in the cab since I've quieted down other parts of the truck with insulation and the Ecohubs.
*The Goodyear OTR tires sold by ColonyTire on Ebay are blemished/factory seconds with tread repairs. When I bought my set they weren't advertised as such, so I had to negotiate with them to get some money back. It looks like they are properly advertised now. The repairs do seem to be holding up ok so far.
Thanks, the noise may be the deciding factor for me. Tire noise really isn’t an issue with the stock MVT’s.
Colony Tire FTW (for the win). Had a lot of great success with them over the years. Granted, I used to live 300 miles away. Now that I'm closer to 3000 I'm not looking forward to the shipping.
Skyhawk13205
Well-known member
Eco Hubs tear down report.
Driven about 3k miles, most highway, some snow and off highway/road conditions, several times had TQ stalled in 1st gear while towing another 1078 that got stuck in a ditch. Driving duration of 2 years. Repacking rear axle bearings, found splines to be in good condition. No evidence of bolt distortion into wheel hub. Checked bearing preload with torque wrench, axle nut started to rotate at 280 inch lbs. removal of axle nut was below 260 inch lbs. All torque within TM specs. Verified lock collar maintains bearing preload. Noted that lock collar was not fully seated against axle nut, found lock collar about 1/16” separation from axle nut dowl and lock collar bore. could be a possible installation error.
Eco hubs is a very good performer and is well engineered. The lock collar works well and the splines and adapter plate maintain integrity. As with all systems in this truck preventative maintenance is required. I would suggest a 3-5 year interval of inspection which typically lines up with CTIS seal and inner bearing repacking intervals.
Driven about 3k miles, most highway, some snow and off highway/road conditions, several times had TQ stalled in 1st gear while towing another 1078 that got stuck in a ditch. Driving duration of 2 years. Repacking rear axle bearings, found splines to be in good condition. No evidence of bolt distortion into wheel hub. Checked bearing preload with torque wrench, axle nut started to rotate at 280 inch lbs. removal of axle nut was below 260 inch lbs. All torque within TM specs. Verified lock collar maintains bearing preload. Noted that lock collar was not fully seated against axle nut, found lock collar about 1/16” separation from axle nut dowl and lock collar bore. could be a possible installation error.
Eco hubs is a very good performer and is well engineered. The lock collar works well and the splines and adapter plate maintain integrity. As with all systems in this truck preventative maintenance is required. I would suggest a 3-5 year interval of inspection which typically lines up with CTIS seal and inner bearing repacking intervals.
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Thank you for the feed back! Great to hear everything checked out good. You never know what the long term wear and tear
is going to do, until you get units in the field . Real word testing. Thank you again. Mike
is going to do, until you get units in the field . Real word testing. Thank you again. Mike
Figure one hour or a little more for the first hub then 1/2 hour to 45 min for each hub after that.
Unless your extremely heavy the off road and steep grade is very good. The torque converter gives back
a lot of torque that the Eco Hubs would seem to take away. Dont forget you have first gear in “mode” you
can now actually use.
Unless your extremely heavy the off road and steep grade is very good. The torque converter gives back
a lot of torque that the Eco Hubs would seem to take away. Dont forget you have first gear in “mode” you
can now actually use.
Keith Knight
Well-known member
The biggest downside is with eco hubs and original gears even in mode 1st gear down steep slopes you’re ridding the brakes way more. With just original gears mode 1st does a good job at keeping to a crawl down steep grades.
Agreed. Loaded, towing, or etc downhill must be "clentching" if you don't have an exhaust brake.