Front HUB conversion vs MPG

[bellyup039]

Has anyone installed the hub conversion kit from Dynatrac?

DYNATRAC Stage 2 Free Spin Heavy Duty Hub Conversion for 2000 to 2008 Dodge Ram Trucks - Dynatrac Dodge FSHK 94-99

I know for a fact that they work great on Jeeps. No expirence on the Ram yet.

If it gives us 1 to 2 mpg, I'll do it. Every mile helps out.

Give me your opinion, good and bad.

Thanks Bellyup

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2008 Mega cab 6.7 SXT BADP GEN 2 4"Down Pipe, EGR Unplugged Edge Juice w/Attitude 18.4 mpg on #1 setting

[slagburn]

I have that kit on my truck, can't say that I noticed much in the way of a mpg increase but I tend to drive a bit on the fast side - will know more tomorrow after a long highway trip with the kit on.

The only two bad things that I can think of are the price and how much the hubs stick out past the wheels - not a big deal for me but a lot of folks don't like it in terms of looks.

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07.5, 6.7, Auto, QC, 4x4, Lots of gauges - ISSPRO (Pyro, Boost, Trans Temp) PriCol Optix (Fuel Pressure Lift/Rail) AutoMeter (Oil Pressure) - Dynatrac Free-Spin Hub Conversion Kit - RETRAX bed cover - homebrew shaved bluetec badge - plugged up EGR - Baldwin BF1212 water separator and CAT 1R0750 fuel filter - MSD Dashhawk - Baldwin B164 Bypass Filter

[bellyup039]

thanks, keep us advised of the mpg!

I need all I can get. $$$$$$$$$

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2008 Mega cab 6.7 SXT BADP GEN 2 4"Down Pipe, EGR Unplugged Edge Juice w/Attitude 18.4 mpg on #1 setting

[dummy]

Originally Posted by slagburn

I have that kit on my truck, can't say that I noticed much in the way of a mpg increase but I tend to drive a bit on the fast side - will know more tomorrow after a long highway trip with the kit on.

The only two bad things that I can think of are the price and how much the hubs stick out past the wheels - not a big deal for me but a lot of folks don't like it in terms of looks.

Dynalock hubs shave at least an inch off the stickout length. Spendy, but most 35-spline locking hubs are.

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2007.5 Ram 2500 MegaCab 4x4, 6.7L, 68RFE, 3.73 gears, SLT, Line-X, Snugtop Extra Vision shell, Bilstein 5100s, 285/75-17 Toyos, Walker Evans wheels, Amsoil lube & bypass filter, PML rear diff cover & tranny pan, Dynatrac Free-Spin, Arab's kid's college fund

[Dawg]

IMO : it would have to save a whole lot of fuel to have to get out in a mud hole or rain to lock the hubs .

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2007 3500 mega cab ctd 6 speed manual drw 6.7 3:73 rears 4x4
had a 2004 2500 ctd 4x4 auto
had a 1996 ctd 2500 4x4 auto

[slagburn]

Hand calculated 16.8mpg for a 300 mile trip with 2 regens averaging 80mph with ~700lbs of stuff in the bed, previous trip was 16.2 under about the same conditions but with only half of a regen and no stuff in the bed. Used the exact same pump each time. First trip was with about 2300 miles on the unit, second with 3500 miles - still on the AU flash.

I've experienced a unit bearing failure on a previous vehicle, luckily for my wallet the vehicle was under warranty but it was a huge inconvenience regardless and if it hadn't been under warranty my wallet would have been very inconvenienced, so for me the price of manual hubs and serviceable bearings is just insurance against not having to deal with a unit bearing failure in the future, if there happens to be an mpg increase in the conversion then I'll take that to and I'll take it now.

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07.5, 6.7, Auto, QC, 4x4, Lots of gauges - ISSPRO (Pyro, Boost, Trans Temp) PriCol Optix (Fuel Pressure Lift/Rail) AutoMeter (Oil Pressure) - Dynatrac Free-Spin Hub Conversion Kit - RETRAX bed cover - homebrew shaved bluetec badge - plugged up EGR - Baldwin BF1212 water separator and CAT 1R0750 fuel filter - MSD Dashhawk - Baldwin B164 Bypass Filter

[Cyberous]

Originally Posted by slagburn

The only two bad things that I can think of are the price and how much the hubs stick out past the wheels - not a big deal for me but a lot of folks don't like it in terms of looks.

Any chance you could post a picture of how far they stick out?
I can't seem to find any pictures of the kit installed.

I've been looking at the 30 spline EMS kit. It's $500 cheaper and you can buy them direct rather than paying a retailer's mark up.
They offer a 35 spline kit for people who really want a stronger kit for $100 more than the 30 spline kit.

00+ Dodge 2500/3500 SRW Hub Conversion Kit [HC-00D-30] - $1,375.00 : EMS Offroad, When You're Ready For The Next Step

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2008 Laramie Quadcab 4wd 3500 shortbed

[Bobcat698]

I know someone on DTR said it was a solid 2MPG gain on the 5.9's.

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Pure Diesel Power
715-254-1833
2008 Dodge 3500 6.7L Cummins G56
1999 Dodge 3500 5.9L Auto DD
1998 Dodge 2500 12V CTD Puller
1997 Dodge 2500 CTD
1996 Dodge 2500 CTD DD

[yoda]

i plan to do this conversion, like slagburn said...mainly for the rebuild able/re-grease able bearings...but if i gain some mileage as well, bonus!

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05 2500 qc, sb, 4x4, 6spd, 3.73, silencer MIA, mp8, afe stg 2 pg7, 4" dynomax bullet muffler to 5" turnouts, ranch hand bumper, HBS 2" leveling kit, prodigy controller, b&w goose neck, 300 HP/540 TQ feb 08, looking for donations

[kinggrantz]

I plan on doing it when one of my seals give out. I try not to replace stuff until it breaks or is about to break. I have read that they do give you mpg's. If a seal or bearing goes out I can just buy that on not the whole hub again. As for having to get out and lock and un lock the hubs it's something I have always had to do in all of my other 4x4's in the past. So it shouldn't bother me that much.

[megadually]

That EMS kit looks good. I have 176,000mi. on my factory hubs.

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6/06, Mega Cab, 4x4, g56, 3.73's, S-06, 85hp sticks, PPE Dual Fuelers, ARP's, HTT 62/65/13ss, Magnaflow SS 5" TB, ATS ex/man, cfm+, FBD grid delete, FASS 150/95, 1R-0749, Quad BF, PG-7, PRXB, SB 3250 sh,dd, Fluidamper, air bags, fastcoolers, mag-hytec diff covers.

[slagburn]

Originally Posted by Cyberous

Any chance you could post a picture of how far they stick out?

Takes a bit of getting used to visually, might look better with larger wheels / tires.

I've whacked the passenger side one on a few tall curbs too.

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07.5, 6.7, Auto, QC, 4x4, Lots of gauges - ISSPRO (Pyro, Boost, Trans Temp) PriCol Optix (Fuel Pressure Lift/Rail) AutoMeter (Oil Pressure) - Dynatrac Free-Spin Hub Conversion Kit - RETRAX bed cover - homebrew shaved bluetec badge - plugged up EGR - Baldwin BF1212 water separator and CAT 1R0750 fuel filter - MSD Dashhawk - Baldwin B164 Bypass Filter

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Last edited by slagburn : 09-01-2008 at 10:37 AM.