Urgent help, please Rtoo 14613 vs rto 9513

Discussion in 'Trucks [ Eighteen Wheelers ]' started by kcabbie, Apr 18, 2015.

  1. kcabbie

    kcabbie Bobtail Member

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    Apr 18, 2015
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    Good evening, this is my first time on the forum hopefully someone can give me some insight. I know no drivers personally so my only choice is to ask you guys.


    I know its unorthodox, but i have a 1993 Dodge w350. Currently has a weak getrag 360. I am on the verge of over powering this transmission(they are not known for being able to take a lot of abuse). I will be towing 29k lbs on a regular basis. Another reason I am going this way is because of the heavy weight, but in some of the large hills I will be encountering. Being able to select the perfect gear to keep my egt's low as possible. Now I have given you the why hopefully i can make the first big step of this project.

    I have found a well priced Rto 9513(400 bucks) that can be delivered to me, tomorrow. Only tomorrow! So if i want it, i have to know by tomorrow.
    I need the high .62 od ratio found in the Rtoo's and i understand that is easy to achieve with the 9513. Only reason I wish to have anything else is because i would like to have the ability to pre select before shifting to the next gear. Seems like it would be a PIA to shift up, then switch back to direct. then back up again.
    Not to mention the noisy coarse cut gears found in the rto's

    Next option is a Rtoo 14613. From reading on eatons website it is basically the same size as the 9513(actually 2" shorter and 1lbs less!)
    I know the 14613 is available in the rtlo, which is what I would really like to have. I also know that they did not make a RTLOO, so to achieve that(if possible) I would have to do some gear swapping.

    My question is; can I buy the Rtoo and convert it to a RTLOO? Seems like the best of both worlds!

    Thanks very much for any info.


    Kasey
     
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  3. kcabbie

    kcabbie Bobtail Member

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    Apr 18, 2015
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    Little update.. guy wants 1700 for the 14613 and its not rebuilt(going to rebuild what ever I install in the truck). So thats another 600 bucks.. gonna pass on that.

    I guess that the only information i need at the moment is the 9513 a good trans for my needs? I won't be splitting every gear 90% of the time. Is there anything I can do to quieten down the od gears besides new bearings? is it possible to replace the gears(on all three shafts) with the finer cut gears out of a different trans?
    And is it possible to make it a rtlo?

    Thanks again for any help.
     
  4. SL3406

    SL3406 Medium Load Member

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    The RTLO has a .73 ratio. If you need the .62 the RTOO is the only option. These transmissions typically have a 2" input shaft and use a pull type clutch. Do you have that part worked out?
     
  5. kcabbie

    kcabbie Bobtail Member

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    Apr 18, 2015
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    Likely use a 1.5" or 1.75" input shaft and if I can Work out the hydraulic slave cylinder on the pull style I would prefer that because they are easier to come by. Also rated for more torque. But the push style is not to hard to come by, but only rated for 500 ft lbs of torque. Even turning up my 6bt with required add ons would 500 ft lbs of torque pulling a max of 30k lbs be pushing that clutch? I know they are rated for much much more.

    Thanks for the reply
     
  6. BoxCarKidd

    BoxCarKidd Road Train Member

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    Lots of issues: To my knowledge bellhousings on RT transmissions come in two widths and the one on your 6bt is surely smaller than either. The smaller width housing is available for the 95 series, but hard to find, and never produced for 12 series and up. Maybe not ever made for 10 & 11 series either. A flywheel housing for a 6bt with the next larger housing was probably made for some commercial applications but may require a different flywheel. If not the setup would require a custom adapter. Input shafts: 95 series were ava. with 1.75 & 2" shafts but smaller or even 1.75 in a 10 series or up is questionable. The end on the input shaft is larger than the OD. of the 6bt pilot brg. Clutch: If you do not have a pull type with clutch brake that may be a problem to add to all the other clutch problems. Linkage: Would probably try a Volvo Hyd. or air over Hyd. set up. Fuller also made some 8 series, maybe 6,s & 7,s that might work better. I you completed this by the time you are finished down time and parts cost would go a long way toward a larger used truck.
     
  7. Cetane+

    Cetane+ Road Train Member

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    4x4, or 4x2? It would be cheaper to buy a higher rear than to go and change all the gears in a fuller. That is crazy high overdrive ratio.
     
  8. Cetane+

    Cetane+ Road Train Member

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    Why do you need a .63 OD? At 2100RPMs, with 4.10 rear, 636 revs per mile (235/85R16), and .73 OD, your road speed is 66 MPH. You dont want to run that small block diesel lower than that. I think you have gotten some bad info.
     
  9. kcabbie

    kcabbie Bobtail Member

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    Apr 18, 2015
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    Thanks for the reply guys.

    I currently have have 3.55 gears with 31" tires and my od gear is .74

    The high od is not the biggest reason I am changing, that would be the huge gap between gears. When I'm unloaded it will pull the .64 od gear without any trouble. I drive at 85 mph when not towing. This will bring my rpms down from 2200 to about 1950 and give me some room for the new toll road in austin (90 mph). As long as egts are monitored and engine temp is good there is no problem with it. I'm only running 14 degrees of timing and a small amount of fuel, there fore cylinder pressures will also be fine.

    The allison 1000 which is the 6 spd that comes in 2006 plus duramax's has a od of .61?

    There are plenty of bell housings that bolt directly to the back of a cummins 6bt/4bt in sae #3, 2, and 1. I will be using the number 2 with a 14" clutch.
     
  10. kcabbie

    kcabbie Bobtail Member

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    Apr 18, 2015
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    I'm looking at about 1400(if it doesn't need a rebuild, we will see today) total cost. Transmission is 400, bell housing is 200, clutch is 400-500, drove shaft work will likely be around 250. The price for a dual disc clutch for a nv5600(more common swap) is 1800! That's not including the transmissions!

    Increasing the rear end ratios will only make the gaps bigger and do not take care of the weak transmission. If I'm going to go through the trouble of putting a fuller in I want to be happy with it.
     
  11. Cetane+

    Cetane+ Road Train Member

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