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The finial ratio is 6.14 uses a 3.07 chunk. The finial ratio of 7.80 uses a 3.90 chunk.
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FMTV High Speed Gears
- Thread starter NDT
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- 1,425
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I am trying to locate one of these MX-810 to verify the interchangeability of these gear sets.
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You can forget this idea, there is nothing in the civilian market that interchange with the RF-611
coachgeo
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Murphy's law states you will find them....... a lot of them..... and they will end up being significantly less costly than what I just paid for my 3.07's lol
deshet
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I called over to Meritor just now and spoke with there Tech support department.
They said that need a meritor part number from the axle not a military part number.
He said that the axle should have a meritor tag on it.
He said that they do sell kits to change the ratios but they need a part number to match everything up.
He could not cross reference any of the numbers I gave him and he said the military part numbers don't work in his system.
(RF-611) he said that is the beginning of a understandable part but it should have 4-6 more letters and numbers
This may be too expensive or turn up nothing but hopefully it produces something.
Thanks
They said that need a meritor part number from the axle not a military part number.
He said that the axle should have a meritor tag on it.
He said that they do sell kits to change the ratios but they need a part number to match everything up.
He could not cross reference any of the numbers I gave him and he said the military part numbers don't work in his system.
(RF-611) he said that is the beginning of a understandable part but it should have 4-6 more letters and numbers
This may be too expensive or turn up nothing but hopefully it produces something.
Thanks
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If a manufacturer gets pestered too any times by someone chasing obscure and non-profitable information, the result is the door being slammed for future information of a more necessary nature. Steve knows his axles.
redman333
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Since I’m fairly new to the forum and don’t know people yet, don’t take this the wrong way but how do you know?
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I know people usually swap the whole pumpkin because thats what was available. Can ring and pinion sets be made up and swapped in?
ramdough
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Steve is a custom axle manufacturer. He uses these axles for parts and then rebuilds them for customers needing special axles...... mud buggies, crawlers, etc.....
He has been trying for a long time to find compatible parts so he can make more variants of Frankenstein’s axles......
He has looked extensively, but that does not mean you should not try.....the more researchers the better IMO.
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redman333
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Gotcha thanks for clarifying. Wasn’t trying to offend anyone was just curious. We are a meritor dealer where I work but not very familiar with the military axle sets. If I can gather some part numbers I can talk to our meritor rep and see if he can come up with some part numbers.
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spankybear
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Well I hope sometime works out... I really want a set of the higher gears for my truck...
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Guys, the ring and pinion gearsets are a current item for Meritor. Vendors such as FMTV Truck Sales and MTP Drivetrain can also install these for you, either drive in drive out, or send your chunks to them.
pontiac62
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They currently don’t have anything in there ebay store. Last week or so they had the door handle upgrade kit should have bought it them.
I guess you would have to call or email them about parts.
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M1081 LVAD
deshet
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Do you have an idea on pricing? Can I get lower then a 3.07.....it would be nice to maintain actually highway speeds if possible vs hoping to get to 70.
Thanks
scottmandu
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I got a quote from them and it was $3200 per gear pair new from Meritor and it would take 120 days.
There are no Meritor gears with a ratio higher than 3.07.
scottmandu
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deshet
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Can you post the part numbers that you were quoted to make this easier in the future to track down?
Thanks
deshet
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Around here Highway Speed starts at 75 in some areas. If 75 sounds like 58 does know then I will back out of throttle to at least 70.
Thanks
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3.90 to 3.07 is a 27% increase.
So 58 MPH becomes 73.7 MPH. 50 MPH becomes 63 MPH. 45 MPH (about where mine shifts to 7th) becomes 57 MPH.
So 58 MPH becomes 73.7 MPH. 50 MPH becomes 63 MPH. 45 MPH (about where mine shifts to 7th) becomes 57 MPH.
coachgeo
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take back routes. Even with high speed gears.. to keep engine at a its best rpm range you wont be much out of 55mph But.... it is not like they will run you over on the Interstate. 55mph is probably MINIMAL legal speed on Interstate and honestly IMHO it is safer to go (in correct lane) 55-60mph on interstate where folk can more easily get around you than to go 55-60 on two lane back-road where 65mph+ is norm and folk are trying to get around you. Just my .02...... Others disagree and say stick to back roads.
Ill have 3.07's but will stick with 55-60 to keep engine and MPG happy.
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