Gear Splitter

[stumps]

source? and which model?

edit: ah, you got that from this post, yes? i was going off of this info, but understand that the TM is likely more correct for the -A than the link.

however, does the TM cover the 3053 or the -B model? because i have the 3053 and i don't believe it'd move w/ a ~5:1 first, rather i believe it is quite a bit higher and closer to the 5.9:1 as noted in the link.

other sources to confirm this?

TM9-2520-246-34 shows a 3053A as having a 5.02:1 first gear.

-Chuck

 

[booger]

Travis,

I concur. I understand the characteristics of the MF. That's why I started with the M35 and not a Big Block Chevy rig. I too am using my M35 for 90% off road. I live in a very rural area ( no stop lights, a hand full of stop signs and one paved road ).

I have been watching and reading all of the power steering, hydrolic assist and full hydrolic threads for about a year now. I agree that full hydrolic would be the best ( totally eliminates bump steer problems when lifting the truck ( I plan on a spring lift of about 4 inches ) but I'm a little concerned about it being legal on the street. The local athorities say "sure, what ever" but the big time State Cops might put me through the ringer over it.

I realize I'm not on the original topic. And, there are more issues I'm dealing with. Like; Getting the weight 50/50 ( that could be a challenge) I am going to mount the winch on the back for one thing. Move the batteries? move the fuel tank?

Do I need to discuss this somewhere else...not sure of the proper proceedure.

 

[mudguppy]

TM9-2520-246-34 shows a 3053A as having a 5.02:1 first gear.

-Chuck

yeah, i know, Chuck....

what about the other 2 models; what TM are they in?

 

[tm america]

i was refering to a 3053a which is what i have in my truck i think i seen that ratio in a catalog for boyce i didnt dig up the tm .sorry it know it was close to that 5.02 5.1 whatever it's pretty close thatefact is you would go from a 5.?? to 4.?? it would be a full point of drop in gear ratio which would be a great help .i would be going for less shifts in my truck starting off in second and not having to use a gear that isnt syncronized .even though the gear splitts are the same gear ratio is very important the wrong final drive ratio can add seconds to your et in the 1/4mile

 

[mudguppy]

... but I'm a little concerned about it being legal on the street. The local athorities say "sure, what ever" but the big time State Cops might put me through the ringer over it. ...

understand that no matter how many people have said this, no one has ever posted real documentation that hydraulic steering is illegal for on-road use. i've yet to hear of anyone even hearing about someone else that has supposedly seen real documentation.

... I realize I'm not on the original topic. And, there are more issues I'm dealing with. Like; Getting the weight 50/50 ( that could be a challenge) I am going to mount the winch on the back for one thing. Move the batteries? move the fuel tank?

Do I need to discuss this somewhere else...not sure of the proper proceedure.

probably. that wouldn't be a bad thread to start, though, since there are lots of bob'ers around here now. might make some interesting discussion. i'm in.

 

[booger]

...oops, did I say hydrolic? ...several times. I meant hydraulic. Guess I should use the spell check

 

[tm america]

ya i would start a new thread if you are going on to a new subject it makes it easier to search so people can access usefull info easier

 

[stumps]

yeah, i know, Chuck....

what about the other 2 models; what TM are they in?

I wish I could help, but I can find nothing that shows the 3053, or the 3053B. Only the 3053A, and the 3052.

How sure are we that they existed in deuces?

-Chuck

 

[tm america]

anyone know the gear ratios of the at545 or at1545p that was used in the a3 that would seem to be even better for accelleration if the gears work out?since the torque convertor is a torque multiplier

 

[booger]

That might be a good idea. How long is it? Could you put it in without moving the transfercase.

 

[tm america]

same lenght as the stock trans goes right in without moving the transfer case.it is a four speed direct drive but i dont know what the other ratios are

 

[mudguppy]

I wish I could help, but I can find nothing that shows the 3053, or the 3053B. Only the 3053A, and the 3052.

How sure are we that they existed in deuces?

-Chuck

because the tag on my trans says 3053.

 

[mudguppy]

same lenght as the stock trans goes right in without moving the transfer case. ...

that's gonna be cutting it pretty close. length i measured was over 27" and my spicer is just under 25" (engine adapter face to yoke CL). that 2"+ is going to be hard to take out of a 7" long jack shaft. it doesn't sound like much, but... point is i'm not sure it's 'plug-and-play'.

... it is a four speed direct drive but i dont know what the other ratios are...

3.45 1st
2.25 2nd
1.41 3rd
1.00 4th
5.03 Rev

source

i considered one and i know where to get one, but it isn't lockup (i think), so that's a 'NoGo' for me. plus, the torque specs are pretty dang low.

 

[stumps]

because the tag on my trans says 3053.

Yeah but.... I checked all of the TM's that I could find from 1965, where the 3052 was predominant, through 1980, where the 3053A was standard, and I haven't found any reference to a plain 3053. It might not have ever made it out of the factory.

I have seen plenty of occurrences [edit: on other government equipment] where the basic model number is permanently stamped on the tag, and the modification level is an adhesive tape square with a single digit or letter stuck onto the tag after the model number. Perhaps that is what was done with your transmission?

-Chuck

 

[mudguppy]

... It might not have ever made it out of the factory....

there are several threads on this forum that speak to having all 3 models available in the deuce; this being one of them.

 

[booger]

OK here is what I found out. My tranny tag is 3053. I swapped tach's and they both read the same. The 71 Deuce with 9.00 NDT's gives me 46MPH @ 1900 RPM's with both tach's, the tach out of my 65 and the 71 tach. In the 65 which has XZL's I get 60MPH at 1900 RPM's with BOTH tach's. I was told by the previous owner that fifth gear was a .79. Maybe it's even a .75 or .71

 

[m-35tom]

don't kid yourself, all 3053 are the same, forget about the 'A'
all 3053 are .79 od
as to the above mentioned thread, i think there is a great misunderstanding here, more on that later, but it isn't so.

i have the only known set of civilian .71 gears, that i used in my first prototype. they are extremely rare, i searched for over 1 1/2 years to find them. this trans was last used in civi world in 1965.

if you want to check things do the math, it is very accurate.

Basic formula is:rpm = (168 * mph * ratio ) / radius
Where:
"rpm" is engine speed in rpm
"mph" is road speed in mph
"ratio" is product of all ratios,
in your case ratio = 0.79 * 1.0 * 6.72 = 5.309
"radius" is the distance from the ground to the center of the axle shaft.

Or if you want to solve for mph then equation is:
mph = ( rpm * radius) / ( 168 * ratio)

tom

 

[booger]

...kidding myself? about what?

 

[mudguppy]

OK ... I get 60MPH at 1900 RPM's with BOTH tach's. I was told by the previous owner that fifth gear was a .79. Maybe it's even a .75 or .71

ok, so now you've confirmed the rpms w/ a second tach and the mph was confirmed with gps. well, math says this:

OD ratio = [(rpm x tire D) / (mph x axle x 336)] = [(1900 x 52")/(60x6.72x336)] = 0.73.

sooooo....... that means......... that......, um..... ?



**fyi: 0.71=1850rpm, 0.75=1950rpm, 0.79=2050, and 0.85=2200rpm**

don't kid yourself, all 3053 are the same, forget about the 'A'
all 3053 are .79 od
as to the above mentioned thread, i think there is a great misunderstanding here, more on that later, but it isn't so. ...

yeah, i'd really like to hear more... opcorn:

 

[stumps]

ok, so now you've confirmed the rpms w/ a second tach and the mph was confirmed with gps. well, math says this:

OD ratio = [(rpm x tire D) / (mph x axle x 336)] = [(1900 x 52")/(60x6.72x336)] = 0.73.

Or,

tire D = OD ratio x mph x axle x 336/rpm = 0.79 x 60 x 6.72 x 336 / 1900 = 56.33 inches

Not one single deuce TM that I can find talks of MF OD ratios other than 0.79. If your tach works correctly, you tires must be bigger than you think...

Tape measure time: Measure the center of the axle to the ground.

Or there is a common failure in the tachometers that causes them to read low by 8%?

Or a combination of the two: tach reads 5% low, tires are 3% big...

The one explanation I don't readily accept is OD ratio not equal to 0.79. That takes more than a one gear change. It would have to be intentional, not accidental.

The answer is out there...

-Chuck