Danger sticker on tach

[CGarbee]

One thing to bring up about the OD ratios, I believe the OD on the 3053A is 0.85, not 0.71. interestingly, there is a 3053B which is 0.75 but was not used in the M35.

I found this where cgarbee had posted it, and he said the 3053B, which he found evidence of in some old spicer documentation, is found only in some mid-50's school buses and the like, so it is rather rare. Here:
http://www.garbee.net/~cabell/transmission.htm

In taking a look at the table on my website, I notice that I've got a typo in there concerning the 3053... Bassically, the 3053 came with a 6.00:1 First and a 1.00:1 Fifth, the 3053A came with a 6.00:1 First and a 0.85:1 Fifth, the 3053B came with a 4.50:1 First and a 0.75:1 Fifth (and seems to have been used in International and GMC schoolbus chasis...).
I've got a listing for a 3052 as well that I need to add (among other addtions and corrections). The 3052 has the same case with a 7.16:1 First and a 1.00:1 Fifth. I need to pull out my old GM Spicer service manual...

 

[jwaller]

so there is a differance in the 3053 and the 3053A. I thought I heard back some time ago that they were the same. I see they are not.

back a few weeks ago I had to change trannies and I swapped from a 3053 to a 3053A. I havent really gotten to drive it since I put the new one in but I will be looking for the differences in the first 3 gears. seems like the A should be a better trans with less gaps between the first 3 gears.

My original 3053 had 5th gear die. I wonder if I can find a 3053B 5th gear to install in there when I rebuild it.

 

[m-35tom]

if you put the gears for 5th from a 3153B (civvy) in a 3053A (mil) you will have a .66 od and speed of 60 mph at 2128 rpm. of course those gears have been obsolete for over 20 years now so good luck finging a 1955 school bus to steal them from.................... oh also, your truck will be really scared of hills

 

[Westech]

Westech wrote:
If that motor was set to a max of 2300 why can i cruse at 2800 all day?

It wasn't set to 2300 rpm. Assuming you have a LD/LDT engine, it was originally set to 2600 rpm. If you are running at an indicated 2800 rpm, one of the following is likely true:
a. Your tach is off
b. You have a LDS injection pump
c. Someone messed with the governor setting on your IP before you got it
d. You have a LDS engine

I do have a LDS pump on there. I forgot about that it has been a few years. But that said the Multi was in many White farm tractors and I "hear" that they were set for over 3k RPM.

 

[Polverone]

Are these Danger stickers peculiar only to the Deuce or are they on the 5 & 10 ton truck tachs as well?

HEMTT? or the HUMMER? M1008 and M1009?

 

[Armada]

They are on the 5 ton. There is no tach on CUCV's.

 

[cranetruck]

This 5-ton has it......

 

[dmuchow]

i ran my deuce today, wouldnt go a bit above 2400rpm on the tach, but while driving it home for the first time my g/f said i was pushing 60mph. i never saw the speedo hit anything above 52mph

 

[cranetruck]

The M35A3 at Jim Henry's doesn't have one...this HEMTT doesn't either (appears to be the same tach on both of these vehicles...well almost anyway).

 

[Jake0147]

Perhaps I could tape a small magnet to the transmission rear driveshaft, put the truck in 4th at 2400RPM, disengage the transfer, and use a probe and a counter to totalize the revolutions over 10 seconds. The problem is the low RPM. My counters have no better than a 10 Hz resolution and one impulse per revolution is 40Hz. There might be another way to do it - use headphones - listen to the pulsations (hum) of the magnet as it spins, and run the engine at 1800RPM. one headphone channel goes to the magnetic pickup, the other listens to household 60Hz 'hum' when the shaft is at exactly 1800RPM, the beat will be zero. Close enough for government work anyway.

Maybe I don't understand? Would it not be simpler to just increase your resolution by adding additional magnets? Two or four would not yield a satisfactory resolution? Ten might be a lot, but the math would be easy. I know that using multiple reflective tape segments works well for using my photo tach at lower speeds than it "likes" to read.

 

[cranetruck]

For really low rpms, the best way is to measure the period (time) between pulses to any accuracy and then do the math to find rpm.

 

[saddamsnightmare]

MArch 23rd, 2008.

Gentlemen:

My 1971 Kaiser Jeep M35A2 Wo/W "Saddam's Nightmare", NSN 2320-00-077-1616;
Ident. No. 04J 43671 0525 22392, Contract No. DAAE 06 70 C 0001, with a normally aspriated multifuel, redlines at 2600 according to the "Danger" sticker. I do not know who made the engine in her, as the front builders tag has all the paint worn off it (this seems endemic to all the equipment under the hood), but what should be her redline? And would there be any benefit to uprating the present engine with a "D" or "C" turbo to clean the stack, as she doesn't have the oil cooled pistons and other modifications found on a normally C or D turbo engine?
The present engine has about 22850 miles since rebuild in 1990/1 (narrowed down due to MFR date on old 3 lever removed this week and replaced with serviceable TACOM switch-BIG IMPROVEMENT!!) and her useage in Desert Storm (lots of sand in battery box bottom and 686A tan paint, not usual paint for Illinois NG I would guess),
so if I do a change out, I would try to bring her up to the ESP M44A2 series configuration as closely as possible.
I'll probably end up digging into the TM's, as she seemed to be one of those M35A2's not blessed at birth with a turbocharger. on Freight Train's comment about gear ratios and tire sizes, the M35's are pretty much set in concrete slow cargo trucks.

Thanks again, Have a Safe and Happy Easter Sunday,

Sincerely,

Kyle F. McGrogan

1971 Kaiser Jeep M35A2 Wo/W "Saddam's Nightmare" Desert Storm and Vietnam Veteran Deuce
""??"" Johnson MFG Co. M105A2 1-1/2 ton trailer, cargo, MERDC or NATO 4 color woodland scheme
1963 Swiss Army Cargo Unimog, S404.114 Mercedes Benz, NATO Green

 

[SasquatchSanta]

OPCOM WROTE:

I show that to be:

49.5MPH with 9.00x20's which are 42.0" tall / 131.943" circumference
51.3MPH with 11.00x20's which are 43.5" tall / 136.655" circumference
57.6MPH with 395/85R20s' which are 46.8" tall / 147.022" circumference

- but could be a off due to error with circumference..
It's reasonable anyway. Does that sound right? Someone please correct me if these are wrong, so we'll all be on the same page..

I've never ran the numbers on 9.00s and 11.00s because I never knew the diameters. Judging from what you came up with for the 395s I'd
say you are close to right-on. My numbers for 395s which I show as 46.7" tall indicate just under 58 MPH @ 2,300 RPM.


m-35tom wrote:

correct MAX rpm is 2300

IMHO --- Because of possible crank case venilation (rod failure) and fuel efficiency curves (economy) I think it's both prudent and wise to stay below 2400 but I've never heard the 2,300 RPM number you mentioned.

 

[cranetruck]

I have to say that OPCOM's numbers for the NDCC tires are high by about 5%, the rolling or loaded radius must be used.
Max rpm for the deuce multifuel engine is 2,600 if you go by the TM and that's where you'll find the "Danger" sticker planted. I know that Tom is conservative here, but in my experience 2,500 to 2,600 has not been a problem on long runs.