PTO Question

[pwrwagonfire]

As you guys know, I have a 1952 M-37 Wo/W. This past summer, I have slowly aquired all of the parts to add a winch to this truck.

I traded a gentleman a couple parts for the PTO, and PTO driveshaft off his 1958 M37B1. My question is: Will this PTO work on MY transmission? And if it dosen not, I assume the drive shaft will still be ok?

I knew it was possible that it would not when I made the trade, but I figuired hey- at least now I have something to trade for one which will works!

Thanks in advance

[Lifer]

If your truck was originally a "without winch" truck and still has the original transmission, you will have to install a PTO, which could mean swapping the transmission completely. You would also have to acquire an engagement lever/linkage, and replace or modify your driveshaft hump panel. (The w/ow hump does not have a slot for the PTO lever to come up through.) You'll need to get frame extensions and a two-piece bumper, too, if you haven't already done so.

Adding a winch is not really difficult. It's just time consuming and eats up tons of money locating and procuring all the parts required to do it. Are you actually going to use the winch often enough to make the effort and expense worthwhile or do you just like the way a winch truck looks?

I'm just pointing out a few of the challenges you may face here. As always, it's your truck and you're allowed to do what you want with it. Most of all, ENJOY!

[pwrwagonfire]

Thanks for the reply!

My truck does in fact have the 6 bolt plate which you remove to install the PTO on the tranny (luckily), and I have aquired: The bumper and frame extensions, the winch, the drive shaft assembly, control lever and linkage, rubber boot to go over the lever, the pto lock, and winch data plate. The winch will need to be restored itself, I haven't dug into that yet though!

At work I regularely use a '64 civilian power wagon (I know not the same, but close ) and we are pretty versed with winching and snatch blocks, etc...so I guess I don't need the winch...but you know how it is

I guess my question is will a power take off for an m-37b1 work on an earlier m-37. I know they made changes in the later years, but Im assuming '58 was closer to the origional!

[Lifer]

Yep! I "know how it is." My wife still refers to my antique Harley as her "new bedroom suite."

Re the PTO question, I'm afraid I don't know the answer to that one. Never fear, though. Someone will know.

[monkeymissile]

I think they changed transmissions between the earlier M's and the B1's, but I'm not 100% on that. Check out the PTO? thread started June 16 by Jeepdud. It may help you identify which PTO unit you need to match your transmission.

[cuz]

The early M37 tranny is a New Process model 88950 and the PTO was a DH-12530.

The M37 later tranny was a New Process model NP 420 and the PTO was DH-12530.

The M37CDN was a Canadian Acme T-98 and the PTO was a Canadian Acme 4867.

[pwrwagonfire]

Excellent!! Thank you everyone for the help and words of advice!

I'll make sure to let you guys know how it turns out...but it'll be quite awhile before I put the thing on

[MSeriesRebuild]

The idler gear on the PTO used on the early transmission is different from the idler gear in the unit used on the 420. The model #'s of the 2 PTO's are not the same simply because the gears are different diameters. The PTO housings are the same, that gear is the only difference.

With that said, to answer your question; yes (in most cases, but not all) you can mount either unit on either transmission even though the gears are different. Installing will either take fewer or more than the normal # of shims to obtain the correct gear backlash of .003" - .008" if the PTO is installed on the trans it is not designed for.

In a few cases I've seen the PTO that has the smaller gear be too loose on backlash when mounted with no shims in place. If this happens, then no it will not work properly. Just be careful and check backlash closely, chances are you can make it happen.

[SOTVEN]

HELLO, WHEN I INSTALLED MY BRADEN TO MY WOW M37, I FIGURED, "HEY, SIX HOLES, SIX STUDS, PLUG AND PLAY. THATS FAIRLY EASY". MADE A THIN GASKET TO GO INBEETWEEN, TORQUED TO PERFECTION AND VOILA!!! THE WINCH WORKED, BUT I COULD NOT PUT MY TRANSMITION TO ANY GEAR. THANK GOD FOR THIS FORUM 10 YEARS AGO, THE PEOPLE HERE ADVISED ME AS FOLLOWS. REMOVE THE FLOOR PANEL OVER THE TRANNY, REMOVE THE TOP COVER OF THE TRANSMISSION. REMOVE THE ILL INSTALLED PTO, AND SHIM IT ACCORDINGLY UNTIL YOU GET THE TOLLERANCE THAT CHARLES AFOREMENTIONED. PUT EVERYTHING BACK TOGETHER, INSTALL LUBE, AND YOU ARE GOOD TO GO. INDEED, IT TOOK 4 SHIMS 2MM EACH AS OPPOSED TO MY ONE 0.5MM TO GET THE CLEARANCE I NEEDED. I HAVE USED AND ABUSED MY WINCH SINCE THEN MANY TIMES AND NO PROBLEMS WITH THE PTO/TRANNY MATING. GOOD LUCK FRIEND.

[pwrwagonfire]

Excellent advice, thank you guys!