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watson aux in a 1ton

Posted By supercabfreak Saturday, October 29, 2011 6:12 PM
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supercabfreak
 Posted Saturday, October 29, 2011 6:12 PM
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hey guys im new to this forum so bear with me till i settle in

i recently purchased a small watson brownie transmission from a little back woods truck yard in NC, this guy has stuff thats been sitting since the mid 50's and things i didnt know existed...... regaurdless the watson is a 39m1 i was wonderign what yal could tell me about the 39m1 and if anyone had any literature on them

im also interested to know what gear ratios im likely to have and where i could get seals and how to replace them .....i know verry little about this tans and i am eager to install it in my 76 1ton

im installing purely to gain a small mpg increase not to mention twin sticking is cool :D

http://forums.aths.org/InstantForum2010/Uploads/Images/2e47d875-6af1-4ce4-a32c-2ca3.jpg
Friday, November 04, 2011 6:19 AM by Eddy Lucast moderator
dashby
 Posted Saturday, October 29, 2011 6:39 PM
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First--Join ATHS--Best investment for info.

Second--The library in Kansas City has a large book of manuals for the Watson Transmission.  John O'Neal worked for Watson and gave ATHS his master reference manual.

Third--I think some of the folks on here are experienced with these little trannies.  We used to run a few of these in 3014 Whites, but has been too long ago for me to help you.

Dean


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junkmandan
 Posted Sunday, October 30, 2011 5:11 AM
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You really don't want to be known as freak forever............but welcome to the forum !I thought I'd just be able to refer to a chart Dean posted a year or 2 ago,but it only covers the 41,42,43,47 and 48 Watsons ,as well as 3 6000 series Spicers .

But I do have assembly instructions for the 31,39,31M and 39M ..............plus a parts diagram sheet on these same boxes . At first glance ,I thought these boxes might be underdrive only,as "table X" lists underdrive ratios as 1.48 to 1 on the 31M or 31M1  and 1.92 to 1 on the 39M or 39M1 . However ,"table Y" lists overdrive gear # 22-8-95 on the31M and 39M ,and 22-8-96 OD gear on the 31M1 and 39M1 .    Table X shows 21 teeth on the countershaft gear "A" ,27 teeth on the mainshaft gear "B" on the 31M and 39M ,but I see no reference to the overdrive ratios . It also shows 30 teeth on the mainshaft [input],18 teeth on the the countershaft on the 39M and 39M1.
So it becomes blurry here ............perhaps some of the math majors can figure out the OD ratios. 
Does this mean the 31 series OD ratio is .777  and the 39 series is .6 ?    Help !

You can get seals at any industrial bearing supply house . Various ways to change a seal but common is drill a hole,insert a sheet metal screw ,use a slide hammer or pry bar that fits and pop it out . Don't fix what ain't broke ! By the way Watson recommended the use of SAE 50 engine oil in summer,SAE 30 engine oil for temperature between zero and freezing .

By the way,I have a Spicer 5831 behind a Spicer 3152 5 speed main with short 4th. in my GMC pickup . It will dazzle you when I use 4 low,5 low,4 high and 5 high keeping within 300 RPM in the top 4 gears with my 4 banger .
Sunday, October 30, 2011 6:03 AM by junkmandan
wayne graham
 Posted Sunday, October 30, 2011 5:11 AM
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I like the idea, have often contemplated making a toy like that myself. Knew a guy in California in the seventies did it to a F250 to pull 5th wheel camper. worke real nice as he was retired trucker and knew how to use it. if you think two sticks are cool then you definitely will fit in around here. Like Dean said join us cause it will be the best 42.00 you ever spent and then you can keep us posted on your project. Wayne
supercabfreak
 Posted Sunday, October 30, 2011 7:16 AM
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junkmandan do you have a electronic copy of your charts and assembaly diagrams?
Tony Bullard
 Posted Sunday, October 30, 2011 7:45 AM
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Dan, Quote "Table X shows 21 teeth on the countershaft gear "A" ,27 teeth on the mainshaft gear "B" on the 31M and ". There should be at least one more gear on the counter shaft (Cluster gear) and one at least on the output shaft.  If it's a under, direct and over box it should have at least two gears on the output shaft and maybe three on the counter shaft. Does it list those gear teeth counts?

Edit: With two shift forks it looks like a three speed. With only one fork you could have direct and either under or over.


Tony Bullard, Chelsea Vermont
''''''''34 Ford BB restored,
''''''''62 Autocar DC870H restored
Sunday, October 30, 2011 8:47 AM by Tony Bullard
dashby
 Posted Sunday, October 30, 2011 11:44 AM
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This is Junkman doing his stuff at the Hutchinson Show.http://forums.aths.org/InstantForum2010/Uploads/Images/bd607c2e-0bd8-4ab8-aa6c-d192.jpg

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TEWHITEIV
 Posted Sunday, October 30, 2011 3:03 PM
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Supercabfreak, you're gonna love driving that when you get through.  Dad had one he ran in all of his 1-tons, deep under, direct, and over.  Kept his speedometer cable on the main trans.  At 60 mph shift from direct to over and the speedometer would drop to 45 mph.  Ran it behind standards and automatics.  Shifting behind an automatic required a little more skill, but was easier if the automatic was locked in a lower gear and the engine rpm's were higher.

Dad put a Gear Vendor direct-over behind a 6 speed in his F-550 pickup, electric power shift, but wasn't near the fun the brownie was behind a 4 speed.


All I need is one more good deal and I'll be out of business.:unsure:

I'll stick with the old and they can stick the new.:blink:

junkmandan
 Posted Sunday, October 30, 2011 4:24 PM
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Supercab-----I'm not smart enough to transmit the 2 pages electronically .............but send me a PM with your real name and address and I'll put it in the mail. 

Tony---I first thought it might be just an underdrive unit but saw the 2 shift rails ,so I knew it was a 3 speed box . And yes there are 3 gears  on both the main and the countershaft .Looking at it closer than I did earlier ,I see the input gear on the mainshaft is 20 teeth,the one in constant mesh below it is  23 teeth .
Bruce Ohnstad
 Posted Sunday, October 30, 2011 5:32 PM
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I'd love one in my F 350, but there's not much clearance after putting it in, and driveline angles can be tricky. 

If you mark each yoke and the case at top dead center, then look at the output shaft like a clock with twelve "pie pieces."  Spin exactly one turn on the input, write down how much the output turns.  You'll be able to figure out your ratios very close.  For example, in overdrive, if the output turns to "11 o'clock" that makes 11/12= .92 overdrive.  "10 o'clock" means 10/12= .83 overdrive.

If that has a fast overdrive, it might lug the engine under a heavy load instead of splitting a shift.  But good luck, I'd really be tempted if I had one.

Bruce


1932 White 643 restored in the working museum

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