MYSTERY GEAR??? mainshaft 3rd 23 T?

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1951 adam
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MYSTERY GEAR??? mainshaft 3rd 23 T?

#1

Post by 1951 adam »

I posted about a strange click when I rotate my transmission sprocket, I pulled the tranny, opened the lid...and try looked for the source... What measures out , according to palmers, as the 3rd counter shaft early( pre 58) has 23 teeth!! not 24, and is running with it seems..( going by the 4 tooth speedo drive ) 62 to 68 cluster, whats even stranger is the mainshaft low and 2nd seems to be the 74 -79 fx 17 and 20 tooth , which matches the counter low gears...so this things a frankenstein !!! any idea where the 23 tooth gear comes from? cant find it in any of my books, Adam.. I'll try and post a photo
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#2

Post by 1951 adam »

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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#3

Post by RUBONE »

Looks like you have a mainshaft second gear for a 3&R in there!
Time to tear it down!
Robbie
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#4

Post by 1951 adam »

RUBONE wrote:Looks like you have a mainshaft second gear for a 3&R in there!
Time to tear it down!
Robbie
Robbie did they come in a 23 tooth? Palmers says it came in a 22, I marked and counted this gear more then once, and it has 23 teeth...any Ideas, thanks in advance, Adam
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#5

Post by 1950Panhead »

No mystery, 77 to 84 FL used 23 tooth mainshaft gear.
You can use newer gears in a panhead tranny.
Jerry
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#6

Post by 1951 adam »

Jerry, I cant find a part number for It, Palmers gives a part number of 35306-59 and says its used in 1959- 1984 and is the wider bushing - less gear, this is a small diameter gear, so all I can find is an early or late gear, but both are 24 tooth..... feeling a bit lost here...., the motor company is known to change parts year to year and then back again, is this just an odd ball gear? Adam :roll:
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#7

Post by RUBONE »

No mystery, 77 to 84 FL used 23 tooth mainshaft gear.
Not So, all 4 speeds use the 24 tooth -59 gear until the end. There are aftermarket 23 tooth gears for "close ratio" gearsets, however none come with a pre '59 bushing arrangement.

Adam, do you know for sure if your low gear set is the FX type? If so your third gear cannot be pre '58 as it won't work with that cluster. It could be an Andrews or such close ratio gear if it has a long shoulder and no bushing to fit the FX cluster. Therefore the mating gear on the Countershaft is the wrong one to mate with it! How many teeth on the CS third gear?
Robbie
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#8

Post by 1951 adam »

Robbie its the standard 17/ 15 counter. Ive read through Palmers, as well as all my parts books.. I'm calling it an early 3rd gear because of the dimensions, under 1 inch wide, palmers gives a dimension of over 1 inch for the 59 and up, I believe he says you can run the early gear with the later 2nd but not the other way around. I counted the teeth on the low gears, and they match up with what is discribed as the 74 up fx set, I have run this tranny for 10 years with no issues...so its unreal that it functioned without incident. Palmer says the type 4 low gears { 74 up fx} should NOT be used....I'm screwed, now I have to come up with all new gear sets it looks like... any Ideas were to find them? Thank you very much for the input Robbie your always right on the money, Adam
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#9

Post by 1950Panhead »

Andrews sells two 18/23 3rd gear sets, early with loose rollers, late (77+) with caged rollers.
http://www.andrewsproducts.com/PDF_file ... atalog.pdf" onclick="window.open(this.href);return false;
Page 30.

There have been threads about using newer gears and gear sets in panhead tranny.
I don't know the rules but it has been done.
Jerry
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#10

Post by 1951 adam »

Jerry thats got to be it! an Andrews close ratio is 23, but they never changed the counter! I'll find out on tear down, post some pics, Thanks, Adam
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#11

Post by 1951 adam »

Can someone tell me what years that speedo drive ring is for in photo, I have a stock speedo { 1951} and I'm a little confused with the discription in Palmers, Thanks in advance, Adam
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#12

Post by Bosheff »

With the exception of trannies from 80-86 (FX's), all gears across from each other, (MS1 & CS1, MS3 & CS3, etc), the tooth count of the 2 gears will equal 41. This applies to all Big Twin 4 speed trannies, and does not include 3 or 3&R mixers. An interesting note is that 80-86 FX series mixers use a 25 tooth MS2 across from a 24 tooth CS2. This equals 49 teeth. To take it one step further on the 80-86 FX series 4 speeds, you have a CS1 with 24 teeth next to a CS2 that also has 24 teeth....bosheff
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#13

Post by 1950Panhead »

48-61 speedo drive=7t, driven = 11t 2000 rev/mile
62-65 speedo drive=4t, driven = 13t 1000 rev/mile

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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#14

Post by awander »

....or thereabouts.....The ratio BETWEEN those 2 ratios is actually 2.068...or about 3.4% off from a 2:1
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Re: MYSTERY GEAR??? mainshaft 3rd 23 T?

#15

Post by 1951 adam »

As far as the drive gears, The drive unit has 11 teeth , and the countershaft gear has 4....no good! so Ill need to change the cs drive ring...Is that correct?
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