6 bolt drive shaft

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Model T Ford Forum: Forum 2014: 6 bolt drive shaft
Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Benedict on Thursday, November 20, 2014 - 07:23 pm:

My friend has 5 model T's 1926. We noticed yesterday that the rear end we were working on had 6 studs with nuts to connect the drive shaft to the rear end pumpkin. All his other {4} T's use 6 bolts. This is an early 26. When did they go to Bolts


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Walker, NW AR on Thursday, November 20, 2014 - 07:45 pm:

The MTFCI Judging Guidelines book says that change was made in mid-1919.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Georgetown TX on Thursday, November 20, 2014 - 07:46 pm:

The bolts were introduced about 1920 with the so called "open" shaft pinion spool. The studs work just fine. Be sure to use safety wire on either studs or bolts.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Benedict on Thursday, November 20, 2014 - 07:50 pm:

will the studs be considered Period correct for a 26? I have a couple sets of original bolts.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Georgetown TX on Thursday, November 20, 2014 - 07:54 pm:

No, the studs were never used by Ford after 1919 model year.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Roger Karlsson, southern Sweden on Friday, November 21, 2014 - 04:32 am:

I think it's odd Ford never drilled the 1920-27 bolts for safety wire. Were the studs drilled?
I think most have used the bolts without wiring them over the years - has anybody here seen bolts that have loosened up in service if they were properly tightened when assembled?
Ok, lock washers should probably be used - were Ford using them?

Another variance is the bolt head dimension - I think earlier bolts were 5/8 and hard to reach with many tools, the later ones 9/16 and easier to reach. Don't know when it was changed, any observations?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Benedict on Friday, November 21, 2014 - 07:59 am:

the studs are not drilled for wire and neither are the (2) sets of original bolts I have. There are no washers under the heads of the nuts presently. Since I am after a period correct car, I believe drilling the heads of the bolts for wire might be a reason for this forum to read me the riot act. Some of you guys and girls can be ruthless. LOL I will point out that one of the nuts on top looks like it has backed off about 1/16. Bob


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Benedict on Friday, November 21, 2014 - 08:08 am:

the studs are not drilled for wire and neither are the (2) sets of original bolts I have. There are no washers under the heads of the nuts presently. Since I am after a period correct car, I believe drilling the heads of the bolts for wire might be a reason for this forum to read me the riot act. Some of you guys and girls can be ruthless. LOL I will point out that one of the nuts on top looks like it has backed off about 1/16. Bob


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Treace, North FL on Friday, November 21, 2014 - 08:55 am:

Roger

Yes on lock washers, when Ford changed from studs with safety wire on the castle nuts, to hex bolts, those hex bolts got lock washers {Para.621(b) Ford Service}

With so many bolts, was safe enough with each having lock washers.



Copper tag on axle housing is noted 'BW' and year. Bronze Washer.....note for later owner!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Treace, North FL on Friday, November 21, 2014 - 09:02 am:

1920 and earlier. Studs have holes in only one end. Castle nuts, wired.



On assembly, really prefer the later design with bolts, sure is much easier to align the torque tube without those studs sticking out, trying to get the tube on the housing and keeping those paper gaskets needed for adj. from tearing at the holes for those dang studs!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf, Parkerfield KS on Friday, November 21, 2014 - 09:30 am:

So why did Ford use studs without holes? And without holes, why did they use castle nuts without lock washers?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mike Walker, NW AR on Friday, November 21, 2014 - 09:47 am:

Steve -- The studs had holes in them for castle nuts and wire. The ones Bob encountered must have been from something else originally.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Larry Smith on Friday, November 21, 2014 - 10:50 am:

The bolts use a lock washer, and you must find a metric one that will fit. The original bolts had a 5/8 hex, but they changed that to 9/16 in 1925 to make it easier to use a socket wrench on.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf, Parkerfield KS on Friday, November 21, 2014 - 11:16 am:

I could have looked at some studs myself, if I'd known where I put them.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Benedict on Saturday, November 22, 2014 - 02:54 pm:

Larry, Why a metric lock washer????


Top of pagePrevious messageNext messageBottom of page Link to this message  By john kuehn on Saturday, November 22, 2014 - 03:00 pm:

Aren't the threads for those bolts a not so common type?

I bought some from a guy who had a bunch at Chickasha on the last day as I was leaving. Seems like I gave 3.00 for those and some other T bolts.

They were all in good greasy shape.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Trent Boggess on Saturday, November 22, 2014 - 03:30 pm:

Originally, Ford used 3/8 inch diameter studs to attach the driveshaft housing to the rear axle housing. In 1910 they found that 3/8 was too small, and that 7/16 was too large. So they split the difference and changed to 13/32 inch studs, and after 1920 bolts. On a 13/32 bolt, a 3/8 inch diameter lock washer is too small, and a 7/16 diameter lock washer is to big. What Larry Smith is saying is that you can find a metric lock washer that is close to 13/32 in diameter, and that you should use these under the bolt heads.

Respectfully submitted,

Trent Boggess


Top of pagePrevious messageNext messageBottom of page Link to this message  By Richard Gould on Saturday, November 22, 2014 - 04:07 pm:

First I heard Ford used lock washers under the bolt heads. I've seen a lot of rear ends but never lock washers.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Richard Gould on Saturday, November 22, 2014 - 04:11 pm:

Just read Dan's reference. I stand corrected.


Top of pagePrevious messageNext messageBottom of page Link to this message  By JD, Wichita, KS on Saturday, November 22, 2014 - 04:55 pm:

10 mm lock washers work good on these bolts.


Top of pagePrevious messageNext messageBottom of page Link to this message  By john kuehn on Saturday, November 22, 2014 - 06:18 pm:

I thought the bolts were a little different (13/32). Not real common.

Snyders gets 4.35 each for the USA bolts. They call them step bolts.


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