remanufactured Differential Gears

allan

I am looking for one of the 3:59 gear sets that have been reproduced over the years by various individuals.  Please contact me if you have one these you do not plan to use.

Allan

Jon B

Wasn't Ivan Zaremba selling those?

bob ward

Ivan Zaremba organised a small batch (15 to 20 sets?) of 6 bolt CWP that were pre-ordered and became available at the time of the Colorado Springs 2015 National.
Prior to that Pat McDonald of the ROC in the UK had the same diff gears made.

allan

BUMP:  this lead was followed to a dead end.  I'm looking for a set of gears from previous batches that may not have been installed.  If you know of someone who bought a set and have not used them, please send me the contact info to follow up on.

There have been sets reproduced in both 6 bolt and 8 bolt versions!

Thanks,
Allan

bob ward

One thought is that there have been rapid advances in CNC technology in the last few years, getting a single set made may no longer be cost prohibitive. 

allan

Good idea, but I would still need a set to copy.
Allan

bob ward

The CNC guys could work from a 4.11 CWP, that would give them enough info from which to develop the computer model for a  3.59 set. 

Jon B

Very sorry to hear that.  He was a good man, and very helpful to his fellow club members by having these gears reproduced.  He had been over to the States on several occasions, to attend H-E-T meets, and I was happy to have met him.

Jon B

They may have passed it on, and possibly Sam Jackson already has the obit.  Because this is the first I'd heard about Pat's passing, I thought I'd see if there was an obit, then pass it along to Sam on the chance he didn't have it yet.  A search on the internet proved fruitless.

Rocket

I would like to know if there is still intrest in these gears I was going to have some made if there is I do know of a set I can get for the pattern and I also have a shop that can make them I will check into the cost if there is enough intrest.

bob ward

Tom if you are going to get these 3.55 gears made I would suggest making them for the 8 bolt centre rather than the early 6 bolt centre. The 8 bolt pumpkins are readily swapable into the early diffs.
The 6 bolt centres had/have a reputation for shearing their carrier bolts, the 8 bolt centre is much stronger in that regard.
Secondly you have a much bigger market, the 8 bolt centre was used until 1947. I'm sure its not just the 34/5/6 owners who want more relaxed highway cruising.

allan

Bob is right, I would rather have the 8 bolt set but could also work with a 6 bolt set up.  I think more people would go for this conversion if they realized how much nicer the car drives over all.

allan

Still interested in a set that's available now if anyone knows of one!

35 Terraplane

Question?? Is the only difference the number of holes in the bolt pattern all other dimensions being the same.  Except of course the gear geometry.

Geoff

The 8-bolt unit will fit straight in your housing, but you cannot  fit a 8-bolt crown wheel to your existing carrier.

bob ward

The possibility of making a dual use 6/8 bolt 3.55 CWP has been examined and won't work. As has been said the 6 and 8 bolt pumpkins are interchangeable as a whole but component swaps within the pumpkin aren't possible.

35 Terraplane

Thanks Geoff & Bob. That’s what I needed to know

hasktavern1

Rocket, I would be interested in one.  Keep me posted as to progress/potential cost.  My car is a 36T.

35 Terraplane

Rocket, I would be interested if you're planning on making the older 6 bolt gear. Like my user name it would be for my 35 T

Rocket

AS soon as I can get some information on the cost I will post it these will be the same ones that Ivan had made.

hasktavern1

Wonderful!  Thank you sir.

bob ward

From memory the Colorado Springs CWP were approx US$1200 a set.

35 Terraplane

Sounds good, Thanks 

ken1962

I'm interested as I'd like my 36t move along abit faster cheers ken

Rocket

Just to keep you updated I will know very soon if we can get these made and how much it will cost Now as my good friend says to me alot  changing gears here for a minute here what would we need to know and do to also make these 3.55 for a 8 bolt crown wheel as long as we are making 6 bolt crown wheels is there any intrest I am willing to look into it just let me know what think Tom.

hasktavern1

Tom, I would like to think that the more interested parties, the less cost to each.  Although that may/may not be the case.  Also, we all need to make sure we have money to put where our mouth is...you should in no way be expected to front the costs!  We may need to move on to private messages/phone calls to provide mutual assurances.  Thanks again, Jared C   (note> I dont see this info on the regular club forum,,,,,do you want me to put the info on there under 'Parts", to make sure we dont miss anyone?)

Rocket

Jared C I am sorry I never thought of puting it on the regular forum would you please put it on for me Also I got great news today I called my gear company today and they put me in touch with a company not far from I live and they are going to work out the cost for me on the 6 hole sets and they said they should be able to do 8 hole sets for us to all I need now is some one I can call in the club who can tell me what years 8 hole sets were in and how to figure out the 3.55 for the set also I need to know if any one wants 8 hole sets thanks Tom.

hasktavern1

Tom, I just posted the info on the regular Forum.

Rocket

Thank you.

Jon B

When you finally get your pricing worked out, why not do a "full court press" of publicity, announcing the repro project and soliciting interest from owners of pre-StepDown Hudsons?  Announcements could be placed in the WTN, on the Facebook page, on both H.E.T. internet forums, and could be sent to chapter newsletter editors and even our affiliated Hudson clubs (Sweden, England, Australia and New Zealand).  This could be a rare opportunity to purchase gears that will allow Hudsons of the 1930s to cruise at 60 mph, at a very reasonable price.  In the past, there were sporadic announcements of gearset availability, but the gears were only turned out in production runs of 10 at a time (possibly because many people were unaware they were even being made).  If you turned out 50 or 100 at a time, instead, the price might drop wonderfully -- which in turn might convince even more people to order them.  In order to guarantee that buyers followed through on their intention, maybe a trusted H-E-T person or group could collect down payments from would-be buyers and hold them in escrow until the gears were ready.  To sum up: I think the secret of success for such a project lies in spreading the word, well in advance, throughout Hudsonland.

bob ward

I've been through the process of fitting (it was done by a pro I just paid the bills) a set of Ivan's 3.55 CWP to a 6 bolt pumpkin. With the benefit of hindsight and if the CWP had also been available in 8 bolt I would have gone with the 8 bolt. 8 bolt centres were installed from late 37 to end of 47 and are swappable with the 6 bolt centres.

Reason for that is that I dismantled 4 or 5  6 bolt centres and all the carriers had damage from having parted company with the crown wheel at some stage, the mating surfaces were scuffed and torn, not what you want to see when you are going to install expensive new gears. 

With an 8 bolt centre the odds of getting a good carrier are much higher. YMMV.

The 6 bolt diff bearings were expensive, I don't know if the 8 bolt diff bearings are different or cheaper but its something to check out.