remanufactured Differential Gears

allanallan Posts: 212Member
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
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Comments

  • Jon BJon B Posts: 7,241Administrator
    Wasn't Ivan Zaremba selling those?
  • bob wardbob ward Posts: 1,259Senior Contributor
    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.

  • allanallan Posts: 212Member
    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 wardbob ward Posts: 1,259Senior Contributor
    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. 
  • allanallan Posts: 212Member
    Good idea, but I would still need a set to copy.
    Allan
  • bob wardbob ward Posts: 1,259Senior Contributor
    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. 
  • Old Fogey UKOld Fogey UK Posts: 635Expert Adviser
     dbob ward said:
    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.

    I'm afraid Pat died recently.
    The gear sets may be still be available through the ROC.
    They can be contacted via their website.

  • Jon BJon B Posts: 7,241Administrator
    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.
  • Old Fogey UKOld Fogey UK Posts: 635Expert Adviser
    Jon B said:
    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,
    There was a really nice one in the ROC magazine a couple of issues ago. I am surprised they didn't pass it on to the HET.
    If you contact them via their website I'm sure they'll forward it.
    Yes, the Northern Irish dentist was a nice man - RIP.
  • Jon BJon B Posts: 7,241Administrator
    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.
  • Old Fogey UKOld Fogey UK Posts: 635Expert Adviser
    Jon B said:
    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.
    If I can get the relevant ROC Bulletin back from my friend, I'll scan it and email it to you.
  • Old Fogey UKOld Fogey UK Posts: 635Expert Adviser
    Jon B said:
    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.
    If I can get the relevant ROC Bulletin back from my friend, I'll scan it and email it to you.
    Jon - I've just sent you a private message about a link to the online version of the ROC Bulletin that carried Pat's obituary.
  • RocketRocket Posts: 427Senior Contributor
    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 wardbob ward Posts: 1,259Senior Contributor
    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.

  • allanallan Posts: 212Member
    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.
  • allanallan Posts: 212Member
    Still interested in a set that's available now if anyone knows of one!
  • 35 Terraplane35 Terraplane Posts: 312Senior Contributor
    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.
  • GeoffGeoff Posts: 4,160Senior Contributor
    The 8-bolt unit will fit straight in your housing, but you cannot  fit a 8-bolt crown wheel to your existing carrier.
  • bob wardbob ward Posts: 1,259Senior Contributor
    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 Terraplane35 Terraplane Posts: 312Senior Contributor
    Thanks Geoff & Bob. That’s what I needed to know
  • hasktavern1hasktavern1 Posts: 54Member
    Rocket, I would be interested in one.  Keep me posted as to progress/potential cost.  My car is a 36T.
  • 35 Terraplane35 Terraplane Posts: 312Senior Contributor
    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
  • RocketRocket Posts: 427Senior Contributor
    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.
  • hasktavern1hasktavern1 Posts: 54Member
    Wonderful!  Thank you sir.
  • bob wardbob ward Posts: 1,259Senior Contributor
    From memory the Colorado Springs CWP were approx US$1200 a set.
  • 35 Terraplane35 Terraplane Posts: 312Senior Contributor
    Sounds good, Thanks 
  • ken1962ken1962 Posts: 300Member
    I'm interested as I'd like my 36t move along abit faster cheers ken
  • RocketRocket Posts: 427Senior Contributor
    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.
  • hasktavern1hasktavern1 Posts: 54Member
    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?)
  • RocketRocket Posts: 427Senior Contributor
    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.
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