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cubehopper

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About cubehopper

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  • Location
    East Yorkshire
  • Cars Owned:
    previously owned
    TR6 SKJ 281G
    TR5 OOF 1G-I know, should have kept it
    Lotus Europa S2-money pit

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  1. cubehopper

    Diff rebuild update

    Hoping to get some engineers Thanks for your advice Hoping to get some engineers blue in the morning so I`ll have another go, hopefully the markings should be a lot clearer. Once I`m happy with the set up how do I test run it before fitting, you mention with a drill, would that be with a socket on the pinion nut. Dave
  2. cubehopper

    Diff rebuild update

    Thought I would again try to get a readable contact pattern on my diff, but not able to get any engineers blue until Monday. Tried a black permanent marker pen and although the film is a bit thin the finish is streak free and consistent , and after applying a load on the crownwheel and turning the pinion 4 times I achieved something more like a recognisable contact pattern. Obviously when I get the blue on Monday the results should be clearer still. All I`ve got to do now is interpret the results and make the appropriate adjustments, easy eh Dave
  3. cubehopper

    Diff rebuild update

    Hi Peter, Yes I replaced the bearing so changed the shim at the same time, both old and new shims measured 40thou.Got it from Rimmers. Crown wheel and pinion are the original ones. Dave
  4. cubehopper

    Diff rebuild update

    Thanks for your reply Dave, I`m going to give it a go with the blue and see if it makes any difference and I`ll try a smaller amount also. Dave
  5. cubehopper

    Diff rebuild update

    Here`s another set of mesh patterns ,mine are very similar to image A. Perfect contact no modification needed Very confusing. Dave
  6. cubehopper

    Diff rebuild update

    Hi Waldi, That's a reasonable assumption, I think checking the meshing pattern again using engineers blue is maybe my next step. Though I`ve just found this set of mesh images on a Singer Le Mans site and the images on the middle row right hand side, seem identical to mine. It says that the bearing is too high, doesn't explain which bearing though or how it is too high,but I imagine that it can only mean the large inner bearing under the pinion head.I did measure the pinion depth before I removed it and when I refitted it with a new identical thickness shim, I noted that it was 15thou lower, but I thought not a problem when I come .to check the mesh pattern I`ll get a reference point and change the measurements accordingly too correct it, but now I`m thinking is the pinion too far from the crownwheel to get a reference pattern. I may loosen the pinion nut a thread and tap the pinion back towards the crownwheel slightly and check the meshing again, If I then get a recognisable pattern then I can maybe increase the shim under the pinion head bearing to correct this,does this sound reasonable. Dave
  7. cubehopper

    Diff rebuild update

    Hi Peter , yes that's the stuff,from the same supplier also. Yes you`re right about the contact area being the same both sides of the teeth, something doesn't seem right does it , just looks as though the pinion has completely wiped the crownwheel teeth clean. I`ve looked at lots of websites showing diff meshing images and cannot find any showing the same thing. If I knew what the problem was then I would be able to tackle it but at the moment don't know where to start. The annoying part is that the diff feels very nice and smooth with no grinding or incorrect meshing. Dave
  8. cubehopper

    Diff rebuild update

    It did seem a tad greasy when I brushed it on the teeth but it was advertised as gear marking paste, I`ll certainly do as you suggest Bruce and try the blue. Dave
  9. cubehopper

    Diff rebuild update

    Hi Bruce , The yellow stuff I used is proper gear marking paste, I thought that it would be easier to see the contact marks than the blue. Are you saying that engineers blue may show the contact pattern differently . Can`t really see that it would. Dave
  10. cubehopper

    Diff rebuild update

    Hi Roger, I have the brown bible and a Haynes manual ,and there is plenty of information on the web and youtube, also Bullfires website gives a good account. Its quite tedious setting the pre loads and backlash though, especially the carrier bearings,must have had the bearings on and off half a dozen times. I cant read what the mesh pattern is telling me now though it doesn't look like anything like the images in the manuals and on the web.I can`t believe that its right first time without having to change the pinion depth at least, I`m not that lucky. I`m hoping that an expert on diffs is going to enlighten me, as at the moment things have come to a standstill Peter I`ll try your suggestion and see if that makes things any clearer. Dave
  11. cubehopper

    Diff rebuild update

    Nobody got any advice / comments regarding this mesh pattern Dave
  12. cubehopper

    Diff rebuild update

    Diff almost back together after fitting new bearings.Pinion preload set at 15lb/inch, carrier bearings preload 3 thou and pinion/crownwheel backlash 3.5/4.5 thou, a tad tight but I`m not whipping them bearings off again for all the tea in china.Pinion depth shim replaced with same thickness one. Not sure about the pinion to crownwheel contact pattern though,doesnt seem anything like what I`ve seen on websites. The pattern on both the drive and coast side is identical.It looks as though its perfect and spot on but it could also be rubbish and miles away. Any comments /suggestions gratefully received.
  13. cubehopper

    Diff problems

    Fortune favours the brave, as the saying goes Bob, diff now stripped apart from the pinion which I might not disturb as the bearings seem ok. Does anyone know where to obtain the sun gear shims which are originally brass/bronze as mine are worn, the ones Rimmers/Moss sell, appear on the websites as though they are made from some sort of fibre/plastic, not sure about the durability of those . Dave
  14. cubehopper

    Diff problems

    Hi Bill, As we all know its a PITA removing /replacing the diff, so its a job I only want to do once and not repeat, I`m getting too old to be spending hours laid on a cold garage floor with a couple of ton of metal above my head, so I may reconsider my options. Dave
  15. cubehopper

    Diff problems

    Hi Bob, I was going to replace shims with new as I went along, but after reading about all the potential problems/pitfalls along with the cost of quality bearings/shims/seals, and then at the end of the day it may be down to a certain amount of luck whether the diff is ok or not, I am beginning to question if its worth the hassle of rebuilding it. Rimmers have recon units in stock at £552 ,don't really know the quality of the bearings fitted though. I need to decide whether its cost effective to have a go myself or just scoot off to Rimmers pay the extra money and possibly save myself a lot of grief. I used to be really indecisive but now I`m not too sure Dave
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