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  1. #1
    Join Date
    Oct 2014
    Location
    Bucks
    Posts
    47

    Transmission tunnel seat belt mounting point

    Hi All,

    I'm looking at my Sumo chassis and I have the mounting lug on the outside edge for the seatbelt buckle. However I'm struggling for the transmission side mounting point. How have others secured their seat belts to the transmission tunnel? I've looked at the build manual and it refers me to section 3 with photos of the chassis but i cant make it out. You'll have to excuse me if this has been asked before.

    Many thanks in advance


    Russell

  2. #2
    Join Date
    Nov 2012
    Location
    South of Winchester
    Posts
    210
    My mk2 has predrilled holes with doubler plates welded in on the tranny tunnel for the inner seatbelt mounts - went through the IVA with no issue just over 2 years ago. I assume the later cars would be similar?

  3. #3
    Join Date
    Oct 2014
    Location
    Bucks
    Posts
    47
    Hi,

    My chassis doesnt appear to have those holes in the transmission tunnel. It also doesn't have the flutes pressed into the floor pans or additional holes to tweak the rear wheel camber angle for some reason. I brought it when it when Pilgrim was transitioning from Den (the second time round) to the new current owners. I've attached a photo showing the lack of holes from when I first received it from Pilgrim.
    P1010441.JPG
    You don't happen to have any photos of your mounting point so I can see what I need to retro fit?

  4. #4
    Join Date
    Dec 2008
    Location
    Newcastle upon Tyne
    Posts
    1,951
    Russell,

    As far as I am aware Pilgrim only ever had a single mounting hole for the inboard pivot of the rear trailing arm on the Sumo. The three holes, spaced vertically, for the outer pivot were to provide some adjustment for the rear camber (and toe).

    The location of the fixing point for the seat belt, on the transmission tunnel, will vary depending on the fitted position of the seats and should be reinforced using a spreader plate - usually with a 7/16" UNF fixing - on the transmission side.

    Never seen a floor without the flutes before so can't help with that, good luck with the build

    Hope this helps,
    Ian
    Pilgrim Sumo Mk3; IVA Apr. 2014; RV8 3.9 EFi ; Cosworth T5; Granada Donor
    Phase Two underway - Conversion to Japanese

  5. #5
    Join Date
    Nov 2012
    Location
    South of Winchester
    Posts
    210
    Unfortunately my mk2 is/was Cortina based and now converted to Sierra, so my set up won’t help any. Before I converted mine I spoke with Mark at Pilgrim and he sent me some photos of a mk3 chassis they had at their works - might be worth a call to explain where you need a bit of guidance - once you can talk to Mark he’s super helpful.

  6. #6
    Join Date
    Oct 2014
    Location
    Bucks
    Posts
    47
    Hi All,

    Thank you for all your replies about the seat belt mounting point. I've finally got in the garage to have have another look.

    As you say I need to get the seats in and then suss the mounting position out from there. I was looking in the seat belt instructions and some cars (Peugeot 205) have a rail instead of a fixed point, has anyone gone down the route before?

    Its a great idea to ring Pilgrim for advice as they are always putting cars through the IVA test.

    I also had look for the extra holes on the outer side radius arm mounting point but they just don't exist on mine. Possibly a Friday special

  7. #7
    Join Date
    Apr 2016
    Location
    Cambridge
    Posts
    230
    Cant help im afraid as not at that stage yet but my Mk3 chassis is exactly the same as yours; no internal seat belt mounting hole/reinforcement and no flutes running down the floor pan. Will be interested to see your outcome.
    Building a Mk3 Sumo - Rover 3.5

    If you're not meant to eat animals, how come they're made of meat!?

  8. #8
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    9,687
    This is what I did, passed SVA OK.

    http://www.cobraclub.com/gallery/sho...paint2/cat/500

    I think I put a spreader plate on the outboard side, although a fat penny washer would have been fine as the load is transmitted through the box section of the frame.
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.
    My Gallery: http://www.cobraclub.com/gallery/showgallery.php/ppuser/3240/username/kevinw

  9. #9
    Join Date
    Oct 2014
    Location
    Bucks
    Posts
    47
    Hi All,

    Thank you for all your replies. I thought I would post a couple of photos of my solution regarding the inner transmission mount. I used Kevins idea and put the fixing through the box section and then put a harness stress plate on the inside of the transmission tunnel to thread the bolt into.

    20211223_195428.jpg
    20211223_195457.jpg

    Im hoping that the IVA inspector will be happy with this solution, and that it will be useful to another Sumo builder. Fingers crossed

  10. #10
    Join Date
    Feb 2007
    Location
    West Sussex
    Posts
    9,687
    - just make sure you have the right bolt ... 7/16 UNF I think ..... not sure how forcefully this is enforced but best safe than sorry.

    Best of luck with it.
    Crendon Chassis No.49
    Huddart FE428 + toploader

    Not listed in the Shelby Register.
    My Gallery: http://www.cobraclub.com/gallery/showgallery.php/ppuser/3240/username/kevinw

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