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Thread: Attaching a rear crossmember to 100" chassis

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    Attaching a rear crossmember to 100" chassis

    Are the series 2 and series 3 crossmembers the same?
    I'm thinking of attaching one to my RRC chassis on the hybrid so I can have a Landrover tub rather than a tray.
    Anyone have any ideas how difficult this would be, how to do the task and what to watch out for?

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    Davo is offline ChatterBox Silver Subscriber
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    I've made my own crossmembers by getting a big channel folded up and then fabricating everything to go onto it. This included four long "tabs" that were welded into the channel - or crossmember - and they were used for attaching the crossmember onto the sides of the chassis rails. They were really extension plates that overlapped the chassis. It was easiest to weld them into the inside of the new crossmember, and then the whole thing was slid onto the old chassis rail sides and located and tacked. Then I added whatever else was needed to make a proper crossmember.

    Then the gap at the top and bottom between the old chassis and the new crossmember was filled with a plate of just the right size, and then I overdid it a bit and covered each of them with a longer plate that overlapped the chassis and crossmember! And then there was the towing mount and everything else. Small problem from all this welding: the thing bowed a bit.

    I suspect if you use these long "tabs" for a proper crossmember that will help in locating on the horizontal, and then you can figure out where you want it on the vertical. The biggest problem I had with all of this is actually getting everything in exactly the right place for a body tub to mount correctly.
    At any given point in time, somewhere in the world someone is working on a Land-Rover.

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    alien is offline A Keeper of the TGO Silver Subscriber
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    A bit of reading with some links within for you(I had it saved for a project ute).
    GB Crossmember Converted to Bolt-on
    Cheers, Kyle



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    Quote Originally Posted by Davo View Post
    The biggest problem I had with all of this is actually getting everything in exactly the right place for a body tub to mount correctly.
    That is what I am expecting my biggest problem to be. What was your solution?

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    Quote Originally Posted by alien d2 View Post
    A bit of reading with some links within for you(I had it saved for a project ute).
    GB Crossmember Converted to Bolt-on
    Guess where I'm expecting the rear crossmember to come from.

  6. #6
    Davo is offline ChatterBox Silver Subscriber
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    Quote Originally Posted by Mick_Marsh View Post
    That is what I am expecting my biggest problem to be. What was your solution?
    Guessing and swearing.

    No, for the first one I trial-fitted the body. It's the only sure way. For the second one, I was building an entire chassis in a bit of a hurry, (it's a long, long story), and went by measurement and it wasn't too bad, but let's just say that I needed a couple of shims later on!
    At any given point in time, somewhere in the world someone is working on a Land-Rover.

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    Well I can't help you with the fitting part of it but IIA and III rear crossmembers are a bit different but I don't think it would be a problem. I think the IIA crossmembers are a bit better and don't tend to rust out as quick. This will come in handy for when I fit the crossmember on my 100"

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