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Rear Crossmember Jacking Adapter?

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Old Jan 19, 2010 | 10:32 PM
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Default Rear Crossmember Jacking Adapter?

Does anyone have any good dimensions or photos of a custom adapter they had built to go between their floor jack and the rear crossmember to lift the car by the appropriate jacking points? Guess I need to get one welded up?
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Old Jan 19, 2010 | 11:01 PM
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Try this link. http://forums.corvetteforum.com/c5-g...-1st-time.html

The cross beam adapters are adjustable. I have one set up (fixed width) for the front and another set for the rear. They have a pin on the bottom center that fits right into my 3 ton floor jack. I did a search and every place I found was out of stock. I don't know if that means they have stopped making them or not.
Hope this helps.
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Old Jan 19, 2010 | 11:37 PM
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Originally Posted by Z Blue
Try this link. http://forums.corvetteforum.com/c5-g...-1st-time.html

The cross beam adapters are adjustable. I have one set up (fixed width) for the front and another set for the rear. They have a pin on the bottom center that fits right into my 3 ton floor jack. I did a search and every place I found was out of stock. I don't know if that means they have stopped making them or not.
Hope this helps.
Yeah! That's what I was looking for, but you're right, it looks like they are out of stock?
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Old Jan 19, 2010 | 11:42 PM
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Yes 2x8x18 treated lumber
Works like a charm and is better for the cross member.
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Old Jan 20, 2010 | 03:01 AM
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Originally Posted by fireman591
Yes 2x8x18 treated lumber
Works like a charm and is better for the cross member.
That's what I use too. Keep it simple.
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Old Jan 20, 2010 | 04:58 AM
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Here's what I had made - an 8"x8", 1/4" thick piece of steel plate that I place on the jacking pad. I then lift from the center of the crossmember. Has worked fine for years.
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Old Jan 20, 2010 | 07:00 AM
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Originally Posted by fireman591
Yes 2x8x18 treated lumber
Works like a charm and is better for the cross member.
That is even too much

Just slide the jack under the center of the cross beam and lift it up. It is not going to hurt your car
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Old Jan 20, 2010 | 11:19 AM
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Originally Posted by AU N EGL
That is even too much

Just slide the jack under the center of the cross beam and lift it up. It is not going to hurt your car
why do so may people say this is a bad idea? it looks pretty sturdy, i wouldnt think it would be a problem. i still use a peice of wood just to be safe.
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Old Jan 20, 2010 | 01:56 PM
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Originally Posted by fireman591
Yes 2x8x18 treated lumber
Works like a charm and is better for the cross member.
That's what I use for the front and back; works great!
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Old Jan 20, 2010 | 04:18 PM
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Originally Posted by AU N EGL
That is even too much

Just slide the jack under the center of the cross beam and lift it up. It is not going to hurt your car
Isn't it better to lift supporting the entire cross member instead of at just one pressure point, that being the center? Wouldn't spreading the support across the entire cross member lessen the risk of it cracking? Just seems safer to me doing it this way.
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Old Jan 20, 2010 | 08:57 PM
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Yep a 2X8 and a couple of 2X4's
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Old Jan 20, 2010 | 09:03 PM
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Originally Posted by thisMSGgood4me
Isn't it better to lift supporting the entire cross member instead of at just one pressure point, that being the center? Wouldn't spreading the support across the entire cross member lessen the risk of it cracking? Just seems safer to me doing it this way.
In theory yes, but your not going to crack anything. I've done it a few times when i didn't have my trusty 2x4 around. You won't hurt a thing.

Several guys that go to the track every weekend and are swapping out wheels don't use anything. I've never seen or heard of any probs.
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Old Jan 20, 2010 | 09:48 PM
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Originally Posted by thisMSGgood4me
Isn't it better to lift supporting the entire cross member instead of at just one pressure point, that being the center? Wouldn't spreading the support across the entire cross member lessen the risk of it cracking? Just seems safer to me doing it this way.
Its not going to crack it. Just jack it up then put jack stands underneath each side.


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Old Jan 20, 2010 | 09:51 PM
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Originally Posted by Stevo92z28
I
Several guys that go to the track every weekend and are swapping out wheels don't use anything. I've never seen or heard of any probs.
going from drys to wets - several years ago

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Old Jan 20, 2010 | 09:57 PM
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i've never used anything for mine.. the crossmember is pretty damn structurally sound.. if it offers peace of mind, then toss a board under there.. if not, it won't hurt anything.. my opinion anyways
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Old Jan 20, 2010 | 10:48 PM
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"JACK-BOARD"
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Old Jan 20, 2010 | 11:29 PM
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What about jacking up the front of the car? Do you still need something under the front crossmember to jack it up?
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Old Jan 20, 2010 | 11:33 PM
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Originally Posted by unclecookie
What about jacking up the front of the car? Do you still need something under the front crossmember to jack it up?
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Old Jan 20, 2010 | 11:48 PM
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you can do the same. As long as it looks like the pad will fit on there and not slip off. I have jacked it up without but i like to use a 2x4 if i have one.
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Old Jan 21, 2010 | 07:08 AM
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Originally Posted by unclecookie
What about jacking up the front of the car? Do you still need something under the front crossmember to jack it up?
I drive the front two wheels up onto two 2"x14"x24" pressure treated boards. Then slide the low profile jack under the center of the cross beam, and jack from there. No boards.
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