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OK to use hydraulic jack on subframe connectors?

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Old Dec 21, 2001 | 01:18 PM
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From: Rugby, England
Car: 1988 IROC Vert
Engine: 355 ZZ4
Transmission: T5 Manual
OK to use hydraulic jack on subframe connectors?

I have a 2 ton jack and was wondering if I could raise my car using my SSM subframe connectors?

Thanks in advance, I didn't want to jack through the floor or anything!

Cheers
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Old Dec 21, 2001 | 01:41 PM
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better use spots where the sfc's are connected. in between it would bend.


-P

Last edited by pontiac; Dec 21, 2001 at 02:52 PM.
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Old Dec 21, 2001 | 03:23 PM
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How do you mean? Anywhere along the subframe connector on either side?
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Old Dec 21, 2001 | 03:25 PM
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I wouldn't. They're basically only attached on the ends and could be bent by pushing up on them in the middle. They're not designed to transmit force in that way.
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Old Dec 21, 2001 | 03:27 PM
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i always have heard people saying the adding subframe connectors will GIVE you a place to jack since the stock places arent' that good.
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Old Dec 21, 2001 | 03:47 PM
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SSMs are welded along the entire length of the rocker panel with stitch welds and with solid welds at the ends. I've jacked it up by the connectors with no problems. SSMs are like 10 gauge 2x3 rectangular steel tubing. It's tough shi+.
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Old Dec 21, 2001 | 05:22 PM
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why don't you just roll your car onto a couple pieces of 2x4 to get it up high enough so you can jack up the front wheels and put them on a set of rims?

i did that with my '87 (put it up on rims) when i did my motor swap.. much easier
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Old Dec 22, 2001 | 02:43 AM
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From: Rugby, England
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Transmission: T5 Manual
Originally posted by Damon
I wouldn't. They're basically only attached on the ends and could be bent by pushing up on them in the middle. They're not designed to transmit force in that way.
That's what I thought I had heard too! Just need to confirm it...

Otherwise where is the bset point for the front of the car with that jack?
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Old Dec 22, 2001 | 03:02 AM
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From: NC age: 24 occupation: body piercer
Car: 87 Trans Am
Engine: 5 point slow LG4
Transmission: Auto
i use a 2 ton hydraulic jack to lift my trans am and i have found that one of the most convenitent places to jack it up is under the lower A arm...i dont know if this is the best idea, but i havent had any complications from using my jack in this spot. but this is only a suggestion...for all i know, i have been using a less than adequate spot all this time.

peace,
menace
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Old Jan 4, 2002 | 06:05 AM
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From: Rugby, England
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Anyone else?
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Old Jan 4, 2002 | 10:14 AM
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Originally posted by Damon
I wouldn't. They're basically only attached on the ends and could be bent by pushing up on them in the middle.
Yea, if they're not installed correctly! I installed my own SSM SFC's and I stitch welded them from one end to the other to the rocker tab. When installing them, you definitely want as much bonding as possible! Why in the WORLD would you only attach the ends!? Strang stuff some people do...

I have been jacking the car from the balance point (about 2 feet back from the front of the connector). I even place the jack stands under the SFC's. I have been following this practice for YEARS with NO problems. The SSM's are WAY too strong to flex in a detrimental way under the load of jacking. So installing SSM SFC's DOES, in fact, give you another (better) place to jack and support.
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Old Jan 4, 2002 | 10:35 AM
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From: Rugby, England
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Thanks Tom, thats just what I wanted to hear!!

Cool
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