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Upgrade suspension - towing utility trailer 700

posted by  DPNY on  Mon Nov 17 16:53 CST 2008
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last visit: Thu Sep 18 18:45 CST 2014
[RELATED]

Hi,

I installed a hitch on my 1990 manual transmission 740. Recently towed a utility trailer. Went well.

I will be doing more of this and I would like to upgrade the suspension.

What should I do?

I am thinking of installing heavy duty rear springs and KYB KG5565 gas shock absorbers.

Is this a good idea? Are there better shocks for towing a trailer than these KYB?

What about the front suspension should I do something there also? Shocks?

And what is the lower stress bar? Should I install it?

Thanks,

Dean








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    Upgrade suspension - towing utility trailer 700

    posted by  skloon on  Tue Nov 18 05:50 CST 2008
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    last visit: Mon Jun 27 16:56 CST 2011
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    I have an 89 740 and pull a utility trailer and light tent trailer. I put on the heavy duty rear springs and KYB shocks and it was a bit better but the real difference was I put in air shocks, pump them up to 65 lbs and no longer does the tail wag the dog, or ther rear sag. When I am done I lower the pressure and it still handles well, I have put an IPD sway bar on the rear too but didn't notice any difference at all.








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      Upgrade suspension - towing utility trailer 700

      posted by  DPNY on  Tue Nov 18 05:57 CST 2008
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      last visit: Thu Sep 18 18:45 CST 2014
      [RELATED]

      What air shocks did you put in?








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        Upgrade suspension - towing utility trailer 700

        posted by  skloon on  Thu Nov 20 11:39 CST 2008
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        last visit: Mon Jun 27 16:56 CST 2011
        [RELATED]

        Monroe ma 814 I have live axle not IRS








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          Upgrade suspension - towing utility trailer 700

          posted by  DPNY on  Fri Nov 28 08:48 CST 2008
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          last visit: Thu Sep 18 18:45 CST 2014
          [RELATED]

          I got some of these Monroe. I think the air shock and the heavy duty spring is a good combination.

          Where did you mount the schrader air input valve for the air shocks?

          Did you stick with the one valve for the two shocks or did you mount a valve for each shock?

          Any problems with the tubing and the schrader valve?








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            Upgrade suspension - towing utility trailer 700

            posted by  skloon on  Fri Nov 28 12:23 CST 2008
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            last visit: Mon Jun 27 16:56 CST 2011
            [RELATED]

            I mounted the one valve in the drivers side cargo compartment, beside the antennae, I havent had any trouble but am contemplating mounting the air hoses inside rubber tubing to protect against rocks and moving the valve to under the bumper so I can access it without having to dig through all the cargo that tends to be in there when I need to pump up the shocks.








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    Upgrade suspension - towing utility trailer 700

    posted by  Big Harry on  Tue Nov 18 04:39 CST 2008
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    last visit: Sun Sep 21 11:06 CST 2014
    [RELATED]

    I installed a set of the IPD rears on my 245 for towing. The gas shock extras will make the car ride like a freight wagon with no load in it.

    Regards,
    --
    Will Dallas, www.willdallas.us, www.willdallas.org, www.willdallas.com, www.dallasprecision.com 86 245 DL 222K miles, 93 940 260K miles, 88 765 GLE 152K miles, 88 780 246K miles








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    Upgrade suspension - towing utility trailer 700

    posted by  oldyellr on  Tue Nov 18 03:08 CST 2008
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    last visit: Fri Oct 24 14:28 CST 2014
    [RELATED]

    I don't have specific suggestions, but do have a further question that perhaps someone could answer.

    I plan to put a hitch on my '92 740 wagon and am wondering how to tackle the lights issue. My trailer has a standard GM flat 4-pin connector that works with most domestic cars. I've searched and found that to use it with the Volvo circuit, I need an adapter that costs almost as much as a trailer hitch! Is there any information out there how to kludge this or make my own adapter for just a few dollars?








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      Upgrade suspension - towing utility trailer 700

      posted by  DPNY on  Tue Nov 18 03:46 CST 2008
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      last visit: Thu Sep 18 18:45 CST 2014
      [RELATED]

      I got my hitch from http://www.hitchesforless.com

      And used the Modulite Wiring Kit #118186. It has the flat connector.

      Worked for me with a rented U-Haul trailer.







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