06BIGRIG

     Ditto, Orcas tow.  I have one on my 02 F550 4x4 6spd manual tied into the rear brakes also.  The factory parking brake is a joke and you will brake several foot levers trying to get it to hold (ask me how I know LOL).  It holds exellently.  There is a wire on the mico that you can plumb into your horn button which will sound the horn in the event it is loosing pressure.  Thanks, Steve.

    Anyone out there have a 36"  light bar pylon they would like to move - I can use one.  If it's steel (rough & scratched - ok - I can fix).  Thanks, Steve   319-465-3387

     My CONGRATS! to the ISP for taking the time to do this - we need to get people talking about it and the best way is to get into their pocketbook!!  Thanks again ISP!!  Steve.

     Correct me if I'm wrong, but I believe GVW ratings are relative to a load being placed over or in front of  the rear axle.  When you extend your underlift, you are transferring weight OFF your front axle depending on how much extension you have.  With that being said, I have owned quite a few WL trucks over the years and I prefer 161" WB on LD and ALWAYS beef up the rear springs.  On one 1-ton I built, I added 3 leaves to the main and 3 leaves to the overload - I think I had a total of 14 leaves on each side.  I could tow box trucks from the front with no problem with plenty of steer axle weight - the W/L of course was mostly sucked in.  I now have an 02 F550  12 ton  161" WB and I also have no issue with it as far as steer axle weight goes.  All the responses to your issue have indicated that it is a given to beef the rear springs on a wrecker.  As previously said, this will due little to offset front axle weight relative to W/L extension.  Hope this helps - thanks, Steve.