I want to put the super heavy duty springs on the front, I found the part # for the TRW's #CS5716s but I cannot find anywhere on the net that sells them, napa has super hvy dty springs from Duralast part #FCS5716s almost the same as the TRW's # Do yall think these are the same springs from 2 different distributors? if so Ill buy em if not does anybody know where I can buy the TRW's? The front is sagging quite a bit and of coarse I want as much height as possible cause I wish it was a 4x4 plus I pull goosenecks part time (reason for the super heavy duty)

www.partsamerica.com ( aka Discount Auto/Advance Auto Parts ) has them listed.

CS5716
http://www.partsamerica.com/PartDetails.asp?SourceArea=&SourcePage=SEARCHRESULTS&MfrCode=TRW&MfrPartNumber=CS5716

Den

thanks now i feel stupid because i was sure discount would'nt have them so i did'nt even look thanks for the help

Let me know when your going to install them. Maybe i'll take a ride up and give ya a hand.

Den

There's a CS5716S and a CS5716 listed on the Partsamerica site when you search under 1992 D250 (I want to bring the front end up an inch or two).

What's the difference?

Is the CS5716 same as the old Moog 7226 and the CS5716S same as the old Moog 7226S?

What does "IFS-4000" mean, such as in the description: Front; HD; w/IFS-4000; Set of Two


Tx, DBF

maybe Independent Front Suspension with a 4000 pound rating?

Originally posted by Den
www.partsamerica.com ( aka Discount Auto/Advance Auto Parts ) has them listed.

CS5716
http://www.partsamerica.com/PartDetails.asp?SourceArea=&SourcePage=SEARCHRESULTS&MfrCode=TRW&MfrPartNumber=CS5716

Den

I still want to know how you keep coming up with and giving out this number for these springs? This website you are referring to does not, the moog site does not, haven't found any site that does.

Parts america gives 7226, 7226S for 91 & 92 trucks.

Carl

when I started this thread I had looked up super heavy duty springs on some oddball website w/ no aplication thats the # i got for super heavy duty front coil springs but never said for dodge I just ASSumed these were the right ones for my application but now I dont think so these springs do exist but I dont think they are for dodge when you type your truck model in for search it shows cs7226s according to the website these are the right springs from trw and ifs4000 is independant front susp. rated 4000 pounds

I remember seeing the specs on the CS5716S spring a long time ago. They were a heavy duty spring for 1 tons - if memory serves me. The spring rate was stiffer and the were about 3/4 of an inch shorter than the 7226S.

I've got a set of aftermarket Extra Heavy Duty Springs on order rated at 3251lbs each for a total capacity of 6502 lbs. They are made by S & G Enterprises. They are not due in until the end of Feb. Cost $159.95 for a pair. Even with the 7226S springs I don't have the lift Carl does on his truck.

Hope this helps

Bob

I went looking for a table with the various spring specs in it and found this one:

http://www.classiccarsprings.com/springrates.html

I copied out the data for the 7226, 7226S, 5716, and 5716S.

Obviously, the spring compacts according to how much weight is on it, which I take to be "spring rate" in the table. I guess "Free Height" is the length of the spring with no weight on it.

But what is "Install Height"?

Can I use this table to predict the loaded height of the front end relative to the other springs?

... and, what is the factory spring p/n so we can look that up.

Tx, DBF

I would think free height would be the spring out of the truck sitting on the ground. The install height sounds like installed in the truck with the weight of the truck on them.

Den

Here's a set of definitions I got from a specification web page.


Compression springs are wound or constructed to oppose compression along the axis of wind. They can be wound in constant or variable pitch along their length, be constructed of stacked spring elements, and can be straight, conical, or have a variable diameter. The most important parameters to consider when searching for compression springs are the dimensions. These include outer diameter, inner diameter, wire diameter, free length, and solid height. The free length is the overall length of a spring in the unloaded position. The solid height is the length of a compression spring when under sufficient load to bring all coils into contact with adjacent coils. Other important considerations include spring rate and design units. The spring rate is the change in load per unit deflection, generally given in pounds per inch or Newtons per millimeter (N/mm). Design units can be specified in English or metric units. Some manufacturers may specify both.
...........................

I'm not sure your version of Install Height is correct, given the spring maker doesn't know where they will be used and how much weight is on it.

But maybe it's the length installed with no weight on it, that the mfr designed it to be used in.

DBF

Here's the correct link to the 7226s you want
http://www.partsamerica.com/PartDetails.asp?SourceArea=&SourcePage=SEARCHRESULTS&MfrCode=TRW&MfrPartNumber=CS7226S&PartType=59&PTSet=A

Just to kick this around one more time.
According to how I read that chart of spring specs the 5716S has an almost 50% higher rating (3251# vs. 2224#) than the 7226S. It sounds like that's the spring we need to kill the "door stop" look! :cool:
When I searched the Parts America site for our application, one of the returns it gave was for a Mcquay Norris spring # FCS5716S for $86.99. I'm not sure what to think though, as it listed it's shipping weight @ 2 pounds! :confused:
I googled Mcquay Norris and got their site, but it gives no specs for their products. :mad:
I really want to be sure this time as I already bought a pair of 7226 springs from NAPA and I would rate them as "pre-sagged".
moT

We'll find out tomorrow. I'm taking the trek up to help CP install a set. I'm pretty sure he got the 5716's. We'll take pics and measurements. He's got some other new stuff he wants to throw on there too.

Den

That's great, let us know how it turns out!
moT

I used MOOG 7226S and they work Great. I pull a 30' fifthwheel all over the US and haven't had any problems with them. They brought the front end up quite a bit from where it was before I had them installed.