F40H.D. vs. F41

[GreyGoose006]

what exactly is the difference between the F40 and F41 suspension options on the 80's caprice sedan.
specifically the 84' sedan.
i was looking at a sales brochure and was just curious what qualifies as Heavy duty versus Sport
seems like stiffer sway bars would be a sport part, but could also qualify as heavy duty since they were standard on the front anyway. stiffer shocks are definetley a sport part, but could also be heavy duty if the valving was geared more towards hard use on rough pavement...

i'm confused

[silicon212]

F40 Suspension System, Heavy Duty Front and Rear
F41 : Suspension System, Front, Rear, Firm Ride, Handling


F41 has rear anti-sway bar.

[capriceowns]

nvm my post, silicon nailed it.

[PeteA216]

So, what do I have on my '84? (or did I used to have when it was stock) I dont have a sway bar on the back, only on the front.

[Blue Bowtie]

Originally Posted by PeteA216

So, what do I have on my '84? (or did I used to have when it was stock) I dont have a sway bar on the back, only on the front.

See above. It's probably F40, but the RPO list/SPID label would clarify that. 1984 should have had a white/gray RPO label in the trunk, and may have also had the boilerplate on the firewall (I believe that was the transition year in most assembly plants).

What you have is mush. That's great if you're just boulevard cruising. If you want a little more compliant steering and ride, you might want to look at new springs with the same height but a higher rate, especially since your springs are 20+ years old. Think about a larger stabilizer bar up front, like BMR or Hotchkiss F-Body 1½" types (with new bolts and new end links), and installing a rear bar. Some station wagons had a large rear piece, but they aren't anywhere as stiff as the F-Body types. A fresh set of monotube shocks with tighter rebound control will help. And make sure you have a full compliment of body mount bushings (see Scott Mueller's article at http://www.theherd.com/articles/bushings.html).

[GreyGoose006]

i was looking for maybe a list of parts for each one that was bolted on to qualify the extra cost of each.
mine has neither, but i was wondering what was in the packages, and what the differences were.

[PeteA216]

As for my suspension, I've replaced the entire thing minus some bushings and body mounts. The springs were replaced in the rear with a variable coil spring, which is supposed to take weight better, and the shocks have been replaced with Monroe ltd lifetime shocks. Its nothing special, but It helped out big time having replaced the near 23 year old suspension. They've been holding up a lot of weight for a long time. Im not TOO worried about the handling... I mean well, it doesn't even compare to the handling of a newer car, but the ride is smoother than ANY new car I've ever ridden. Don't get me wrong, new cars have a smooth ride, but its a different kind of smooth. As for a rear stabilizer bar, I heard that stabilizer bars can take away from the smooth ride, and don't do as much on a solid axel as they do on an independant suspension. Just my .

[GreyGoose006]

lets try it this way:
i'm a prospective buyer of a brand new 84 caprice classic, and you are a salesman trying to sell one of the last three on the lot before the end of the 84 model year. one has an F40 suspension and one has an F41. the other has the stock, no options suspension.
you are trying to sell me the F41. (more expensive)
i am asking you why i want to spend the extra $49 and what it will get me.
what is in it that is better than the $26 HD suspension or the free stock suspension.
SELL ME THE CAR.
i want to know the parts involved in the extra cost

[silicon212]

Well, the F41, as on a 9C1, comes with Bilstien shocks, stiffer springs, and that rear sway bar. It gives a rougher ride than the pillow-soft stock suspension, but carries the corners where the stock won't. The rear sway bar in conjunction with the valving on the shocks helps to keep the car more level during cornering and helps keep the tires on the road, where they belong.

I'd get the F41 suspension, if no other reason than for safety reasons - at high speed and when the road is wet or during other adverse conditions, it's nice to know that the tires will hold the road as good as they can.

[PeteA216]

Now thats one heck of a sale's description right there!

[GreyGoose006]

so basically, F41 is code for 9C1?

[silicon212]

Originally Posted by GreyGoose006

so basically, F41 is code for 9C1?

I believe it was also on some later model Broughams, 1986 and newer.

[1968 Pontiac]

Will the front F body sway bars fit on the front of a B body car? I just saw a 80's iroc z front sway bar in the wrecker. Looked like a fairly stout piece.

[GreyGoose006]

it should if the lengths are the same.

CD smalley or someone wrote a really good thread on how to make caprices handle better, and outlined all the parts that fit.
its called how to make a b body handle on a budge or something like that

[1968 Pontiac]

Found it:

http://www.automotiveforums.com/vbul...d.php?t=321620

However, I have a few 9C1 rear sway bars and found there are two different attachment methods:

The earlier (I'm guessing 91-93 and before) sway bars attach to a short channel with two bolts through the holes in the sway bar, then this channel is slid into the lower control arm and fastened with two self tapping bolts from each side. The channel is still available from GM as I bought them a few months ago. This method of attachment will work for any B (and C?) body sedan (not wagon) from 1977 and up as the lower control arms have the required holes to fasten through to the sway bar mounting channel.

The second method (from 94-96?) will require a change on lower control arms as the same sway bar as used above is attached with long bolts through the top of the lower control arm right throiugh the mounting holes in the sway bar. There are a couple of small steel brackets the keep the sway bar in place. Less parts required, which is probably why GM switched the attaching method.

Which method provides better handling? I don't know. But from all the rear sway bars I've seen in the wreckers, the second method is definatly better if you don't want your lower control arms rusting out, as the moisture can drain away. Of course if you undercoated your car from new, you won't be worrying about rusty control arms.