Unimog axles cj 5 4 link suspension - Page 2 - Off-Road Forums & Discussion Groups

cj68man · #11 10-31-2009, 08:40 AM

Thats a great point The springs in the front may be to stiff. im hoping the back ones are a little better becuse i took the pig tail out from in the middle of the larger coil. Tis will probally help. thanks for the input, josh

spook2 · #12 10-31-2009, 09:48 AM

Quote:

Originally Posted by cj68man

Thats a great point The springs in the front may be to stiff. im hoping the back ones are a little better becuse i took the pig tail out from in the middle of the larger coil. Tis will probally help. thanks for the input, josh

Removing the center coil would help, if you wanted a flexier Mog. That center coil is the overload coil which means it's there to take up some load after you start adding weight to it. I have a radio box mog which weighs 9000-10,000 lbs. The radio box itself is about 2000# and it barely compresses the main coils at all. It doesn't even come close to settling on the overload coils. Nowhere near. I know you want to try to save some bucks on your build, who doesn't, but I really feel you'll be wasting your time mounting the stock mog coils on your CJ5. They are just wayyy too heavy duty for that application.

LEVE · #13 10-31-2009, 10:08 AM

In the past TTC the portal axles found that they'd do well... but beware... the weak point of the portal axle is the gearbox on each wheel assembly. That's the part that's going to take/distrbute the torque. You may find yourself scattering gearing...I'm just say'n...

WILL · #14 10-31-2009, 10:30 AM

A few years ago I started collecting TJ and ZJ coils. I would watch ebay auctions for stock springs that didn't sell then ask if they wanted to send them for the cost of shipping. I got a set of each for about $20 a set. I have since changed my direction and gave them to a friend but that is something you can try too.

cj68man · #15 10-31-2009, 10:40 AM

whats nice about the portals are I can run tires that are ten to 12 inches smaller than other competitors but I have a fraction of the weight on each side of my axle so im hoping the portal boxes ar not over worked. I know the axle shafts wont break there is only a 3.5:1 reduction in there and the axle shafts are thick and 40 splined.
As far as the coils go I would highly consider buying flexier coils. I want to win TTC. Money is not an issue. What do you recommend for coils? or anyone else have any ideas? the only difference is I would need to make slightly different brackets for the coils off my chassie. no big deal. i would also need for it to sit at around the same hight so my best bet is to measure the distance i want it to sit at, find out the mass of the back and find coils rated for that weight and specific hight. how does that sound for an idea? any good coil manufacutrers that anuyone can recommend? thanks again

LEVE · #16 10-31-2009, 11:02 AM

Quote:

Money is not an issue. What do you recommend for coils?

I remember back to the mid 90's when Tim Hardy's Samurai was coupled to a trailer... it floated through the TTC and usally took 2nd or 3rd place. That's pretty dang respectable. So, IMHO, it's not money that's the object... it's what you're doing, taking time, resources and research to combine them into a challenger. My hat is off to ya...good luck.

cj68man · #17 10-31-2009, 11:28 AM

thanks I appreciate that. Your right how its not about the money, i agree, but boy oh boy building TTC jeep becomes costly, but then again its all relative i guess. You get what you pay for a lot fo the time also. i just wanted to let the readers on the fourm know that not paying attention to cost which part is the best/strongest for my application I have also come to realize how being patient is extreamly key, and using resources such as these fourms.

Any good custom coil fabrication sites?

spook2 · #18 10-31-2009, 04:18 PM

Quote:

Originally Posted by cj68man

win TTC. Money is not an issue. What do you recommend for coils? or anyone else have any ideas? the only difference is I would need to make slightly different brackets for the coils off my chassie. no big deal. i would also need for it to sit at around the same hight so my best bet is to measure the distance i want it to sit at, find out the mass of the back and find coils rated for that weight and specific hight. how does that sound for an idea? any good coil manufacutrers that anuyone can recommend? thanks again

If you do some investigating on some Mog sites you'll find that a lot of them use TJ lift coils. By that I mean not stock TJ coils but coils that would lift a TJ say 5" or so. Those numbers aren't absolute but just for reference. The point is that even MOG owners tend to not use mog coils when they want a serious rock crawler. Mog springs are made for weight and not necessarily flex.

Try this link... Unimog - Benzworld.org - Mercedes-Benz Discussion Forum and do some searching. There is an amazing amount of mog info to be had there. Should come in handy for your project. Good luck.

cj68man · #19 10-31-2009, 04:50 PM

I spent some of today online and I found that the stock tj coils are the correct hight to fit between my frame and axle mount when compared to the unimog ones I had. The stock coils for a tj are said to have a spring rate of about 142 where as depending on the company the lifted coils can range from 140 to 210. I would prefer a lesser spring rate. Besides the spring rate how about the ride hight. Stock TJ coils are measured to be 16 inches tall with no load, where as the unimog coil is at 15 with no load. I figure with the differense in spring rate thats about equal? You mentioned not to use a stock tj coil, why is that?

spook2 · #20 10-31-2009, 09:20 PM

I didn't mean to say not to use stock TJ coils, only that most of the info I've seen where a mog owner has used TJ coils they've used TJ coils that are for a TJ lift application. Here again the point I was trying to illustrate is that for a rock crawler factory mog springs are too stiff EVEN FOR A MOG, let alone in a CJ.