Factory spring mystery

[Mac]

Max tow, I kept the rear springs it came with.

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[Garemlin]

Max tow, I kept the rear springs it came with.

Yeah I have seen a few of you doing that with max tow. Guess I may end up having to be the Guinea pig swapping out just the front springs in a non max tow.

 

[ShadowsPapa]

Yeah I have seen a few of you doing that with max tow. Guess I may end up having to be the Guinea pig swapping out just the front springs in a non max tow.

Shouldn't be any problem. The max tow under the rear of mine aren't as "soft and cushy" riding as the Overland, but swapping the fronts with the Rubicon springs made pretty much no difference in ride up front, maybe a bit, but hard to tell. Might be all in my head........

 

[CerOf]

Someone needs to buy my Rubi take offs to experiment with.

They should provide the most lift being they are off a diesel rubi with factory installed hard top and metal bumper.

 

[ShadowsPapa]

Someone needs to buy my Rubi take offs to experiment with.

They should provide the most lift being they are off a diesel rubi with factory installed hard top and metal bumper.

Why don't we do the opposite - you take my Overland springs and put under your diesel and see if you can more easily reach the roof to wash it.
Seriously, if I didn't already decide I was done messing with springs and shocks and lift stuff - I'd do it just for kicks, for fun.

 

[WXman]

So did you find out what happened? I'm betting it's just a coil that got mis-tagged at the factory because a front coil installed on the rear would have been immediately noticeable.

In other news... since we're talking factory coils I'm dying to find out which coils are used on the EcoDiesel models in the rear. Do they have diesel-specific rear coils on these trucks?

 

[ShadowsPapa]

727 and 904? You MUST be an old Mopar guy like I am. Really miss my 340 Duster (the reason behind my username).
I agree with you fully, the springs even look correct, I just find it odd how the part listing doesn’t match.
At any rate, I’m really thinking I may go ahead and buy those Rubi take offs. I suspect it will help with the insane amount of rake I seem to have. When measured at the pinch welds, I have 2.5 inches of difference from front to rear, which is also what added to my wondering if the springs were somehow wrong. Most say it’s 1.5 or 1.75 difference.

Always liked the MOPARS of years past - but my main experience with them was doing transmission repair and rebuilds in one shop I worked in - and guess what's in my 73 Javelin - a 727 with an AMC specific case. I have a couple of Eagle automatics in my shop and those are MOPAR built to AMC case specs with a transfer case on the rear.

 

[Jorgeperezjr]

Someone needs to buy my Rubi take offs to experiment with.

They should provide the most lift being they are off a diesel rubi with factory installed hard top and metal bumper.

I’ll buy it to test it out. I’ve got a Willys with a new fab fours stubby bumper plus winch so looking to lift the front an inch or so.

 

[CerOf]

I’ll buy it to test it out. I’ve got a Willys with a new fab fours stubby bumper plus winch so looking to lift the front an inch or so.

The shipping from TX to OH would be terrible.

 

[steveorama]

So, I’ve got an 80A that I purchased new with 12 miles on it. I’ve been thinking about getting Rubi take offs to give it a little boost, mainly to help with the rake. Anyways, I climbed under today to see which springs I have, and I’m utterly confused! The drivers rear spring is part number 68506117AA, which in all my searches shows as a front spring! What the heck is going on with my JT?

I know it's been a couple of months since this was discussed, but thought I would chime in on those spring numbers since I was doing some research on those same ones. I bought my '21 Overland last month and it had the following springs:
FL-7795AA
FR-6342AA
RL-6117AA
RR-6118AA

I haven't seen too much on these new spring numbers to differentiate them from the previous iterations to compare. Are they similar to last years overland or Sport springs? Better, worst, who knows?

 

[ShadowsPapa]

I know it's been a couple of months since this was discussed, but thought I would chime in on those spring numbers since I was doing some research on those same ones. I bought my '21 Overland last month and it had the following springs:
FL-7795AA
FR-6342AA
RL-6117AA
RR-6118AA

I haven't seen too much on these new spring numbers to differentiate them from the previous iterations to compare. Are they similar to last years overland or Sport springs? Better, worst, who knows?

Don't know how you can say better/worse because we have no idea what was changed or why.
My Overland -
Original front springs were 325&330AB
Rear springs were 439&440AC

Looking at your front springs - the numbers aren't even close. The rears on yours at least are 117 and 118 which speaking simply - makes sense.

 

[steveorama]

Don't know how you can say better/worse because we have no idea what was changed or why.
My Overland -
Original front springs were 325&330AB
Rear springs were 439&440AC

Looking at your front springs - the numbers aren't even close. The rears on yours at least are 117 and 118 which speaking simply - makes sense.

That's my point, with the new number sequencing that MOPAR is using on these springs it doesn't line up with the previous iterations where one could simply look at the 3 digit number and determine its place in the hierarchy.

It looks like I have the same springs on my JTO as @Garemlin and @jjdustr340 on their 80A and Willys.

 

[ShadowsPapa]

That's my point, with the new number sequencing that MOPAR is using on these springs it doesn't line up with the previous iterations where one could simply look at the 3 digit number and determine its place in the hierarchy.

It looks like I have the same springs on my JTO as @Garemlin and @jjdustr340 on their 80A and Willys.

I REALLY wish I knew someone personally involved in Jeep suspension design - I'd love to know what's up with these. It's getting really complicated, not that it was ever really simple. But at least there was some logic to it - for a while.

 

[jjdustr340]

I know it's been a couple of months since this was discussed, but thought I would chime in on those spring numbers since I was doing some research on those same ones. I bought my '21 Overland last month and it had the following springs:
FL-7795AA
FR-6342AA
RL-6117AA
RR-6118AA

I haven't seen too much on these new spring numbers to differentiate them from the previous iterations to compare. Are they similar to last years overland or Sport springs? Better, worst, who knows?

I used my Google-Fu for quite some time trying to figure it out and finally just gave up.
One reason I was even trying to figure it out in the first place is because I seem to have a TON of forward rake. More than the non-80thA editions I’ve seen around.
When measured at the front and rear of the pinch welds, I have 2.5” inches of difference.

 

[ShadowsPapa]

I used my Google-Fu for quite some time trying to figure it out and finally just gave up.
One reason I was even trying to figure it out in the first place is because I seem to have a TON of forward rake. More than the non-80thA editions I’ve seen around.
When measured at the front and rear of the pinch welds, I have 2.5” inches of difference.

I'll get you my other numbers later but CURRENTLY, measuring at the bottom edge of the running boards which seem to follow that pinch weld line pretty closely -
17.25" at the rear
15.5" at the front
Keep in mind I put in Rubicon front springs and max tow rear springs. The max tow springs were a shade shorter than Overland springs.
It gets more complex because I added a winch and steel bumper, so I'll have to try to find my original numbers, but I bet we were not too far apart in rake before I started Frankensteining my truck.

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