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Old 04-28-2010, 10:04 PM   #1
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Question about my suspension

OK, i bought my jeep awhile ago and it was already lifted for starters. I was told it had 11inches of lift, well i started looking around and really couldnt find a long arm kit for skyjacker that big.Tonight i crawled under, on front springs i seen the number Tj80fs(skyjacker) anyone know that part number?? To me it looks like its parts from different lifts, I know its 4linked, rocklock sway,and alot more things, just trying to figure out what long arm kit it could be, NOW i know i can clear 40s with no scrub at all. if someone can take a moment and help me on this one i would appreciate , can take any pictures you guys need or give more information

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Old 04-28-2010, 10:46 PM   #2
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think ive figure out alittle more, not four linked , sorry looks like rubicon express long arm radius kit. with skyjacker springs, still wouldnt mind some info from you guys. ill post some pics

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Old 04-28-2010, 11:06 PM   #3
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Old 04-28-2010, 11:11 PM   #4
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You only got 40s under that sum bitch? you should have like 42s.
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Old 04-28-2010, 11:12 PM   #5
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i only have 35s on it now, but i put 40s on it just to see and it didnt scrub but i didnt wanna wheel with 40s
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Old 04-28-2010, 11:13 PM   #6
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11 Inches of TL? How did he come up with that figure?
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Old 04-28-2010, 11:15 PM   #7
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honestly dont know, thats why im tryin to figure out where im close to totally lift, i know i can articulate a whole lot just want some clue on what lift or lifts i have
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Old 04-28-2010, 11:18 PM   #8
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What size tires are you running now?
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Old 04-28-2010, 11:20 PM   #9
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went back down to 35x12.50x15s but like i said clears 40s with ease
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Old 04-28-2010, 11:26 PM   #10
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this might help you for figuring total lift height

Name:  TJCoilSpringMeasurements.jpg
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im assuming that is not the compressed height though. so might be tricky to actually measure
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Old 04-28-2010, 11:29 PM   #11
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this might help you for figuring total lift height

Attachment 18609

im assuming that is not the compressed height though. so might be tricky to actually measure
it does and i measured the front from bottom to top and its like 24inches , so ??
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Old 04-28-2010, 11:37 PM   #12
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bout 12 inches then i think

seems every 1 inch increase comes out to a 1 inch lift according to the chart. but also i dont know it thats compressed or not. would make sense if the measurements are for non-compressed springs. cause there are so many variables weight wise when the springs are under the jeep.
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Old 04-29-2010, 09:37 AM   #13
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So can anyone tell me by looking at the pictures above what lift it could be?? And what's the difference between radius arms and 4link?? And what's a good way to tell what travel length of flex you can have ?
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Old 04-29-2010, 10:11 AM   #14
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Ya you nailed it, it's a rubicon express longarm kit with skyjacker 8" soft ride springs and other red skyjacker crap. it looks like the previous owner replaced the trans skid bolts that are supposed to be countersunk allen bolts with hex head bolts, probably because the countersunk bolts become so tight that sometimes the allen just rounds out before the bolt will loosen. Ask me how I know! It's just not as easy to slide over rocks and stuff with the hex heads sticking down.

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Old 04-29-2010, 10:42 AM   #15
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I see. Makes sense now. Thanks a lot for your info. Wonder where he got 11inch lift from lol. Think I'm bout to rip all of it out and start over with different setup. Any advice?
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Old 04-29-2010, 11:05 AM   #16
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I am far from being an expert on lifts and drivelines.
But something about all this blue seems wrong to me.


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Old 04-29-2010, 11:14 AM   #17
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I thought same thing, looks like oxidation to me but kinda looked like paint??? Wasn't too worried about that, but input on that would be good too.
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Old 04-29-2010, 11:32 AM   #18
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I am far from being an expert on lifts and drivelines.
But something about all this blue seems wrong to me.


Attachment 18612
The front drive shaft appears to be at close to it max slip.. hard to tell. the blue stuff is grease like to help hit move.. 40's with the stock axle will kill the jeep.
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Old 04-29-2010, 11:37 AM   #19
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Axles are rear dana 44 with detroit locker with alloy 4.56 gear , and front dana 30 (from what my mechanic told me with beefed up with locker and 4.56 gear. That would be good enough for 37s?? Oh and drive shafts are tom woods , has slip yoke elim. And heaty duty universal joints
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Old 04-29-2010, 12:39 PM   #20
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I thought same thing, looks like oxidation to me but kinda looked like paint??? Wasn't too worried about that, but input on that would be good too.
It's not the fact that it's blue (tha'ts just waterproof grease). It's just that you shouldn't see so much of it! I'm scared you're going to do an imitation of a pole vaulter.


(just realized 4Jeepn already done said that.)
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Old 04-29-2010, 02:15 PM   #21
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Lol. Hopefully I can clear the rock infront of me at the time. Ill get it checked out and see what my mechanic says.
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Old 04-30-2010, 11:41 AM   #22
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11"(or 8") of lift, 40s, 4.56s, and an upgraded D30/D44 combo! AWESOME!!! Might want to watch the stock steering though.

Is the t-case still a 2.72? Or is there a 4 to 1 upgrade in there? Auto or manual tranny?

Honestly, if you want to run 40s, and actually wheel it other than the mall, the front axle will NOT last. The rear is very suspect too. Even with a 35 spline alloy shaft and locker, the R&P will hate you. The 30 will explode. The stock t-case and gears will suck. The stock steering will fold like a wet noodle. You will have a very high COG. But you will look good doing all of that.
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Old 04-30-2010, 12:47 PM   #23
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11"(or 8") of lift, 40s, 4.56s, and an upgraded D30/D44 combo! AWESOME!!! Might want to watch the stock steering though.

Is the t-case still a 2.72? Or is there a 4 to 1 upgrade in there? Auto or manual tranny?

Honestly, if you want to run 40s, and actually wheel it other than the mall, the front axle will NOT last. The rear is very suspect too. Even with a 35 spline alloy shaft and locker, the R&P will hate you. The 30 will explode. The stock t-case and gears will suck. The stock steering will fold like a wet noodle. You will have a very high COG. But you will look good doing all of that.
x2 . . . I wouldn't consider 40's unless you throw some 1 tons under the thing or enjoy breaking stuff. A buddy of mine went thru several stock and cromolly axle shafts and a locker with just 35s on his Rubi with 44's . . . yes he's hard on stuff, but with 40's I just can't see stuff holding up. First thing I would do is replace that weak ass steering set up . . . even with 35's you are seriously pressing your luck with that stock tie rod.
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Old 05-02-2010, 09:27 AM   #24
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I see. Makes sense now. Thanks a lot for your info. Wonder where he got 11inch lift from lol. Think I'm bout to rip all of it out and start over with different setup. Any advice?
I don't think I would rip it out and start over as you have a real good lift to start out with, If you are going to run 35's just go back to 5.5" rubicon express springs and you should be good to go, plus you will have a much better CG. That is what I have and it rides better now than when it was stock.

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Old 05-03-2010, 09:40 AM   #25
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Plus, with 40s and stock width axles, you are going to rub EVERYWHERE when you articulate.....or turn the steering wheel. Even with 2" spacers and 3.75" BS wheels. Then your unit bearings and ball joints in the D30 will not last long either. 40s and a D30 are never a good combo, unless you are just going to the mall on Sundays.

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