Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: dunl on April 20, 2009, 11:26:24 PM

Title: MJ front lift advice
Post by: dunl on April 20, 2009, 11:26:24 PM: Okay, so I bought an Eliminator, and I'm picking up comancherusty's parts for the unit:

sway bar drop brackets
Rocky Road tubular gusseted lower control arms, greasable urethane bushings for 3-6" inch lifts.
Rough Country adjustable track bar
Rough Country or Rocky Road (can't remember) bolt- on SPOA kit

The question is, what is the CORRECT thing I need for the front, and what could I probably find at the PNP in Calgary (heading that way Friday)?

Thanks for any help you can give,
Dunl
Title: Re: MJ front lift advice
Post by: WagoneerXJ on April 21, 2009, 07:55:08 AM: You'll need probly 4.5" coils to match the rear SOA lift. Maybe bigger. You won't find those in the junkyard.. F-150 coils might get you 3". You'll also need brake lines. Use YJ ones.
Title: Re: MJ front lift advice
Post by: JackstandJohnny on April 21, 2009, 08:30:44 AM: i can't imagine the f150 coils will ride well. proably like a dump truck, i mean an older f150 weighs twice what the lil' commanche weighs. might have to pony up some $$$$ for actual lift springs

to my knowledge as well, an XJ rear diff is set up for spring over axle, and would bolt in directly to your MJ......... a D44 would be a nice upgrade
Title: Re: MJ front lift advice
Post by: dunl on April 21, 2009, 09:48:26 AM: Quote from: JOhnnyC on April 21, 2009, 08:30:44 AM
i can't imagine the f150 coils will ride well. proably like a dump truck, i mean an older f150 weighs twice what the lil' commanche weighs. might have to pony up some $$$$ for actual lift springs

to my knowledge as well, an XJ rear diff is set up for spring over axle, and would bolt in directly to your MJ......... a D44 would be a nice upgrade

If I recall, I don't think ANY diff bolts right into a Comanche? Perches are different or something?
Title: Re: MJ front lift advice
Post by: JackstandJohnny on April 21, 2009, 09:56:50 AM: you could be right. a little birdie told me that it was possible. maybe an XJ guru can confirm!
Title: Re: MJ front lift advice
Post by: AV.NINE on April 21, 2009, 10:32:31 AM: IF the f150 coils get you 3"s, just add 1.5" spacers to the front, will sit you level at 4.5"s.
Title: Re: MJ front lift advice
Post by: stroker sahara on April 21, 2009, 06:11:40 PM: You will need more than 4.5" lift in the front to match the rear. I have 4.5" RE coils in mine with 2" spacers and it sits fairly level until I put the winch on. Mine also was a 2WD which has +/- 1" lower rear spring than 4WD version, depending on condition. Also, don't bother trying TJ coils. I tried 4" Superlift TJ/XJ coils and netted 1.5". As for the brake lines, I have read that YJ ones are good, but I found the listed length to be very close to the same. I have heard that a particular GM truck brake line of which I can get the numbers of are excellent for lifted TJ's and XJ'.

The rear axle from a XJ has a different width of spring perch centerline, so that isn't an option. If you have the D35 rear axle, I recommend swapping it for a D44 or 8.8 while you are doing the lift.

If you have any questions, feel free to ask me as I went through everything you did on mine last year.
Title: Re: MJ front lift advice
Post by: S-FLY on April 22, 2009, 03:17:23 PM: Coils are cheap, just order some Rusty's Off Road 6.5" coils:

http://rustysoffroad.com/mm5/merchant.mvc?Screen=PROD&Product_Code=RC-CS808-XJ&Category_Code=COILS
Title: Re: MJ front lift advice
Post by: big black dodge on April 22, 2009, 04:30:40 PM: when i did my mj years ago, i used zj 4.5" coils and a 2" spacer, and the truck sat level with a SOA. I think I also used a front driveshaft spacer and then had to grind the cross member a bit so the front drive shaft would not rub.