Tech Questions Here (7 Viewers)

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my81fj said:
I made a few attempts at the driveshaft thing with no luck. I'm probably not doing it right. I should be back this weekend, I'm in MS right now. The help from someone that knows what they are doing would be great. Thanks guys
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Let's take a look at it this weekend...heck, I'm lifting my 80 big time tomorrow, so may have the same things on my mind...anyway, aside from the common mistake of shimming wrong, driveshaft out of phase, ANY LOOSEness ANYWHERE translates into vibes bigtime because of the increased angles. Worn U joints, worn splines on shaft...cause now its not all-the-way in, etc..even way too much grease in it could cause a little vibe...we'll help you find the culprit over the weekend...just hand in there. Had guys change everything, and later find out that the output shaft on their xfer case was worn...anything loose before, shows up under the increase pinion angles after you lift....even if not noticed before...alot of people goto CVjoints as a partial solution.
 
Great. I can give you a hand when I make it back in town, should be sometime on friday and i will be around all weekend. I just have to kiss the kid and kick the wife(hahaha):)
 
Well after talking to Mike he gave me some ideas. I took the back driveshaft off and drove around no vibration from the front. I stuck the shaft back on with everthing lined up vibration came back. i decided to take the caster shims out of the rear and I still a vibration but it is very small and it as at 55 mph verses 40 mph. Almost there.:beer::beer::beer::beer::beer: :beer::beer:thats how many it took to do all this
 
my81fj said:
Well after talking to Mike he gave me some ideas. I took the back driveshaft off and drove around no vibration from the front. I stuck the shaft back on with everthing lined up vibration came back. i decided to take the caster shims out of the rear and I still a vibration but it is very small and it as at 55 mph verses 40 mph. Almost there.:beer::beer::beer::beer::beer: :beer::beer:thats how many it took to do all this
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Yeah, I think that's step #6 in most of by manuals....anyway, after I finished yard work and the rain stopped, I decided to go by an air ratchet, coil spring compressor, and some other misc. tools...hope to get my springs on tomorrow...we'll see....didn't get anything done today. Glad you made progess....almost there.:beer:
 
my81fj said:
Well after talking to Mike he gave me some ideas. I took the back driveshaft off and drove around no vibration from the front. I stuck the shaft back on with everthing lined up vibration came back. i decided to take the caster shims out of the rear and I still a vibration but it is very small and it as at 55 mph verses 40 mph. Almost there.:beer::beer::beer::beer::beer: :beer::beer:thats how many it took to do all this
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Thats good to hear. You may only need 2 degrees in the rear, how did the u-joints look?
 
they look old I do have about 1mm of movement. Everything I read on this site says to change them so I will change them out.
 
If you have to order them, I have a set of Ujoints in my 40...brand new....I think all are the same up to something like 1990....with 2F 3F that is....you can always come get these if you need.

I am likely gonna be killing myself trying to put the springs on myself with minimal tools....I did go out and buy some more tools last night...hope to get it done today....
 
tabascoloco said:
If you have to order them, I have a set of Ujoints in my 40...brand new....I think all are the same up to something like 1990....with 2F 3F that is....you can always come get these if you need.

I am likely gonna be killing myself trying to put the springs on myself with minimal tools....I did go out and buy some more tools last night...hope to get it done today....
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the trick i used was to disconnect the shocks and the rear panhard bar (the one behind the axle that is parrallel to the axle...i think thats call the panhard bar), put the jack under the pumpkin, lowerd the axle, then have i pushed down on the end while a friend "unscrewed" the spring from the seat. i had a harder time getting the torsion bars out of the arms.


edit:, ive heard of people using bottle jacks between the frame and axle to push it down, however i couldnt find a spot on mine to do that
 
Thanks for the advice Cole. Everything went smoothly. The front went quickly and smoothly. I had so much travel, that I only needed one floor jack. I even had enough stock brake hose to leave it connected...in fact, the old springs practically fell out, and the new springs went in easily...I didn't even need the coil spring compressor that I bought. The rear end was trickier, because I didn't jack the frame up high enough...finally put the Hi-Lift on the rear, got it higher, and had to disconnect the sway bars, and brake line bracket. The I was able to drop it. There was LOTS of room everywhere. Installed shocks, steering dampener, etc.

Notes: I like the differential axle breathers on the 80 series ALOT. I would like to see if they fit a 40 series. I'll add some length to them when the snorkel goes on.

My stock tires are so TINY. It's hilarious. There is a tremendous amount of travel in the 80 suspension already. I've read lots about what folks are doing to increase theirs, but I don't think I'll need any more than what I saw today unless I go to Arkansas or Moab.

Test drive and first impressions: Drives like a dream. Old shocks weren't shot...they were still okay. Stock suspension was just to bouncy. I was worried about steering and driveline vibrations due to all the threads I'd read about. I had none of these.

I have the castor correction kit, and plan to have these installed later this week. I want to drive it a few days to "see" and "feel" the difference. I also want to actually MEASURE my castor and see what I have first. I don't see how someone can "know" what you need. Each rig is different. Also, I looked at Man-A-Fre's drop bracket kit, but its just a couple of pieces of flat steel that you bolt on (or weld)...I think they're out of their minds charging hundreds for that. I took a drive around in the rain...handles great...rides great.

I left the center caps off, as I kind of like the way the solid full floating axles look. May just leave it. Stopped raining, I'll go take some pics.
 
Well, it started raining again, but I did get a few pics...I definitely need to decide on tires. Up for suggestions. I am looking at 295/75/16 and 305/70/16 for all around performance and travel. BTW, the Stock catalytic converters (there were two) were replaced by a Stainless Magnaflow along with Flowmaster muffler just prior to the lift. The magnaflow clears the frame and will allow for sliders to fit nicely. The factory cats were hanging low and I thought they'd hit easily on the trail. I went out for a drive in the rain and filled her up. Here are a few pics on stock tires and OME 850/863 J-springs no spacers. Kept raining, all pics came out dark...finally got MANUAL mode and forced flash to get a descent pic: Before lift, after lift, and the Magnaflow Cat:
before_lift.webp
PS_lifted.webp
cat.webp
 
Looks great Mike, sorry for not being able to get away and come help. As for tools your always welcome when you need them. Corey on the skid plates I don't have them but would like a couple sets. The beast in the shop has them so I took one over to Stephen Luke to see if he could reproduce them and I never heard from him. I'd like three sets as they are a must to have if your on the trails. I don't know about yours but the last couple lifts I did the u-bolts were bent into the factory skid plates to where I couldn't unbolt them so I torched them off. They are worth having to avoid tearing up the u-bolts or going with a flip kit. I'll touch base with Stephen to see if this is something he can do or I will go pick it up and you can use it as your template.
 
Volunteer said:
Looks great Mike, sorry for not being able to get away and come help. As for tools your always welcome when you need them. Corey on the skid plates I don't have them but would like a couple sets. The beast in the shop has them so I took one over to Stephen Luke to see if he could reproduce them and I never heard from him. I'd like three sets as they are a must to have if your on the trails. I don't know about yours but the last couple lifts I did the u-bolts were bent into the factory skid plates to where I couldn't unbolt them so I torched them off. They are worth having to avoid tearing up the u-bolts or going with a flip kit. I'll touch base with Stephen to see if this is something he can do or I will go pick it up and you can use it as your template.
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I'll email Stephen.

...fawker :D

me
 
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