Serious 4runner issue after lift

parks71

New member
I lifted my 03 4runner with a OEM lift, no issues. I then put on tires a week later and no issues. THen about 2 weeks later, I take it to the shop and have it alligned. I also had to change one of the tie rods because it wouldnt break loose.

After picking up the alignment, it drove very straight. On my way home, about 5 miles from the shop I was going 70 mph and all of a sudden, with out warning, the truck jerked hard right and almost caused me to flip the truck. It really freaked me out. I took it to a different shop, one that specializes in lifted trucks and they could not find anything wrong. I also took it back to the shop and they couldnt find any issues.

I was scared to drive it for a while but now, 3 months later, no issues until tonight.

My daughter was driving the truck and she said it jerked to the right, then left and traction control kicked in with three beeps and she saw the light come on and it started jerking backwards too i guess trying to brake. She was going aroudn 50 getting on the highway. So she turned around and it did the exact same thing 2 more times on the way home. She was terrified and came back crying saying she thought she was going to die. I go to drive it and it does nothing for me.

I have no idea what is going on and no shop is going to be able to figure this out if it doesnt do it. The only other piece of info I left out was the CV joints leaked after lifting it and threw a lot of grease out. Do you think on of the axles are catching causing the truck to pull then traction control kicks in? Any chance the new angle of my diff from the lift would cause this? I need some ideas because someone is going to get killed if this keeps happening. Its about to start snowing here in CO and if this happens on slick roads its going to be trouble. By the way, when she was driving tonight, dry pavement, no rain, no snow. Thanks for any ideas.
 
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Did you do a diff drop when you did the lift? Your CV joints may have been pretty worn before and now that you increased the angle of the shaft and joint it caused excessive wear and now the shaft is sliding in and out of the joint.

This happened to an Audi I use to have and I went many miles knowing the CV joints were bad. I was on the highway doing 65 and it jerked sideways and almost flew off the road. Changed the half shafts and all was goof. Im almost positive that's whats going on for you as well.

I know how scary that is man. Glad your daughter is safe.
 
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Did you do a diff drop when you did the lift? Your CV joints may have been pretty worn before and now that you increased the angle of the shaft and joint it caused excessive wear and now the shaft is sliding in and out of the joint.

This happened to an Audi I use to have and I went many miles knowing the CV joints were bad. I was on the highway doing 65 and it jerked sideways and almost flew off the road. Changed the half shafts and all was goof. Im almost positive that's whats going on for you as well.

I know how scary that is man. Glad your daughter is safe.

Cv's could cause that but it doesn't need a diff drop.
 
lol chill. I wasn't trying to come off as sarcastic. Im new to the whole lifting of runners and haven't yet done it myself and i've just herd of people doing that so thats one thing I considered without fully understanding. My mistake
 
lol chill. I wasn't trying to come off as sarcastic. Im new to the whole lifting of runners and haven't yet done it myself and i've just herd of people doing that so thats one thing I considered without fully understanding. My mistake

No I know. I wasn't trying to sound defensive lol. Go look at your cv axles now without a lift. You'll notice that they're angled upward from the factory. When it's lifted they only slightly angle down and don't end up with terrible angles. Your ideas were in the right place though.
 
I'm no expert on this but I doubt its your lift or alignment causing the issues considering nothings blown apart or what not.. It has to be your CV's I'm thinking either both/ 1 for sure is/are worn and is possibly irregularly slipping causing that jerking motion.

P.s... IMO, They must make diff drops for a reason. If they were worthless no body would make one. At 20 bucks and 10 min worth your time, for a little added assurance why not put one on, but that's my 2
 
I considered without fully understanding.
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:rockthrow:
 
Any chance you are getting some bump steer and are just not used to driving a lifted vehicle?

How much lift and what size tires are you running?
 
I wonder if its possible the shop that installed your lift damaged one of the ABS sensors? Usually when this happens the system just throws a code but maybe its possible the wire was only slightly damaged and is occasionally sending erroneous readings, causing random brake application and the rapid swerve you mention. This is just me spitballing, discuss...
 
Good ideas guys, thanks. I'm going to pick up the cv joints this morning, anyone have a good write up on how to replace them?

I also thought about the sensors but the first incident didnt happen until about a month after it was lifted which gave the cv joints time to spit out all the grease. People have said it will be fine for a while and there is no clicking but I am thinking this is the problem. If it were a sensor, I think it would happen more often and some type of light would come on right?

May drop the diff just to be safe as well.
 
It seems like there was a post exactly like this a while back, might try searching around, or maybe I'm losing my mind.
 
your not losing your mind, it was my post a few months back when it first happened. The mechanics had me questioning myself if i hit a pot hole or something and it didnt act up since so I figured the problem went away until yesterday.

I just dropped it off to a shop to have the axles replaced. the mechanic said it was either the axles or bearings but more likely the axle but he will inspect the bearings. Hope the i ssue will be solved after this trip!
 
your not losing your mind, it was my post a few months back when it first happened. The mechanics had me questioning myself if i hit a pot hole or something and it didnt act up since so I figured the problem went away until yesterday.

I just dropped it off to a shop to have the axles replaced. the mechanic said it was either the axles or bearings but more likely the axle but he will inspect the bearings. Hope the i ssue will be solved after this trip!

Well, nice to know I'm not totally losing it!

Good luck.
 

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