Henryv

Hey has anybody here experienced having their 4runners like jerk forward a bit sometimes after stopping completely from braking? like say youre completely stopped at a red light, then let go of the brakes and it jerks forward a little? Mine does this occasionally and I'm wondering if its normal or not? thanks.

dijjid

i thought there was something wrong with my breaks but then i talked to my dad and he said it was just because it idels so high. That and i had been driving the minivan for so long that i forgot what a powerful truck with good breaks was like. No there is nothing wrong with your car they are all like that

Kings4Runner

Hmm actually mine does that too. however I had heard that it is the play in the driveshaft or in the shaft joint that is releasing. I greased the joints real good and it solved the problem for a while, it did come back though. Sorry for the lack of terminology so if anyone else has the exact answer chime in and correct me.

44Runner

No, but it does when I let off the clutch!

Gadget

Two things contribute to it.

Have your rear brakes properly adjusted.

Have your drive shaft greased paying particular attension to the slip yoke.

Gadget

www.GadgetOnline.com

UNLIMITED96

i notice that when i have the a/c on, the engine
surges when the a/c pump cycles therefore the vehicle
receives a power boost

10gaOkie

I have a '99 4X4 4Runner with auto trans. Mine is doing the same exact thing. I haven't located the problem yet but believe it to be something with the rear axle movement.

Chris

KZN185W

iTrader: (1)

if your a clunk or a thud from behind, there's a need to grease the propeller shafts and the cardan joints. iirc, there are 7 grease fittings on both the front and rear propeller shafts, including the cardan joints

BoostedRNR

Lol, I'm glad I'm not the only one with this problem. I just bought my 00 4runner a couple months ago and almost all of the 5 we test drove, did the same thing. I figured it was just the slip yoke on the driveline, but am interested in anybody finding something else wrong

10gaOkie

I have come to the conclusion that it is definitely axle wrap that we feel when releasing the brake. There must be a way to reduce this. The first place to start I would think would be to stop the brake shoes from sticking if that be the culprit. Maybe there is a traction or suspension bar that would correct this?

Chris

jrobertson4runnner

I would say it has something to do with the driveline not being greased properly at the joints, as several other guys have said. These trucks are not all that powerful, so that is not really your culprit.


Okie- do you have coil springs, or leaf springs? If you have coil springs, then you're most likely not getting axle wrap, and even if you have leaf springs, I'm under the impression that it only takes place upon acceleration.

10gaOkie

J,
Thanks for your thoughts! Mine has rear coil springs and the problem only happens when I come to a complete stop and take my foot off the brake. When I do this, I feel a serge or give. Acceleration is normal and not part of the problem. There are no unusual noises happening. I just recently got the truck and have not greased anything yet. Other than greasing the rear U joint, I dont know where else to lube that might help.
Also I am getting gear noise from the rear third member which I thought might have occured due to the surge problem over time.

Thanks
Chris

corax

If it feels like someone just tapped your back bumper when you let off the brakes, usually after a pretty quick stop where the rear lifts a bit, your most likely just looking at the rear slip yoke binding a bit - the bump you feel is the slip yoke releasing once you let off the brakes and everything un-binds. This is fairly common in some trucks, I've seen it in Isuzu, Chevy, Kia and most recently Lexus Lx's.
The way I fix 'em is:
- pull the driveshaft
- mark the slip-yoke so it goes back together with the same splines engaged (doesn't get twisted, throwing off u-joint phasing and cause a vibration)
- pull it apart to clean/polish the slip yoke splines with a wire wheel (only if the splines are metal, don't use a wire wheel if the splines have a plastic coating on them)
- lube 'em with a quality EP Marine style grease and reassemble

Gerdo

All good suggestions.
I would also pull your rear drums and check for oil leaks. Either axle seals or brake cylinders. This will cause the brake shoes to stick to the drums. This will cause the feeling that you are experiencing.

dropzone

iTrader: (6)

Cool, glad to find a couple people with the same issue and folks chiming in with a fix.
Usually when you find a 6 year old thread bump you find other stuff (spam) going on...

Mjc8521

Having the same thing happening with my 4Runner. When applying the brakes and coming to a complete stop, then only after release my brake do I feel a small jerk in the front end of my 4Runner. I have the 2004 AWD SR5 4Runner. Has anyone come to a full and complete diagnosis on this issue? Thanks in advance.