Transmission thud?

[Qyota]

OK, onto the next problem I'm having with my 1999 Limited 4x4.

When coming to a stop, just as the vehicle finally stops, I hear and feel a slight thud or clunk from directly below me. It feels as if the transmission or something is moving a little due to the truck finalizing it's stop.

I thought I read a thread about this recently, but of course the search feature on this ancient forum software isn't helpful at all.

Transmission mount? Something else?

Truck has 133,000 miles, tranny fluid is clearish-pink and up to snuff.

Thanks!

 

[4Evr4RunN3R]

i have the exact same thing happen to me at stops. more then two years of owning the truck, im just used to it. i think its normal

 

[KellyJ]

It's slack in the drive line. I have the same problem. Lubing the U-joints on either end of it should help I think

 

[shootmymime]

KellyJ It's slack in the drive line. I have the same problem. Lubing the U-joints on either end of it should help I think

YUP

 

[Qyota]

OK cool. Thanks for the info. It's nice to know this particular problem isn't a serious one. In fact, it doesn't even do it all the time...just occasionally.

 

[LINY4Runner]

Working as a Toyota Tech I saw alot of these. Basically every Toyota truck has this design.

1. Get yourself a good grease pump, you'll need it alot as this temproary solution only lasts about 3000-5000 miles.
2. If you can get under the truck without jacking it up, go for it, but you may need to rotate the driveshaft to line up the grease fitting.
3. Look for the grease fitting on the DRIVESHAFT itself, not the u-joint. Pump grease into this fitting. As you do, you'll see the drifeshaft start to expand (like a shock).
4. Don't pump it too much, or you'll squeeze grease through the seal and have a nice mess. You will only release about an 1 to 2.5 inches of play before it stops.
5. If you DO over pump it, don't panic. Wipe up the excess grease with a rag so it doesnt sling all over the bottom of your truck. Take it for a drive, and repeat step 5 as you may have squeezed some more out.

Repeat for the front driveshaft.

That will virtually eliminate your knock in the driveline. I do mine every time I change my oil as a basic guideline.



-While you're under there with the grease gun, lube up the u-joints too...it couldn't hurt-

 

[Victor]

Working as a Toyota Tech I saw alot of these. Basically every Toyota truck has this design.

1. Get yourself a good grease pump, you'll need it alot as this temproary solution only lasts about 3000-5000 miles.
2. If you can get under the truck without jacking it up, go for it, but you may need to rotate the driveshaft to line up the grease fitting.
3. Look for the grease fitting on the DRIVESHAFT itself, not the u-joint. Pump grease into this fitting. As you do, you'll see the drifeshaft start to expand (like a shock).
4. Don't pump it too much, or you'll squeeze grease through the seal and have a nice mess. You will only release about an 1 to 2.5 inches of play before it stops.
5. If you DO over pump it, don't panic. Wipe up the excess grease with a rag so it doesnt sling all over the bottom of your truck. Take it for a drive, and repeat step 5 as you may have squeezed some more out.

Repeat for the front driveshaft.

That will virtually eliminate your knock in the driveline. I do mine every time I change my oil as a basic guideline.



-While you're under there with the grease gun, lube up the u-joints too...it couldn't hurt-

Mine does it as well. A lot of complaints we get are from 4th gen owners with the slip yoke clunk.

To further expand on what LINY4Runner said, If I am not mistaken there's a Toyota Tech Tip on removing the slip yoke (marked properly to go back in the same spot after) and cleaning it and using a special Ford grease for the slip yoke.

 

[LINY4Runner]

To further expand on what LINY4Runner said, If I am not mistaken there's a Toyota Tech Tip on removing the slip yoke (marked properly to go back in the same spot after) and cleaning it and using a special Ford grease for the slip yoke.

I haven't heard of this one...sounds like alot of work...haha

 

[01t4rnr]

MAN im glad im not the only one, thanks for the replies!! Ive neen noticing this more and more and hoping it wasnt something slipping in the tranny. I know there are quite a few zerk fittings on the driveshaft, can somebody point out (maybe a picture) which are most important to fix this?

 

[01t4rnr]

Well i found a writeup and i definitely missed a few of these fittings:
http://4runners.org/writeups/zerk/index.html

 

[LINY4Runner]

There should only be one that's on the drifeshaft itself...it'll be on the bigger half of the slip yoke, the recieving half, if you will...and it should be right on the lip where the yoke slips in.

 

[Victor]

I haven't heard of this one...sounds like alot of work...haha

It's not a guaranteed fix either, and it doesn't look like Toyota will resolve it either (Replacement Updated Driveshafts...I wish!) Oh well, I'll keep telling my customers that!