What is this cow bell sound when shifting into gear??

I have a 1999 Tacoma Extended Cab, TRD 4WD, Auto transmission, 160,000 miles.

When shifting into gear either Drive or Reverse, I hear a cow bell sound from underneath the vehicle. I can't tell if its in the front or rear. It happens mostly when I'm in gear, then press on the gas. The best I can describe it is a cow bell being rung. Sometimes its one ring, and others its multiple rings. The truck seems to shift fine and I don't hear this sound when driving. Anyone have any thoughts on this?

Another issue:

Just recently this problem has been occuring and is freaking me out. Only when the engine is cold this occurs. I shift into drive and the truck jolts dramatically, like the transmission is slipping. It happens a couple of times, then catches and I'm able to drive. It ONLY happens in the morning. Reverse seems to be ok. It's only in drive where it slips. In the middle of the day when the engine is cold, this doesn't happen. It only occurs in the morning. Please any help on diagnosing this would be helpful.

Thanks!

 

just seems like your clutch packs in the transmission are a lil worn and its takeing more fluid pressure build up to activate them, not bad nor good....


have you ever changed the fluid, if not i reccomend it, but do not flush it if its never been changed before

 

sounds like you arent using your parking break..mine does that when i forget to put it on...

 

I actually just flushed. I took her into the shop for a complete high mileage tune up. However, this sound was occurring before I did this. It's the transmission slipping that is new. It doesn't seem like this is something I can handle on my own. Or is it?

 

cowbell sound is normal

slipping could be caused by the flush, when older transmissions are flushed it can knock loose particals that may have been holding things together or cause o-rings to leak or become dislodged.

since you flushed you wont need to change the fluid for about 30k more miles

the slipping could be caused by this, but id give it time to see if it evens out, if it gets worse as a last ditch effort id drain the fluid and replace 1 of the quarts with Lucas Transmission fix...but only as a last ditch because things like that can cause transmissions' o-rings to quit contracting and slip off with time

 

No one thinks it's his U-Joints?

OK.






http://www.funnyordie.com/videos/80a71ef8cb/more-cowbell

 

Ur tranny scraping the ground

 

I think it's my U joint and I know very little about car mechanics. It's still doing it.

And now, my truck jolts when coming to a stop. I press on the brakes, and just when I'm to a stop it jolts at me, like I'm being hit from behind.

At this point I'm worried.

 

hahaa i was waiting for someone to do it! it had to be done!!

 

U joints

 

Anybody figure out what this problem was? It sounds eerily familiar to what I have going on