Transmission slipping in OD???

[run4estrunner]

I have a 2005 sport 4wd with the v6 with a little over 120k miles on it and very well taken care of. Today i was driving on the freeway at cruising speeds. I was going about 65-70 mph at about 1800-2000 rpm on a very slight up hill, so there was a little bit more of a load on the tranny than just driving on flat road. The tranny was in over drive and i noticed a slight jerk with a clunking noise happen about 5 times randomly right around that certain rpm. They felt like quick little slips. It doesnt happen at any other time, not even on larger grades or faster speeds or higher rpms. Has anyone heard of this problem?? Are there any threads that talk about it? Any info would be great. Thanks! :cry2:

 

[2UZ]

Have you ever serviced your transmission? Did the torque converter unlock and re-lock?

 

[aha2988]

it doesnt sound good, in my experience slipping transmission symptons would be increase in rpm with no power transfer response (i.e. when pushing the gas pedal to increase speed, a feeling of laging or time in between throttle application and throttle response from the wheels) clunking noises can be syncronizers breaking, gear teeth breaking, clutch packs cracking, (basicly internals failing) have you kept up with the transmission fluid changes regularly and all other driveline gear oil cases? i no you stated its well taking care of but is there anything you might have forgotten to check or maintance i only ask cause there are people that change there oil regularly ang grease axels regularly but have no idea there timing belt requires replacing every so often you know?

 

[run4estrunner]

As far as servicing the transmission, I bought the car at just under 120k with a very good car fax record of being serviced at the same toyota dealer every time. I called and spoke with the service center at that dealer and they have records of doing all the preventative maintenance on the severe service schedule. So yes the transmission was serviced at 60k and is actually due for 120k. Would the fluid being due to be changed be causing this slight hiccup? I am going to be doing all of the fluids (A/T, Diffs, transfer case, and oil) along with my spark plugs this weekend for the 120k mile service.

 

[dwm2112]

Your description sounds almost identical to an issue I had with a Chevy Z-71. In my case the culprit was the torque converter and was a fairly common problem with that transmission. I am not aware of known failure trends for the Toyota transmission but your symptoms are pretty much identical to what I had. In the end it means dropping the transmission so I went ahead and had it rebuilt since I was already in for all the labor to drop it. Hope yours is something less than mine was.

 

[aha2988]

As far as servicing the transmission, I bought the car at just under 120k with a very good car fax record of being serviced at the same toyota dealer every time. I called and spoke with the service center at that dealer and they have records of doing all the preventative maintenance on the severe service schedule. So yes the transmission was serviced at 60k and is actually due for 120k. Would the fluid being due to be changed be causing this slight hiccup? I am going to be doing all of the fluids (A/T, Diffs, transfer case, and oil) along with my spark plugs this weekend for the 120k mile service.

Go for the the fluid change and service all the cases, it might not hurt to flush the tranny a time or two due to not being able to get all the fluid out of the torque converter, toyota may have a machine that will pump clean fluid through it for a bit before they refill it. doing alot of trailoring or running in any kind of extreme conditions can shorten the duty span of the transmission so sometimes the factory service schedules need to be shortened so to say if it says every thirty thousand change so in so and your in extreme conditions or towing regularly you should consider every 20 thousand miles. im not trying to tell you how you drive your truck or how to take care of it just another opinion. we did a tranny swap in my buddies duramax 2500 and when we got done had this hellacious rattle coming from the bell housing we pulled the torque converter bolts added lock tight put them back in same rattle occured in our case my dumbass buddy didnt realize his new torque converter came with new shorter bolts lol so once we put the new TC bolts in rattle went away everything worked fine this is my only experience with transmission noises.

 

[galactic_04]

It really sucks that you just bought the truck and it's slipping! So you got what? 1000 miles before an issue popped up? I'd be tempted to talk to the dealer that sold it and see what they have to say. They obviously didn't drive the car much when they got it in and didn't realize that someone got rid of the truck for that reason.

 

[superman3043]

I hope she's not a gonner man.

I don't know enough about it to make a recommendation, but a mechanic friend of mine did once recommend this to his customers.

Once you get an good diagnosis and weigh your options, you may want to give it a go as a last resort.

Hope this helps man. Good luck!

 

[michaelharrisco]

what happened

Hey run4estrunner, what have you ended up doing / finding out?

What yo describe is exactly what is going on in my 2000 4Runner with 190K miles so I'm curious. I'm debating right now about taking it to a shop and just writing a check or trying to figure it out myself.

Please update.
Michael

Note: this is my first post on this forum. I'm very active on ih8mud with my 78 FJ40, but I found this post when I googled so I wanted to chime in.

Thanks for having me on...