I just hit 67K miles and do for an oil change, was wondering when I should change my tranny fluid, it's never been done. Thanks

 

Yes, drop the pan and change the fluid! Every ~30K

 

Don't mean to thread jack as it does pretain to it,but when i change my trans fluid i'm going to be using Transynd. I'm told that synthetic maynot be good for the ol 4l60e. Any thoughts on this.

 

I used to run M1 in my stock trans but i think now it's probably a waste of $. My FLT trans runs only Dex III.

 

changings fluids are said to be done every 30K miles.. if you have rather high mileage (60+?) and are unaware of the history of fluid changing then you continue to change it every 30 but do not do a complete flush. DOing so can damage your tranny and/or shorten its life.


With this kinda thing in mind.. don't mind me for hijacking the thread..

I'm about to open my tranny up to install the servo's and the **** kit. I have no other choice but to change my fluid. Do I follow through with a flush? Or just replace the fluid/filter that was lost. I have 65,300 miles on an '03

 

...yes...hell yes...Trever1t is right! I do mine every 20K miles but never let it go pas every 30K. Keeping the fluid clean and keeping an eye out for metal in the pad is the life of your tranny. And I woulden't hurt to put a deeper pan on there. The more fluid, the cooler the fluid, the longer the tranny lasts.

 

this guy is right.

i would recommend you just changing the filter and fluid that was lost.

 

When you change the fluid, you don't actually get all of it out. I thought with a flush you atleast replace all the fluid

 

With a flush, as the theory goes,if you haven't maintained service on a regular basis, you might dislodge gunk and cause failure.

 

The ol faithful "change your tranny filter and loose your tranny" phenom! lol...I hate when that happens....and it DOES!