Just got done reading some of the tech articles about flushing brakes and tranny fluid and all. The tranny fluid, brake fluid and diff. lube have never been changed since I got the 4 runner used with 45000 miles on it. It now has 135000 miles on it.:rolleyes: Im wanting to buy the powerflush for the brake system. I think that needs to be done and it should go without a problem. I also read Gadgets writeup about the tranny flush. Although I dont think the tranny fluid smells burnt or shows particals in it, Im wondering if I will kill it by flushing at this late date? Also, could there be any problems caused by changing the Diff. lube? Any reason to use synthetic on the tranny (if I flush it) or the diffs? I use synthetic in the engine. I do tow a 2500 boat about 10 miles round trip to a local lake on weekends, and have towed it about 400 miles round trip twice in the last 2 years. So, what to flush and what not to flush?

 

Hey Mon. The tranny flush ala Gadget needs to be done at a shop that has that total flush machine. Most quickie joints don't have 'em. I went to a tranny shop. Labor only was about $150. I supplied my own Amsoil ATF...used about 20 quarts. Close to 300 bucks for the total job. Shifts nice and smooth (noticeable improvement ) and worth the peace of mind. Diffs are an easy drain and fill. Go Amsoil too. With the towing and stuff you do, your truck will love you. I have all Amsoil fluids in my Runner, I like knowing I've done my part to keep it running good.
butnut

 

that has got me to thinking as to should i change my tranny fluid or not?
there is no chance of getting a shop to do it as that is not somthing thathas ever been offered in the uk as far as i know so would you recomend a drain and refill?
I have herd horror stories about draining and re filling causing the tranny to give up the ghost?
any thoughts?

 

If you are to do a tranny fluid change to synthetic, I'd recommend trying your hardest to find a place that will do the full flush. Mine was changed out last year so I'm waiting another 20,000 miles or so and then I'm changing out diff/tranny fluid to synthetic.

If your transmission fluid is still in good shape and it doesn't look like there are any problems w/your tranny, you'll most likely be fine.

Synthetic will be much nicer on your transmission, especially if you tow/haul things. Do it for a performance improvement, but also to extend the life of your tranny.