transmission flush help
 

hi all im new here and need help.
i just goy a 1996 chevy blazer 4wd 4 door, my problem is that the guy said it was leaking coolant but didnt know where it was going.
i bought the truck thinking it was just a head gasket or intake gasket but it is going to the transmission.
the blazer runs good and what i wanted to do was unhook the tranny from the radiator since thats where the coolant is getting in to the tranny and just put a external cooler on it and plug up the old tranny cooling holes in the tranny.
i want well need to do a tranny flush but 1. dont want to drive it to the shop. 2. no money to tow it to a shop or even pay them to do the flush.
can i unhook the tranny lines and let it drain in to a bucket on the exit side and have a jug of fluid in the in side turn on the blazer and let it cycle out the bad as its sucking in the new fluid till i run about 15qts out of it, then hook up the cooler and top it off?
does that sound like it will work or should i do it some other way and if so can some one explain what the best way to do it in detail if possable.

thank you so much and sorry for beeing such a noob:icon_wink:

Idk interesting idea you have. Would like to hear what others think about this.

Don't know about the poor man's flush (it does sound interesting though) but I do know from experience (young son) when you get water/coolant in the tranny you'd better stop like right now or you're loojing at acomplete teardown. I would instead just do a drain on it and maybe hook some sort of flush with trans fluid up to it while I had the pan off. Believe me when I tell you water/trans fluid mix will ruin the trans ib a hurry.

the only reason i would try the method as stated above is because thats the only way i can think of getting fluid out of the torque converter, (well i think it will get it out) should be around 6 or so quarts in there and i want to make sure all of it is replaced with fresh fluid.
if any one has any other way of doing it i will gladly take advice, i want to have it up and running this weekend im hopeing.

I have done this on a few occasions and it has always worked out well for me. You will have to start the engine for this to work though. It helps to have another person with you as well.

You need to direct both cooler lines into a bucket (just extend them with some rubber hose - clear hose if you can). Mark the bucket in 2 quart increments as a rough indication of how much fluid you have pumped out. After each mark, top off the transmission with 2 fresh quarts of fluid. Continue to do this until you see cleaner fluid coming out of the transmission. It will likely take more than 12 quarts (dry capacity is ~11qts) so be prepared.

k i did the tranny fluid change and it came out so dark but then started running red around the end of the 2nd gallon and start of the 3rd gallon.
my 10 yr old helped me out he is actualy realy helpful, well the blazer runs shifts alot better o and i put the aftermarked aux cooler on.
i put a clear hose comming from the output of the tranny and just poured fresh in the filler as it was comming out at about the same rate and all went well.
then i cut my rubber tranny line to lengh and installed the cooler.
btw remote start helps so much when doing this :)
now i can play:icon_playing:with my new car.
thank you blazer community.

Good deal! Thanks for the followup!

if it had water in the fluid for any length of time, you better be prepared for early trans failure. clutches in a automatic doesn't like water. they will start flaking and separate. leaving you with a non functioning unit.

water was not in there long and and minimal was in there stoped driving first sighn the water level in the radiator want down, the guy i got it from took good care of his blazer.
but if worst comes to worst there is a wrecking yard here in town that charges 55 for a tranny so 750 for the blazer and if it needs don 55 for a tranny 119k miles on the blazer i still call it a good deal and am lovin the suv.:icon_playing:

As anyone else tried the method for a transmission flush that 6700 describes in his first post? I haven't seen this method in any internet searches, but it seems to make sense. Are there any risks doing it this way? I haven't noticed any transmission problems, but I know that the fluid has not been changed since I've had the truck.