I heard that you can fill the transmission with gasoline, let it sit then dump the gas to clean it, the transmission is out of the car so that would be easy but should i really do this, and if i do how do i make sure all of the fuel is out of it, if this is completely wrong i would like some suggestions on how to do it before i install the tranny, thx

 

On a 700R4? No, you shouldn't do this.

 

then how should i clean it?

 

Change the fluid and filter.

 

Not to rain on your parade or otherwise be cruel or anything, but....

If you don't have enough experience know how to clean it, you probably won't have much luck getting it to work again after you take it apart, either. And you'll find that it will cost you a great deal more to take a crate of mangled parts to somebody to turn back into a transmission, than to just take the failed one someplace and get it benched without dinking with its internals first.

I'd suggest you get a little more education before tackling this job. It isn't something that somebody is going to be able to tell you how to do in an Internet post. Maybe you should buy a book or a video on auto trans rebuilding or something, before you start. Maybe work alongside someone who knows what they're doing as they do one, so you can see what's involved.

And please, don't ever use gasoline to clean enormous parts like that. It will take literally gallons to get it cleaned up that way, which you'll then have to dispose of somehow, and then afterwards, you probably will have to depend on your nearest surviving relatives to tell us all why it was a bad idea and of course to nominate you for your well-earned Darwin award.

Just FYI, when I shadetree an auto trans, I use the quarter car wash, followed by compressed air and spray can carb cleaner in all the passages, for the case and such parts as that; carburetor cleaner followed by lacquer thinner for the valve body; and diesel fuel followed by lacquer thinner or spray carb cleaner for the hard parts. And, I don't tackle one if it's all full of varnish or metal shavings or burnt gunk; that's just asking for trouble. I'll go to the buzzard and get another core instead, just because I detest the idea of spending all that time and money pulling it, cleaning it up, rebuilding it, and putting it back in, only to have it malfunction for some piece of trash lodging in some orifice somewhere. I try to start out with as pristine a core as possible, to minimize the chances for error. And of course I always use a fresh torque converter unless I know for absolutely certain that the one I have is not contaminated with anything (very rare indeed...).

 

Probably worth stating that cleaning the core as sofaking mentions is a part of the rebuilding process. There's no way to clean it independently of a rebuild, nor is they really any reason to.

 

First off, I never said anything about taking it apart, I have a friend who fills his transmission with Gasoline, lets it sit, then emptys the pan and runs some new fluid through it to clean the gasoline out, i never said anything about cleaning the outside, I never said anything about taking it apart, it was a simple question that you just blew way out of proportion

 

That still doesn't make it a good idea.

 

thats why i asked, wasnt expecting a damn lecture on the subject, last time i just changed filter and fluid the tranny started slipping so bad i had to replace it, hence wanting to clean out the one i have now I believe that the detergents in the new fluid ate away at the crap in the old one which made it slip

 

Nope, doesn't work like that.

You can't "clean" the inside of a transmission while it's assembled, least of all with gasoline. Whoever told you that, whatever else they tell you, do the exact opposite. Especially if they actually do that. All that will end up happening is that whatever gook has accumulated inside of it will end up in places it doesn't need to be; and then you'll have a transmission that's an explosion hazard.

If your transmission started slipping when you changed the fluid, then it most likely would have started slipping anyway, the fluid change had nothing to do with it. I can assure you that dosing it with gasoline wouldn't have made any difference.

We don't have to answer your questions, you know. You can kill yourself, or trash your car, or whatever, it really won't make that much difference to us. We might be sad for a few moments at you or your car's passing, that's about all. After all, our cars work fine. Without any gasoline in the transmission, thank you very much.

Anybody that thinks you can do a transmission good by filling it with gasoline, needs a lecture; and then some.

 

Once again, you wasted your time, i didnt say i was going to do it to try and fix anything, when its gone, its gone... you didnt answer any of my questions, my question was already answered without your post you just thought you would put in your two cents and go in depth when neither me nor anyone else really cared what you had to say

 

OK, so don't bother asking for help, because no one will be interested in helping you out, since you're just going to act like a little kid when you don't hear what you want to hear, and then go do whatever you want to do anyway.

Have a wonderful day! (somewhere else?)