Ok, so I really need to change my AT fluid.
A little background: I have a very messed up truck, previous owner was cheap moron, etc. If you've seen the thread about my t-case you already got the idea.
Fluid in t-case was not ATF, but some brown stuff I couldn't recognize, pic here. I was afraid that it went to AT through the seals, but fluid on the dipstick and inside tranny casing (when I removed the TC) was more or less clear and somewhat pink. Its winter now, and tranny started to behave very badly when cold - it won't shift 1-2 until 3-4 seconds of 3000+ rpm, and shifts were very hard. It got better after warm-up, and then worked completely okay (with normal operating temperature). ATF level was a bit high according to dipstick, so I decided to drain it a bit (I have a drain bolt there), and see if it helps.
Now check out what's was inside:
I assume that unknown brown oil from the t-case eventually did find its way to AT. I couldn't leave the truck at the garage at the moment, so I drained the pan (about 6 quarts came out), and filled tranny with fresh Dexron III. So about half of the fluid is changed now, and tranny performs better then ever (no cold shift issues whatsoever). But I want to flush all this $hit out.
What should I do? I was thinking of disconnecting AT cooler hose (I have aftermarket ATF cooler), putting its output line to ATF canister, and starting the engine. AT pump should suck new fluid in there, and push old one out. Then I'll drain the pan and change the filter. Can I mess something by doing this? Is there a better way?
I'm aware of possible slipping issues afterwards, but my truck doesn't have a turbo yet, so this shouldn't be a big problem. But I don't want it to suddenly die.
A little background: I have a very messed up truck, previous owner was cheap moron, etc. If you've seen the thread about my t-case you already got the idea.
Fluid in t-case was not ATF, but some brown stuff I couldn't recognize, pic here. I was afraid that it went to AT through the seals, but fluid on the dipstick and inside tranny casing (when I removed the TC) was more or less clear and somewhat pink. Its winter now, and tranny started to behave very badly when cold - it won't shift 1-2 until 3-4 seconds of 3000+ rpm, and shifts were very hard. It got better after warm-up, and then worked completely okay (with normal operating temperature). ATF level was a bit high according to dipstick, so I decided to drain it a bit (I have a drain bolt there), and see if it helps.Now check out what's was inside:
I assume that unknown brown oil from the t-case eventually did find its way to AT. I couldn't leave the truck at the garage at the moment, so I drained the pan (about 6 quarts came out), and filled tranny with fresh Dexron III. So about half of the fluid is changed now, and tranny performs better then ever (no cold shift issues whatsoever). But I want to flush all this $hit out.
What should I do? I was thinking of disconnecting AT cooler hose (I have aftermarket ATF cooler), putting its output line to ATF canister, and starting the engine. AT pump should suck new fluid in there, and push old one out. Then I'll drain the pan and change the filter. Can I mess something by doing this? Is there a better way?
I'm aware of possible slipping issues afterwards, but my truck doesn't have a turbo yet, so this shouldn't be a big problem. But I don't want it to suddenly die.
