I know there's been a lot of debate on the Flush. With folks saying not to do them on high mileage tranny's because it may block passages.

Here's my take and I am by no means an expert. The fluid is being exhanged by the pump in the tranny. It is under no more pressure than normal. How does this dislodge anymore gunk than normal operation? Now I can understand if you put a cleaner in and it partially dissolves the sludge and then it becomes stuck, but just doing a fluid exchange whith a T-Tec or other type machine should not cause an issue with blockage.

That being said. If a tranny has been neglected for 90K, wouldn't that be the real cause of failure and not the fluid exchange? I would agree that if it has never been touched you'd definately want to drop the pan and change the filter. But wouldn't you also want to do an exchange to totally clean out all the old luid?

Are my assumptions correct? This board is the best place I've found for information and tips!!!


John

 

John,

I consider myself an automatic transmission expert, and I agree with you.

 

Mark,

I've seen several of your posts. Thanks for the reply. I just wondered if anyone could validate my assumptions. It just seems like a sound method to me (Fluid Exchange Machinery)

Have a good one,

John

 

My 98 with 46k just got it's second fluid change.

My wifes 98 mustang just got it's first fluid flush at 45k and boy it really needed it!

From now on I plan on doing it more frequently since it's cheap insurance ($50). Replacement trannys are 2k+

 

My only concern about flushing is that unless all of the old fluid is removed prior to injecting the new, then some will be mixed in the pan. So how do you know that you got a complete change? Besides, at least for the 2wd, changing it your self is really pretty easy and I claim no more messy than changing the engine oil. That oil filter is a real #@$$%%.

 

bought my truck w/57k on it. I called the dealer, no record of a tranny service.

Took it to the same transmission shop I,ve used for the last 20 years (next door neighbor)and had an expert look at it.
Had them change front diff transfercase transmission and rear end fluids tightened up the bands and looked for debris in the pan put on new filter all for 113.70

He said it all looked good and he'd see me in another 30k

Cheap insurance and now I feel all clean and happy.

 

How did he tighten the bands? They are not adjustable.

 

Hmmmm, I think I smell a Chrysler product ...................

 

Sorry, my mistake not being an expert just a new owner I was not aware the bands were not adjustable.

When I took my pick-up in, he went over their standard items included in there service, not being specific by make or model

Whatever the case, these guys know what there doing and I dont claim to!

Transmission shops in general have a bad reputation, but I'm lucky enough to have an honest one where I live.

Thanks for the education guys

 

Mark, you dont let anything by...

 

I got a question related to this:



I'm going to get a flush/change and I am 600 miles from 80K. I don't know if it's been changed or not (I've been owner for two months). Is it risky at 80k?


Thanks

 

i have 214k on my tranny and no problems, original fluid. i wanna flush it but, i may just wait then get a whole new tranny.



97 f150 4x4

 

Not if you just get a flush. If they run flush chemicals through the transmission all bets are off.

 

I think there is some confusion on this topic, my understanding is the main reason to "service" the transmission is to replace the filter and clean the magnet that catches the metal chips. In doing that you will be replacing some fluid about 1/4 of it. The main purpose is not replacing the fluid, it is not like changing your motor oil. Just my 2 cents.

 

In my opinion it's much more important to change the fluid than to change the filter and clean the pan.

The filter isn't going to plug unless the transmission self destructs. If the transmission is working fine the filter will last the life of the transmission.

The gunk stuck on the bottom of the pan is just that - stuck on the bottom of the pan. It isn't going anywhere.