Tranny Flush

[airjordan2k8]

alright im getting my transmission fluid flushed today and was wondering what all do i need to tell them to do??? Thanks

[NATEHAWK]

dont do it

[airjordan2k8]

dont do it
why is that?? ive never had it done before and car currently has 103,720k

[RF Overlord]

If they have half a clue, they'll KNOW what to do...if not, then I wouldn't let them experiment on MY car.

Make sure they change the filter, too.

[RF Overlord]

dont do itYeah, why not?

[ChiTownMaraud3r]

Does your oil look or smell burnt?

[NATEHAWK]

Doing a tranny flush is the quickest way to kill a tranny. Your pushing metal particles through the tranny....Thats a big problem....

[ctrlraven]

Flush = bad.

Full Fluid Exchange w/new fliter= good.

With the 4R70W transmission you should let a Ford dealer do a full fluid change as their system is not a force flush. It will allow the trans pump itself to cycle the fluid.

[airjordan2k8]

Flush = bad.

Full Fluid Exchange w/new fliter= good.

With the 4R70W transmission you should let a Ford dealer do a full fluid change as their system is not a force flush. It will allow the trans pump itself to cycle the fluid.
oh yea thats exactly where im goin a ford dealership. do i need to tell them to change the filter too or should they already know?

[ChiTownMaraud3r]

Flush = bad.

Full Fluid Exchange w/new fliter= good.

With the 4R70W transmission you should let a Ford dealer do a full fluid change as their system is not a force flush. It will allow the trans pump itself to cycle the fluid.

I thought the flush processes were the same? It is the cold fluid that pushes the hot fluid out of the car without mixing?

I would agree on just dropping the pan, and topping the fluid off with that mileage.

[airjordan2k8]

Does your oil look or smell burnt?
i honestly havent even looked at it just thought it would be time to do it and it kinda shifts a lil too hard than it normally does..

[NATEHAWK]

I would say if its not broke dont try to fix it man....My CVPI has 202k no flush change or anything..running great knock on wood

[tbone]

I'm sure he means a full fluid exchange with a machine, not a high pressure "flush".

[airjordan2k8]

I'm sure he means a full fluid exchange with a machine, not a high pressure "flush".
yea my bad that's what i meant exchange..

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[RF Overlord]

I have yet to see anyone show me a picture of a "flush" being done that uses "high-pressure" or one that "back-flushes" anything.

A flush and a fluid exchange are the same thing. The machine uses a double-ended cylinder where fresh fluid is introduced at one end. The machine is hooked up to the cooler lines and uses the transmission's own pump to force the old fluid into the other end, and a sealed piston pushes the fresh fluid back in. Everything flows in the correct direction, and no additional pressure is produced.

If a transmission fails after a fluid change, then it was on its last legs and was going to fail soon anyway. It's doing people a dis-service to tell them not to have the fluid exchanged.

[tbone]

I have yet to see anyone show me a picture of a "flush" being done that uses "high-pressure" or one that "back-flushes" anything.

A flush and a fluid exchange are the same thing. The machine uses a double-ended cylinder where fresh fluid is introduced at one end. The machine is hooked up to the cooler lines and uses the transmission's own pump to force the old fluid into the other end, and a sealed piston pushes the fresh fluid back in. Everything flows in the correct direction, and no additional pressure is produced.

If a transmission fails after a fluid change, then it was on its last legs and was going to fail soon anyway. It's doing people a dis-service to tell them not to have the fluid exchanged.

Correctomundo.

[NATEHAWK]

I have yet to see anyone show me a picture of a "flush" being done that uses "high-pressure" or one that "back-flushes" anything.

A flush and a fluid exchange are the same thing. The machine uses a double-ended cylinder where fresh fluid is introduced at one end. The machine is hooked up to the cooler lines and uses the transmission's own pump to force the old fluid into the other end, and a sealed piston pushes the fresh fluid back in. Everything flows in the correct direction, and no additional pressure is produced.

If a transmission fails after a fluid change, then it was on its last legs and was going to fail soon anyway. It's doing people a dis-service to tell them not to have the fluid exchanged.

Just my opinion! Like I said before if its not broke dont fix it. Any good mechanic knows to leave well enough alone when it comes to tranny flushes.

[tbone]

Well, you don't leave your motor oil in until the engine seizes up. Same for a diff, transfer case, cooling system, brake hydraulics, etc. Fluids become contaminated and lose their lubricating properties, etc.

If your tranny can't take a flush, it's garbage like Overlord said. Sooner or later, the fluid has to be changed.

[NATEHAWK]

This is why I rarely post anymore. People can't take good advice....You can drop the pan change the filter and disconnect the line up front going to the cooler and let it pump out there. You'll get just a good amount all out like that with out this "Flush" you think that's worth nothing but messing up a tranny with mileage. Maybe a flush is cool on a new tranny or a car with less miles but he's at 104k I would never recommend someone to something that has caused early tranny failure. I'm here to help guys and give positive advice not send their tranny to a early grave.

[tbone]

I wouldn't take it personal. We've all heard both sides......

[DOOM]

I would say if its not broke dont try to fix it man....My CVPI has 202k no flush change or anything..running great knock on wood

This!

My first Vic had 242,000 miles on it! No flush.

My 05 Vic has 161,128 miles on it as I type this. No flush.

[NATEHAWK]

This!

My first Vic had 242,000 miles on it! No flush.

My 05 Vic has 161,128 miles on it as I type this. No flush.

The common here NO FLUSH

[RF Overlord]

This is why I rarely post anymore. People can't take good advice....I'm here to help guys and give positive advice not send their tranny to a early grave.The problem is that what you gave is not good advice.

I agree that if the fluid is all burnt and stinky, it might be better to do a gradual change by doing a few pan drops, but if the fluid is that bad then the transmission has been neglected/abused and is more likely to fail regardless.

Condition, not mileage, determines whether a fluid exchange is warranted.

[whitey]

I regularly drain my pan and add new fluid. I never completely did a fluid exchange though. Every 20k

[tbone]

This!

My first Vic had 242,000 miles on it! No flush.

My 05 Vic has 161,128 miles on it as I type this. No flush.

I'll bet you did regular pan drops and filter changes, no?

[NATEHAWK]

I'll bet you did regular pan drops and filter changes, no?

Nope. I haven't....point we both are making. A pan drop is fine just stay away from any flushy flushy stuff. The gain is not worth your tranny going south

[ctrlraven]

I've had several fluid exchanges done on mine and every 3rd or 4th oil change I drain 5qts of trans fluid and re-fill. I'm at 190k+ miles with zero issues with my trans.

http://www.youtube.com/watch?v=BfrWzwic2Sg
BfrWzwic2Sg


I've always looked at a flush as flushing the system with the vehicle off and a compressor old style flush machine, it forces old fluid in which can dislodge any built up varnish inside the transmission.

A fluid exchange uses a newer style compressor that meters the input of "old" fluid being cycled in via the vehicle running and allowing the transmission itself to move the old fluid out while new fluid is being pulled in.

I'm sure if flushing was so horrible SmokdMercRauder (Nuru) wouldn't have actually done my last one when I had my J-mod done a few years ago.

If you don't know the service history on the transmission or it's never been serviced before and has high mileage (usually 75k miles or higher) then most places won't even do it because it could cause an issue or the failure of the transmission. So it really depends on how it was maintained in the past as to whether a flush should be done or not.

[tbone]

Nope. I haven't....point we both are making. A pan drop is fine just stay away from any flushy flushy stuff. The gain is not worth your tranny going south


I was asking Doom.

[tbone]

I've had several fluid exchanges done on mine and every 3rd or 4th oil change I drain 5qts of trans fluid and re-fill. I'm at 190k+ miles with zero issues with my trans.

http://www.youtube.com/watch?v=BfrWzwic2Sg
BfrWzwic2Sg


I've always looked at a flush as flushing the system with the vehicle off and a compressor old style flush machine, it forces old fluid in which can dislodge any built up varnish inside the transmission.

A fluid exchange uses a newer style compressor that meters the input of "old" fluid being cycled in via the vehicle running and allowing the transmission itself to move the old fluid out while new fluid is being pulled in.

I'm sure if flushing was so horrible SmokdMercRauder (Nuru) wouldn't have actually done my last one when I had my J-mod done a few years ago.

If you don't know the service history on the transmission or it's never been serviced before and has high mileage (usually 75k miles or higher) then most places won't even do it because it could cause an issue or the failure of the transmission. So it really depends on how it was maintained in the past as to whether a flush should be done or not.

Not a huge fan of his, but he's dead on here. :beer:

[tbone]

If you don't do regular trans pan drops and fluid changes, it's like changing your motor oil roughly 2 quarts out of 6 at a time = 1/3. 16 quarts tranny fluid vs 5 quarts drop + filter = roughly 1/3 change of fluid.

So you do a pan drop and filter on a 100k plus car...... What does it accomplish? Dirty fluid with lots of contaminants still there to clog up your brand new filter.

You would have to change your motor oil in this fashion probably 3-4 times to finally see perfectly clean oil......

[TJCOX]

Don't forget to install a pan drain kit.