Q45TECH IF YOU'RE ONLINE I NEED YOUR ADVICE PLEASE

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daoracle_sentme
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OKAY I HAVE A 1995 Q45 158,007 MILES ON IT. RUNS FINE AND NO HARD SHIFTING FROM PARK TO NEUTRAL TO DRIVE OR ANYTHING OF THAT NATURE. THING IS IT DOSNT SHIFT OUT OF 2ND GEAR. IT SHIFTS FROM 1ST TO SECOND GEAR FINE BUT THEN THATS IT AND IT DRIVES IN THE GEAR THE ENTIRE TIME. I TOOK IT TO A TRANNY REPAIR SHOP THIS MORNING AND THEY STATED THAT THEY HOOKED IT UP TO THE COMPUTER AND ALL SENSORS WERE WORKING SO ITS AN INTERNAL PROBLEM SO I WOULD NEED A NEW TRANSMISSION. I ASKED ABOUT THE TPS SENSOR IF THEY CHECKED THAT HE SAID IT WOULDVE SHOWED UP ON THE COMPUTER TEST BUT IT DIDNT. SO THEN I ASKED WELL COULD YOU GUYS JUST DRAIN THE FLUID (NOT FLUSH IT) AND REFILL IT WITH NEW FLUID AND HE SAID NO HE WOULDNT DO IT BECAUSE IT WOULD BE A WASTE OF TIME AND MONEY. SO I DROVE HOME (NO MORE HIGHWAYS FOR ME AS I NOW ONY DRIVE 40 MPH OUT OF SHEER FEAR!) THEN I WENT AND CHECKED ON A PART FOR MY OTHER CAR THAT I NEEDED AND ALSO TOD THE MECHANIC THERE ABOUT MY PROBLEM. I ASKED WOULD HE CHANGE THE FLUID TO SEE IF IT WOULD HELP. HE SAID WELL LET HIM LOOK AT THE STICK FIRST. HE STATED THAT YEAH YOUR FLUID IS ALITTLE BROWN BUT IT ISNT BLACK SO YEAH I'LL DO IT BECAUSE IT WOULD HURT IT AT ALL. ONLY REASON HE DIDNT DO IT WAS BECAUSE HE DIDNT HAVE THE TRANSMISSION FILTER KIT FOR THE CAR. SO HE TOLD ME TO GO TO ANOTHER PARTS STORE AND GET THE PARTS AND BRING IT BACK AND HE WOULD DO IT. WHEN I WENT TO THE NEW PARTS STORE THE MECHANIC THERE (MOST MECHANICS HERE ALSO SELL SOME PARTS) WARNED ME ABIUT CHANGING ANYTHING. SO BEFORE HE EVEN LOOKED TO SEE IF HE HAD THE PART HE WANTED TO SEE THE STICK AND HE SAID THE SAME THING. TRANNY FLUID IS ALITTLE BROWN PROBABLY BECAUSE ITS NEVER BEEN CHANGED SO YEAH ITS SAFE TO GO AHEAD AND DO IT. BUT THEY TOO DIDNT HAVE HE PARTS AS WELL.

SO MY QUESTION IS THIS? SHOULD I DRAIN THE FLUID AND PUT NEW FLUID IN, CHANGE THE TPS OR JUST START LOOKING FOR A NEW TRANSMISSION?


Q45tech
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Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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A drain and refill doesn't require a new filter/oring, a pan drop does.

Changing 3-4 quarts usually won't change things but it might give you a clue. If it improves you step up to a BG Machine chemical flush and 90% fluid replacemnt.

Wasting money on a dead horse? Spending a few hundred to make sure before you opt for a few thousand or $3,000 is often wise.

A tranny expert might be a better place to start in that the Pathfinder, J30, Q, 300zx all use similar units................2 different strength units but similar.

qship96
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90% fluid change?

superuber
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158,000 miles and you never changed the fluid? You should be happy it made it that far! What are you complaining about?Get a new tranny and be done with it! Cooler?

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elwesso
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superuber wrote:158,000 miles and you never changed the fluid? You should be happy it made it that far! What are you complaining about?Get a new tranny and be done with it! Cooler?

Q45tech
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Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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90% or 93 or 95% because you never know how much old ATF leaks thru the system internally.....................100% of the ATF doesn't flow thru TC and out the cooler line in a single pass.

Why the BG machine holds 14 quarts to try to get as much of the 11 changed.

I'm being pessimistic at 90%.

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DrewQ45
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Probably time for a new tranny, but you might still have some life left in that abused one. Try flushing the filter as it's surely clogged by now and might be the reason your tranny can't develop enough pressure to shift properly. You've got nothing to lose other than some time and effort. You can search under my ID for the steps.

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goody90q45
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After cleaning the filter and changing the fluid, the large bottle of Lucas Transmission Treatment might be very helpful in this case. It doesn't cost much more than a quart of ATF and will help with slipping and shifting. I know from experience that if ithe tranny's starved for fluid (about 1 1/2 qts. low) it will not shift out of 1st. Good luck.

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Ozzie
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Q45tech wrote:90% or 93 or 95% because you never know how much old ATF leaks thru the system internally.....................100% of the ATF doesn't flow thru TC and out the cooler line in a single pass.

Why the BG machine holds 14 quarts to try to get as much of the 11 changed.

I'm being pessimistic at 90%.
But right on the money.......

Tech is right.... you can't get ALL the old fluid out with a machine flush, but 90% is better than nothing.I also think the 90% guess is being pessimistic, but better to guess at a worst case scenario, so you won't be disappointed if you get 95% of the old fluid out.....

I should get my car flushed again soon........Thanks for the reminder!

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NY94J30
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Q45tech wrote: 90% or 93 or 95% because you never know how much old ATF leaks thru the system internally.....................100% of the ATF doesn't flow thru TC and out the cooler line in a single pass.

Why the BG machine holds 14 quarts to try to get as much of the 11 changed.

I'm being pessimistic at 90%.
That being so, what effect would it have on a synthetic changeover - having > 90% synthetic ATF mixed with < 10% conventional ATF in the transmission?

maxnix
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qship96 wrote:90% fluid change?
Local BG distributor told me 95% - 98%.

maxnix
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1995 Infiniti Q45t
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goody94q45 wrote:After cleaning the filter and changing the fluid, the large bottle of Lucas Transmission Treatment might be very helpful in this case. It doesn't cost much more than a quart of ATF and will help with slipping and shifting. I know from experience that if ithe tranny's starved for fluid (about 1 1/2 qts. low) it will not shift out of 1st. Good luck.
Clogged screen will starve the planetary gears.

Lucas should be avoided at all costs, even if it is free.

qship96
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Q45tech wrote:90% or 93 or 95% because you never know how much old ATF leaks thru the system internally.....................100% of the ATF doesn't flow thru TC and out the cooler line in a single pass.

Why the BG machine holds 14 quarts to try to get as much of the 11 changed.

I'm being pessimistic at 90%.
I guess I did ok then last week by 6 manual drain/refills timed at 2.0 minutes,with 83-85% of the 25,000 mile old redline d4 atf replaced by new d4-and saved the $100+ by skipping the machine

superuber
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qship96 wrote:
I guess I did ok then last week by 6 manual drain/refills timed at 2.0 minutes,with 83-85% of the 25,000 mile old redline d4 atf replaced by new d4-and saved the $100+ by skipping the machine
interesting, more info. please!

96Qowner
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Jesda
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Lucas is quite effective at bringing dead or near-dead JATCO trannies to life, at least for 6-18 months. I've seen it work before my eyes.

Q45tech
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Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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Seal Swellers can be ok if the seals need swelling.

After the steps of pan drain and a flush [near total ATF exchange] BEFORE I replace a tranny I ask the custommer if they want to pay for an exorcization or two.................Heck if in countries where Witch Doctors or religious faith healers are available for a nominal fee.

At some point you have to bite the bullet and replace the AT.

I advise customers that once they spend $300 trying for a miracle they switch gears and apply for a second mortgage and get it fixed properly for the long haul.


maxnix
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Car: 1995 Infiniti Q45
1995 Infiniti Q45t
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qship96 wrote:I guess I did ok then last week by 6 manual drain/refills timed at 2.0 minutes,with 83-85% of the 25,000 mile old redline d4 atf replaced by new d4-and saved the $100+ by skipping the machine
Don't confuse gravity flow with a mechanical exchange under pressure. One works, the other just gets the less broken down fuild out and leaves the worst contaminated fluid and detritus within.

You might have saved money on the short run, but you cost your car transmission life on the long run. If you read Q45tech's posts, you will never find a recommendation to drain and refill for that very reason.

qship96
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maxnix wrote:Don't confuse gravity flow with a mechanical exchange under pressure. One works, the other just gets the less broken down fuild out and leaves the worst contaminated fluid and detritus within.

You might have saved money on the short run, but you cost your car transmission life on the long run. If you read Q45tech's posts, you will never find a recommendation to drain and refill for that very reason.
Brian,are we really going to go through this bullsh*t again? Q45tech IS THE ONE WHO ORIGINALLY POSTED THIS METHOD as an effective way to replace the majority of atf w/o using a machine!

Now,lets blow some holes through your above inaccurate post,shall we?The exchange machine has NO more pressure than the internal transmission pump provides,as it is this pump that circulates the fluid thru the machine,same effect as drain/fill-both methods get the exact same fluid out of the transmission whether clean or dirty,contaminated or not,full of detrious or not-and if you think the drain/fill repeated 6x replacing 80-85% of the old fluid every 25-30k is going to cause the tranny to fail any earlier than by maintaining using the machine method,you are sadly fooling yourself. Using your logic,I am surprised you fill your gas tank every time it gets down to 1/4-all that "old,left over,contaminated,detrious laced gas in that last 1/4 tank is going to cause your new gas to be a diluted,polluted,engine killing serum" You really need to bone up on the laws of dilution. Oh,by the way,my tranny is shifting like new at 190,859 miles with my maintenance plan-followed since day one

maxnix
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1995 Infiniti Q45t
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qship96 wrote:Brian,are we really going to go through this bullsh*t again? Q45tech IS THE ONE WHO ORIGINALLY POSTED THIS METHOD as an effective way to replace the majority of atf w/o using a machine!
You brought it up, not me.

Care to cite the post? He never said it was equivalent to a full mechanical flush.

My memory is not perfect, but I have read all of q45tech's posts and followed the embedded links since the Yahoo boards.

Yup, your bull patties do stink.

qship96
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I posted q45tech`s 2 minute drill post in the online mechanic forum for you


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