Help! transmission problems!

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DrewQ45
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Car: 1990 Infiniti Q45

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Get the cheapest ATF you can find. Makes no diff since you're going to get it chemically flushed soon (like tomorrow). Be sure they are adding BG chemicals and not just exchanging fluid.

Don't forget to repeat the process (filter flush or new) 1-2 days after. What you're seeing there is just from the filter. There is still more of that stuff floating around in the greater parts of the transmission.


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Jesda
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Wow, 93k on an original transmission. It was due to fail 15-40k earlier.

[Sometimes I feel like I'm on a Chrysler forum.]

qship96
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with that much debris trapped in the filter,my guess is that the transmission is toast

96Qowner
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Jesda wrote:Wow, 93k on an original transmission. It was due to fail 15-40k earlier.

[Sometimes I feel like I'm on a Chrysler forum.]
I have 191,000 on mine. *shrug*

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92Q45guy
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qship96 wrote:with that much debris trapped in the filter,my guess is that the transmission is toast
We will see tommorrow. I'm waiting for my friend to pick me up(Q is my only car) Today I will get some fluid. Then I 'll be back tommorrow and fill her up. I only drove it half a mile when it started slipping. Then I had it flatbedded. I know I wont sleep tonight

DrewQ45
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92Q45guy wrote: I only drove it half a mile when it started slipping.
The slipping you experienced was actually lockup. It's the end result of a long cycle. Your transmission has been starved of fluid flow for a long time. The more it clogged, the more it overheated and the more clutch material shore off, a vicous cycle. Once the fluid became stagnant (today) due to complete blockage, there was no longer any pressure in the system hence the "neutral'. After your 2nd filter clean, it will feel like it's shifting like new providing you didn't do too much damage. Only time will tell.

qship96
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the old chicken/egg debate

the worn/damaged/failing parts clogged the filter vs the clogged filter caused the wearing/damage/failed parts

I tend to believe the first scenario,as the filter remains servicable until the transmission is so worn as to shed enough material to clog iit.,it is all too late by then to expect new fluid/filter to rescue the worn out hard parts.

maxnix
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1995 Infiniti Q45t
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qship96 wrote:.....as the filter remains servicable until the transmission is so worn as to shed enough material to clog it..
Actually, this is not true as there is always debris floating around in the fluid, even if it can't be seen with the unaided eye. This debris invariably becomes lodged within the screen mesh if not on the surface. Hence, just like brake fluid, power steeering fluid, ATF and differential fluid, there is no way to deteremine if it is "servicable" until it fails as the deterioration in performance is gradual over time. Exactly why the filter has to be replaced with every pan drop, and all those fluids are replaced before they are discernably bad.

Once any componenet is known to be bad or failed, the damage has already occurred at an accelerated rate. This is the main lesson of the Q45tech gold standard service regimen.

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92Q45guy
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Well today I added the fluid, Lowered the car and went for a spin. Success! The car drives amazing! shifts on fly and is much smoother. I'm so happy! I'm going to drive it for a couple of days and drop the pan again and clean the filter. Then get a BG chemical flush. One other thing I noticed I had about 6 1/2 quarts of fluid in my drain pan. I know I did some degree of damage to the transmission, but it works so I'm happy. Thanks everyone for your help............And dont go by what the service records say!

DrewQ45
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92Q45guy wrote:Well today I added the fluid, Lowered the car and went for a spin. Success! The car drives amazing! shifts on fly and is much smoother. I'm so happy! I'm going to drive it for a couple of days and drop the pan again and clean the filter. Then get a BG chemical flush. One other thing I noticed I had about 6 1/2 quarts of fluid in my drain pan. I know I did some degree of damage to the transmission, but it works so I'm happy. Thanks everyone for your help............And dont go by what the service records say!
BG Flush first then clean the filter. Unless you plan on doing it twice?

Flushing a filter is a good way to tell the condition of your transmission even if you don't plan on reusing the filter. The story is in the bucket!

Don't flog it till you're done with all this and be sure to add a friction modifier. It needs all the help it can get.
Modified by DrewQ45 at 12:28 PM 3/30/2007

maxnix
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And don't confuse a chemical BG Quick Clean (get the correct one for the transmission) flush with a mechanical fluid exchange.

And don't forget to add the the auxiliary ATF cooler, and add an auxiliary ATF filter like the later G50. And use all new parts!

As to the service record, one has to contact the service manager at the performing dealer and inquire as to the precise meaning of the terms - i.e., what is the actual procedure employed and how is it implemented?

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92Q45guy
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maxnix wrote:And don't confuse a chemical BG Quick Clean (get the correct one for the transmission) flush with a mechanical fluid exchange.

And don't forget to add the the auxiliary ATF cooler, and add an auxiliary ATF filter like the later G50. And use all new parts!

As to the service record, one has to contact the service manager at the performing dealer and inquire as to the precise meaning of the terms - i.e., what is the actual procedure employed and how is it implemented?
I've already added a transmission cooler when I did my chain guides . I mounted it between the condenser and the radiator. So it's not seeing hot air after the radiator. As for the owner before me

maxnix
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Hey, don't blame him, he only trusted his dealer unquestiongly.

Most owners don't want to pay any more than the absolute minimum to keep their car rolling downhill.

Oh, and consider back flushing your cooler.
Modified by maxnix at 12:36 PM 3/30/2007

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92Q45guy
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I guess I see your point. But, Looking at the service records it shows that from 92-00 was all infinity dealers working on it. And from 00-06 was someone else. Not a dealer. If I didn't work on cars and was taking it to some average mechanic, I would be watching them like a hawk! "Hey, why are you not dropping the transmission pan" "I want a new filter with that new fluid"

StarPD
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92Q45guy,I like your sig photo.I have a 10-1/2 year old black Dobie, my third. Previous two were reds. He is the sweetest, most obedient, and best mannered dog I and friends, relatives and visitors have ever seen. He is fiercely protective of my wife, but defers to me if I'm around when things go bump in the night.

Dobies are irrefutably the smartest and best all-around family dogs there are.

(Sorry for the thread hijack, but I had to compliment you on your choice of freiids)

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92Q45guy
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StarPD wrote:92Q45guy,I like your sig photo.I have a 10-1/2 year old black Dobie, my third. Previous two were reds. He is the sweetest, most obedient, and best mannered dog I and friends, relatives and visitors have ever seen. He is fiercely protective of my wife, but defers to me if I'm around when things go bump in the night.

Dobies are irrefutably the smartest and best all-around family dogs there are.

(Sorry for the thread hijack, but I had to compliment you on your choice of freiids)
Thanks! Dobermans are great family dogs. They have a bad rap from movies, WWII, ETC. This is my second dobie. He also is very sweet and well trained..........I pitty the fool that tries to get into my house or back yard. He's only 1 1/2 years so he's got another 1/2 a year of growing left in him. He has about a 45 word vocabulary right now! And he loves going for rides in the Q!

DrewQ45
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I'm curious to know where you got the O-ring to replace the broken one. Dealer or Auto parts store?

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92Q45guy
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I have a kit. Comes with 600 o-rings and 15 different sizes. I think it's a dorman kit.


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