90 Camry Transmission Problem?

90 Camry - 250K - had a rebuilt auto transmission installed 4 years ago. After driving high speeds on the highway and then being stopped at a light when I hit the accelerator it skips a few times and doesn't seem to go into gear. This is an automatic transmission - Any thoughts on this? I just changed the transmission fluid.
Reply to
90CamryOwner
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did you replace the filter

Reply to
m Ransley

No I haven't replaced the filter in a long time. Could that be causing this. I couldn't figure out how to get to the filter. I will have to take it in to a professional to have this done.

Reply to
90CamryOwner

Gee no filter replacing ? Bad. Thats on a 15000 mile change on " A" schedule. "A" schedule is severe driving, dusty roads, short trips in winter, etc, Alot of city driving can be hard driving. While you are at it do the differential and try Mobil synthetic ATF That also means changing Trans fluid every 15000. I drain mine every 7000 and do filters every 20- 25 . Mobil will improve power and milage. "B" schedule is 30000 miles or 24mo. How long have you waited, is you figure Km or miles. If you do the power steering it takes ATF also.

Reply to
m Ransley

"Mobil (ATF) will improve power and mileage" Really? Pray tell, HOW? I want a recognized reference source. Is the power increase measurable outside of a laboratory?

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- Philip @ Maximum Torque RPM
Reply to
Philip®

Well Phil its my personal experiance on several cars, It reduces friction and whats in a tranny, alot of moving parts. I know youve never tried it , you dont even beleive in synthetic in differentials. Well the good synthetics have a higher shear strength. Did you ever see a test done with one of those bearing stress machines where force is added till the bearing is smoked. I have, my neighbor sells Royal Purple . Well anyway no bs If I just change relatively new ATF , a drain in a camry I feel it shift better I feel Better aceleration and I get Better MPG. Now it doesnt last more than 6000 miles or so I beleive the antifriction additives cook off. But It does work I will guarntee I just did my diff with mobil synthetic ATF well with 91000 Im getting better milage than i ever did before. ever. Try it it wont hurt anything.

Reply to
m Ransley

Ransley: All your "beliefs" (you used the word twice) are bunk in automatics that share the differential and tranmission lubricant. Surely you know that clutches and bands require different friction coefficients from the lubricant than hypoid or bevel or helical cut gears. Then there's the requirements of the oil pump itself ... the designs of which vary. Then you've got tapered roller bearings in a final drive that are not found in an automatic transmission. So I find it odd that you should think a synthetic ATF would be any different in it's performance requirements than conventional ATF. ATF is not exposed to combustion byproducts ... a factor that does give synthetic an advantage over conventional lubricants. If I were to swap your synthetic ATF for conventional without your knowledge, I'll bet you would not notice any performance difference. None.

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- Philip @ Maximum Torque RPM
Reply to
Philip®

Hey Phil You are a Stick in the MUD Go try it dont analize it and quit being an ass hole. My diff and trans take the same ATF . Different resivours , same fluid . Mobil knows alot more than you they spent millions making that Synthetic ATF. Quit second guessing it . Your thoughts are wrong. Do you see toyota warning against it, do you see anyone warning against it. No . You Will See and improvement in shifting , Mpg, and Power due to Friction reducers. I know your reasoning , but it works, Chemistry is anazing isnt it .

Reply to
m Ransley

Lacking substantive technical evidence for his "beliefs" "Ransley" takes my questioning as a personal affront. Pity.

So how does that change ANYTHING I have said regarding lubrication requirements of various components in an automatic transaxle?

Mobil knows alot more than you and does not make the claims you do.

My thoughts on this subject are logical while you're are LACKING and EMOTIONAL. The thing I'm second guessing are your "beliefs" on the subject.

I don't see Toyota endorsing any synthetic product unless it happens to be their own.

Thank you for answering for me. Suggests your closed mindedness on the matter.

Friction reducers.

I used Mobil's synthetic ATF for 15k miles after the first autotransaxle rebuild (185k miles). NONE of the claims you make were in evidence AND there was more "tip-in" whine from the final drive. May I impress on you again that friction reducers are conducive to soft shifts. Friction coefficients must be within a tolerance otherwise the ATF is not suitable for the application. Ever wonder why you have different ATFs for various brands of transmissions?

I have yet to see tangible evidence that synthetic ATF is worth the high price in a street car that has a heat exchanger. But hey ... when a customer -believes- then why not make the product and charge what the market will bear! LOL

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- Philip @ Maximum Torque RPM
Reply to
Philip®

how many manufacturers endorse any synthetic of any type, only a few, and they are proven. It works for me, thats good enough, and i feel and see a milage difference. Maybe a new trans is affected differently. My shifts are more solid, downshifting is realy noticable, and quicker. yes , my experiance its faster. perhaps its my old transmission, my new caddy didnt benefit the same as the old camry.

Reply to
m Ransley

Synthetic ENGINE lubricants are endorsed by some manufacturers for extended drain intervals. But where is any endorsement of aftermarket synthetic ATF? As I said earlier, there are requirements for the car manufacturer's own ATF (BMW, Mercedes, Toyota T-IV for some examples).

What works for you is a belief without SAE evidence. Now, I'll retract that statement WHEN you provide side by side laboratory testing that shows synthetic ATF to be of benefit to a street automobile. Again ... considering all automatics have a heat exchanger in the radiator, there is a short amount of time that a synthetic (assumed to have a more stabile viscosity) would be thinner than a conventional ATF, thereby contributing slightly to better fuel mileage. Thin lubricant is NOT desireable for bevel and hypoid gears nor roller or ball bearing race longevity. A matter of degree, obviously.

You are GUESSING again.

All subjective. If the synthetic fluid cost $10 per quart, you'd be even more emphatic about the percieved improvements. LOL

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- Philip @ Maximum Torque RPM
Reply to
Philip®

OK,..some transmission faults do appear after the trans has got to full temperature,..I have a Ford V8 which does this ie it wont go into reverse unless I blip the throttle.

opinion only,..you really should see an experienced transmission specialist

The fault appears to be tied up with inadequate oil-pump performance. Oil gets thinner when its hot,...this means a worn or damaged pump cant deliver enough oil (under pressure) to do the job the trans has been instructed to do (via the shifter).

OTOH,..dirty oil-pan filter or a sticking valve -body can produce similar symptoms.

Best to get it looked at byan expert!

Jason

Reply to
Jason James

Fuck your SAE Evidence Philly boy , it works for me so eat shit. Royal purple is apx 10$ , No I dont use it ass wipe.

Reply to
m Ransley

My my my .... you're thin skinned. A little challenge to your belief system and off you go.

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- Philip @ Maximum Torque RPM
Reply to
Philip®

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