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Synthetic verus Conventional ATF

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Old 03-23-2008, 02:26 AM
  #16  
Bill Ball
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OK, David, let us know whether or not the Redline helps the cold 1-2 shift. Of course, it could be that any fluid change would help that. When was the last time the fluid was changed?
Old 03-23-2008, 10:32 AM
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dr bob
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This thread leads us to a question about how often folks change their ATF. I've learned over the years that driving style affects trans fluid life at least as much as it affects engine oil, and maybe more. I'm in the gentle-driver category and follow the factory recommendation about 30k change intervals. Folks with supercharged cars or doing a lot of track days change more often? How many only remember when it starts to shift "funny"?
Old 03-24-2008, 03:24 AM
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Emickelsen
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You're all wrong. Put in 4 qts of synthetic, and 2 qts of conventional. Works great in the engine.











Sorry, had to.

This thread leads us to a question about how often folks change their ATF. I've learned over the years that driving style affects trans fluid life at least as much as it affects engine oil, and maybe more. I'm in the gentle-driver category and follow the factory recommendation about 30k change intervals. Folks with supercharged cars or doing a lot of track days change more often? How many only remember when it starts to shift "funny"?

Very interesting point, and i agree. For me, it has been about three times a year. But that's only because i've been fighting a terribly bad leaking tranny (caused by many things). However, i am quite confident I fixed all that today (via project 645.29a-22r). I'm keeping my fingers crossed.
Old 03-24-2008, 07:31 AM
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According to the documentation I got with the car, the trans was serviced in January 2000 at 64,955 miles.

The car currently has 83,500 miles on it.

I think an ATF and filter service will make the cold shift issue go away.
Old 03-24-2008, 10:46 AM
  #20  
RyanPerrella
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Originally Posted by cold_beer839
According to the documentation I got with the car, the trans was serviced in January 2000 at 64,955 miles.

The car currently has 83,500 miles on it.

I think an ATF and filter service will make the cold shift issue go away.
Well your fluid may only have 20,000 miles on it, but its now more than 8 years old. The conventional stuff breaks down, a synthetic is much more robust in this regard.

I don't own an auto, IMHO 8 year old fluid is something i would actually get out of the car as quickly as you can. Even replacing with whatever dino type ATF you like should be beneficial to the car.
Old 03-24-2008, 07:24 PM
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I am working through the car now. Just got it a few weeks ago.

Changed oil and power steering fluid. Also did TB-WP job and replaced thermostat and coolant.

After the trans service I plan on doing complete brake job including drilled rotors and replacing the brake fluid.

The car's PO did very little maintenance on the car.

It just takes some money and time to work through these cars after a neglectful PO.

To say the less, the car was very glad to see me.
Old 03-24-2008, 08:03 PM
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RyanPerrella
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Originally Posted by cold_beer839

To say the less, the car was very glad to see me.
Although i doubt the car likes your wife much after she tore the front spoiler off.

Good luck, your on the right track, i bet your brake fluid looks plain EVIL!
Old 03-24-2008, 08:39 PM
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Well, it is kinda of scared of her now.

But the fat lip is all better now, thanks to $15 of all new stainless hardware.

PO must have tore it off at some point and put it back on with the loose hardware rolling around in the kitchen junk drawer.
Old 03-25-2008, 12:16 AM
  #24  
Hilton
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Originally Posted by cold_beer839
I have heard that using synthetic ATF in a higher mileage auto trans will cause shifting problems.
Then, on the other hand, I have been told that it will make shifting better.
You wouldn't have this issue with a superior 5-speed

Oh wait.. we use ATF too, in the steering rack. And auto's use diff oil.. so I guess we're even.. this time.

Until next time, Danger Mouse!



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