727 Tranny fluid?

[Roadcuda]

I'll be changing my tranny fluid soon and I was wondering what you 727 guys are using now. I found some ATF-4 by Penzoil and Castrol, both at $5.29 a quart. That was about 1-2 bucks higher then most of the other brands, except the Dextron which about a buck more then the ATF-4. So what do you all say? Thanks!

 

[Big John]

The hot tip was always to use Type F (Ford) trans fluid. I heard that right from Bill Hancock, Chryslers performance trans engineer. The Dexron (GM and Chrysler Spec) was formulated to slip more then the Ford type, giving a smoother shift. He used his Mom's Imperial of why you needed a smoother shift.

So... that said, I always used Type F... but its not always available.

I've been going to look at some of the newer synthetics for mine.

 

[69hemibeep]

It handles more heat also :cheers:

 

[Roadcuda]

Thanks guys. What would be the advantage of using a synthetic fluid?

 

[Big John]

I haven't done much research on it yet, but in theory the synthetic shouldn't break down because of temperature and should run cooler.

 

[Big John]

I just started looking around and found this:

http://www.redlineoil.com/pdf/3.pdf

Their racing ATF looks interesting.

 

[Roadcuda]

I just started looking around and found this:

http://www.redlineoil.com/pdf/3.pdf

Their racing ATF looks interesting.

It does look interesting, thanks Big.

 

[ACME A12]

The hot tip was always to use Type F (Ford) trans fluid. I heard that right from Bill Hancock, Chryslers performance trans engineer. The Dexron (GM and Chrysler Spec) was formulated to slip more then the Ford type, giving a smoother shift. He used his Mom's Imperial of why you needed a smoother shift.

So... that said, I always used Type F... but its not always available.

I've been going to look at some of the newer synthetics for mine.

I was once told that the B&M Trick Shift tranny fluid was actually just Type F...

:jester:

 

[Big John]

[quote="Big John":1jf9wywb]The hot tip was always to use Type F (Ford) trans fluid. I heard that right from Bill Hancock, Chryslers performance trans engineer. The Dexron (GM and Chrysler Spec) was formulated to slip more then the Ford type, giving a smoother shift. He used his Mom's Imperial of why you needed a smoother shift.

So... that said, I always used Type F... but its not always available.

I've been going to look at some of the newer synthetics for mine.

I was once told that the B&M Trick Shift tranny fluid was actually just Type F...

:jester:[/quote:1jf9wywb]

I don't know... I do remember being told by someone years ago, I think it was Bill Hancock, not to use the B&M trans fluid. The B&M stuff was blue, so it wasn't just repackaged Type F.

 

[SomeCarGuy]

The 727 isn't very sensitive to what you put in it. I don't think you will see much difference in anything unless you are looking dino versus syn.

 

[Roadcuda]

Before I started the car the other day, I checked the fluids including the tranny. The fluid covered about 4-5 inches on the stick. Once I got the started and checked the fluid again, with it in neutral, and it didn't show on the stick at all. Any ideas what could cause this? If it matters, I do have a deep tranny pan on the car.

 

[Big John]

Before I started the car the other day, I checked the fluids including the tranny. The fluid covered about 4-5 inches on the stick. Once I got the started and checked the fluid again, with it in neutral, and it didn't show on the stick at all. Any ideas what could cause this? If it matters, I do have a deep tranny pan on the car.

When the car is not running, all the trans fluid drains back into the pan making the level high. When its runnning (in neutral) the oil pump in the trans is running and fluid is pushed through the trans and torque convertor and the level goes down.

The trans needs to be at operating temperature to get the true level reading too. My rule of thumb is to get the fluid so it just shows on the dipstick when its cold and then check it when its hot. Don't overfill it... the fluid will get whipped into a froth by the rotating assembly and then the trans won't work correctly because of the air in the fluid.

 

[Roadcuda]

Thanks, John. Another question. The normal capacity is 15 1/2 pints, or 7 1/2 quarts. Is that correct? With the deep pan, how much more would I add? Thanks again.

 

[Big John]

I dunno.. I think its two quarts but I don't remember.

Edit: I just looked at them in the Jeg's catalog. They say an extra quart.

 

[69hemibeep]

Thanks, John. Another question. The normal capacity is 15 1/2 pints, or 7 1/2 quarts. Is that correct? With the deep pan, how much more would I add? Thanks again.

Those are generally two quarts extra but I would check!