Hello Keith -
We are ready to install the rebuilt cast-iron Torqueflite in my late father's 1957 Chrysler 300C. I have purchased (but not yet added) some Valvoline Premium Type F fluid (standard petroleum base). Although my usage will actually be very gentle and not require a high-performance fluid, I would definitely consider a synthetic fluid IF I could be pretty sure of two things: First, unless specifically modified, early versions of synthetic fluids (engine oil, transmission fluids, etc.,) often did not contain adequate seal-swelling agents, so they tended to leak, often prodigiously. Question: Do you or any of your acquaintances have personal experience with any brand of synthetic Type F fluid, and have their results been leak-free for at least a year? Second: Both Royal Purple and Redline offer their synthetic Type F fluids "For Racing Purposes Only" -- RP even says it is NOT for standard automatic transmissions. Redline makes a similar admonition, just not quite so specific, so I am loathe to use either of those well-respected names in an application they advise against. Redline says their fluid has NO friction modifiers in it, whereas I thought "Type F" implied a certain "package" of friction modifiers, so I don't know what to make of their statements. The Redline advisors say they have no advice to offer regarding my proposed use, and hence would not recommend their product without specific experience. However, ALL the synthetic manufacturers talk about greatly improved wear characteristics, extended service life, etc.
I see that ATI (makers of some extreme high-performance transmissions and torque converters, etc.) offers a full-synthetic Type F fluid (available through Summit, JEGS, Amazon, etc.) They say it is for "Racing, street rod and high-performance applications". Their tech rep could only say that they developed the fluid for Joe Gibbs Racing, and they've had excellent results in dragsters and Funny Cars, with no reports of undue leakage or other performance or compatibility issues. I would like to give that stuff a try, especially if anyone in the Club has favorable experience with it. Or alternatively, I would like to hear any reports of unfavorable experience with ANY of the full-synthetic Type F fluids. It's not prohibitively expensive, either, at $98 + shipping for 12 quarts from Amazon.
If I don't hear any adverse comments, I may just go ahead and be the first "guinea pig"!
Las Cruces, NM
1957 300C convertible (almost ready to roll, again!)
CC: agmoon@xxxxxxxxx; chrysler300@xxxxxxxxxxxxxxx
Date: Sun, 15 May 2016 14:06:59 -0400
Subject: Re: [Chrysler300] You Cars Tranny Fluids
A few years ago there was a pretty lengthy thread on our forum about which ATFs were both suitable and available for our Torqueflites. The original ATF in the cast iron Torqueflite was Type A, but that is no longer being made and offered on the market. I has been conclusively agreed that Type F works very well as a substitute for Type A, and furthermore that most other ATFs, like Dexron and Mercon, will induce disappointing (and sometimes strange) performance characteristics.
ATF is the fluid with the very most critical specifications of any in your car. Getting it wrong can mess up the transmission functions, and even wear it out prematurely. So yes, Go with only Type F in your Torqueflite.
And your question about synthetic vs. petroleum base? You're probably not going to stress your ATF by racing or pulling a trailer anymore, but it is true that synthetic is superior to petroleum-based in many performance characteristics, and inferior in none. So you'll probably be fine using standard Type F, and you'd be finer yet using Redline or Royal Purple synthetic Type F.
On Sun, May 15, 2016 at 12:16 PM, 'David Schwandt' finsruskw@xxxxxxxxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
Posted by: Ray Melton <rfmelton@xxxxxxx>
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