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  1. P

    6.9 Superduty

    What brand of pistons?
  2. P

    Marvel Mystery

    Yes, it's pretty much all over. Google something like "Spicer Lubricity test" and it will come up with a 2007 date and likely as a PDF you can download. May the road always be smooth for Arlen Spicer! He paid for a number of scientific tests and presented them on the web. It's now a bit dated...
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    6.9 Superduty

    I can't remember how much of a CC difference the larger piston pockets equate to but depending on how much valve recession your machinist built in, you will be on the low side.... around 20:1. Maybe lower. Could run into starting issues on cold days but since you're in Vegas ( : < ).... You can...
  4. P

    Marvel Mystery

    Have run it by the gallon. "Felt" absolutely no difference. I don't with 2-stroke oil either... naturally... because all it does is add lubricity to the fuel and possibly save the pump from excess wear from ULSD that might nat have been properly treated by the blender. The only product in which...
  5. P

    Coolant: To flush or not?

    Probably can't, not easily anyway, but the difference between tap water and distilled is not huge and, IMO, not worth dumping perfectly good coolant.
  6. P

    Coolant: To flush or not?

    Right on! Why waste good coolant. Just add the SCA and run for a normal interval.
  7. P

    Trans cooler

    Well, that's unfortunate. On to "Plan B," eh?
  8. P

    Trans cooler

    Better job than I could do! May the solder gods be with you!
  9. P

    oil pump changed in the truck

    Did you take a second set of oil pressure readings? If so??? I did my pan in the truck with a C6 and a Banks turbo years ago. A PITA but doable. I don't really recall the details. It was the '90s.
  10. P

    7.3IDI -VS- 7.3Marine IDI

    To which marine engine is the 275 hp being attributed? I have attached the 7.3L IDI brochure for the Star-Powr, which was a brand name of Marine Drive Systems (affiliated with Navistar), both the TDA (Turbo Diesel Aftercooled) and the NA. They were rated at 260 hp crankshaft (per NMMA regs)...
  11. P

    Trans cooler

    Yeah, you need to consider why this might have happened. Hot ATF didn't do it. Heat in an electrical circuit comes from hi impedance (resistance in the circuit) or excess current from a partially grounded circuit. Often the first culprit to look at in any auto electrical problem are grounds...
  12. P

    Question abut atf in fuel filter clean up?

    Two stroke oil has some detergents but it's mostly added for lubrication and it's designed to combust without leaving deposits. That's why it's a pretty good lubricity additive for diesel fuel. As I have said before, ATF DOES NOT have a very robust detergency package (compared to motor oil)...
  13. P

    Trans cooler

    Only if there is a converter drain. I have drilled and tapped converters without a drain for a drain plug but you need to know EXACTLY where to do it.
  14. P

    Question abut atf in fuel filter clean up?

    There are a a dozen reasons why a problem could come and go BESIDES the ATF having fixed it. Obviously, your ego is tied up in being "right." You don't know how to debate facts without getting your bowels in an uproar, or you wouldn't have resorted to deliberately distorting my words. My only...
  15. P

    Trans cooler

    Well, I completely missed the blobs of solder in your first pic. Loose valve body attachments aren't a good thing. Could the blobs of solder come from a melted solenoid, wiring connection or the circuit board? Basically, a tranny shop with doom and gloom you into a teardown over what's in...
  16. P

    Question abut atf in fuel filter clean up?

    Real world test is most assuredly NOT anecdotal , unless you are using "real world" as a synonym for "half-assed," "half-baked" or "it-does-what-I-say-it does-regardless-of-the-facts." The cause and effect of your hand-in-the-grinder example works because it's a simple one: You know a grinder...
  17. P

    Question abut atf in fuel filter clean up?

    Basically, engine oil or ATF would have down the same thing, probably also other types of lubes that didn't have wildly incompatible additives in them. And if you look at the Spicer lubricity test, which I noted above, you will see ATF is WAY down the list as far as diesel fuel lubricity goes...
  18. P

    Question abut atf in fuel filter clean up?

    You guys are demonstrating perfect examples of unsupported anecdotes. You don't know what the original problem was. You don't know how, why or if it was the ATF that cured it. But you are willing die on that anecdotal hill. Not saying that to provoke or anger you, just to encourage you to step...
  19. P

    Trans cooler

    I haven't tested an AFE pan, but we did before and after temp tests on a Mag-Hytec pan on a 4R70 trans it it could consistently knock an average of 15F off the stabilized pan oil temp. Plus it added four quarts to the capacity, a magnetic drain plug and a cast, never-leak pan and a port for a...
  20. P

    Trans cooler

    As far as what's on the magnet, if that's the first change ever or the first change after a rebuild from way in the past, don't worry about it, that's a normal amount. Just shows you the magnet is doing its job. Ditto if it's been a long run on the oil. What oil there is in the pic looks very...
  21. P

    Question abut atf in fuel filter clean up?

    Seafoam seems to be a good cleaner but, as with anything, it only does some good when there some good that needs doing. Therein lies my skepticism of the whole diesel fuel system cleaning thing. How do they get "dirty" beyond particulate contamination and possibly algae? How does "cleaning"...
  22. P

    Question abut atf in fuel filter clean up?

    Glad you chimed in here Mel! A question for you: What in a diesel fuel system needs "cleaning" that a mild detergent like ATF will take off anyway. I can see solid contaminants getting caught in the system but the people I have talked to who are obsessed with cleaning out their fuel system...
  23. P

    Question abut atf in fuel filter clean up?

    The ATF thing is a total waste of time. I know a lot about the formulation of ATF and there is very little detergency in it because AT are a closed system and don't need it (like an engine which has to deal with combustion byproducts). Some ATFs have esters with some detergency qualities but...
  24. P

    AMSoil ATF in ZF?

    Although it is referring to ZF automatics, not necessarily manuals. The ZF 4HP22 automatic, with which I became intimately familiar back in my Range Rover days, called for Dex III which is likely why this oil is compatible. In any case, Ford spec'ed Mercon for it (which was a Group III base oil...
  25. P

    AMSoil ATF in ZF?

    Generally, you would first check what type of fluid is specified for the ZF, or any trans. If it's ATF, you don't want to use a heavier oil like an 80W90, and vice versa. Then you check farther because the friction modifiers (FM) vary considerably in ATF types and sometimes they are...

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