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  1. ROCK HARVEY

    Locking Hubs: Seeking Reviews

    I’ve had the stainless mile marker hubs on my truck for two years now. They’re holding up fine but I’ve only used them a handful of times. If anyone else has positive or negative experience with more heavy use I’d like to hear it.
  2. ROCK HARVEY

    ZF Tailhousing swap

    Haha I saw the bot posts but not the age of the posts before it. I think it’s safe to assume that tailhousing is no longer for sale! One of these days I’ll fab up a support for the transfer case to take the weight off the tailhousing. For now I just make sure to replace the transmission mount...
  3. ROCK HARVEY

    ZF Tailhousing swap

    I would definitely snag that 4x4 tailhousing if you can. I can testify that they do crack:
  4. ROCK HARVEY

    Sudden loss of oil

    Here’s the video that I saw about Valvoline R&P. There are more out there, but this is the first one that I saw about it.
  5. ROCK HARVEY

    Sudden loss of oil

    I don’t think they make it in 15w40 yet, but Valvoline makes a new oil called “restore and protect” that is making waves among oil nerds for its ability to clean sludge and deposits. They do make a 10w30 though which would work in the wintertime. If you’re already adding oil maybe something like...
  6. ROCK HARVEY

    ZF5 Problem Jumping out of 4th

    This is what I was getting at when I was asking how it could pop out of gear with only the pilot bearing loose. I would try to wiggle the input shaft and see if there is any play. Side note: I have the 460 gears in my zf5, but I swapped the gearset into a diesel case.
  7. ROCK HARVEY

    ZF5 Problem Jumping out of 4th

    The white plastic things in this kit are what I’m talking about: https://a.co/d/icOz4bx
  8. ROCK HARVEY

    ZF5 Problem Jumping out of 4th

    When the transmission was rebuilt, do you know if they replaced the plastic shifter guides/bushings? They’re not included in the rebuild kits I’ve seen, you have to buy them separately which means a transmission shop might skip replacing them.
  9. ROCK HARVEY

    ZF5 Problem Jumping out of 4th

    I’m not surprised at the worn pilot bearing, but unless the input shaft bearing also has play how would the trans be popping out of gear?
  10. ROCK HARVEY

    Blow by and Low Mileage Tare Down Questions

    First off, this sucks and I’m sorry it happened to you. I would check the cylinders to verify roundness and lack of taper, starting with #7. If the machine shop used on old worn out boring bar, it might be the right diameter at the top but a lot bigger at the bottom. That’s just the first thing...
  11. ROCK HARVEY

    Tachometer Troubleshooting

    I bought this one but I can’t comment on quality because I haven’t installed it yet: https://a.co/d/66KSFuk For a tach signal, I’ve heard you can use the stator output on the alternator. Maybe you could try that before switching to a different tachometer.
  12. ROCK HARVEY

    Batteries read 12.7 but slow cranks

    My bet is you need new positive and negative battery cables. Remember, if your voltage is dropping on the way to the starter due to bad connections or cables, the amps are going up due to Ohms law. You might even see the connection on the starter glowing red if it’s bad enough. Lots of starters...
  13. ROCK HARVEY

    IP question

    I have 2 suggestions: You might try checking whether your fuel tank is venting properly. When you start having fueling issues, unscrew the gas cap and listen for a “whooshing” sound. Or try loosening the gas cap when the issues show up and see if they disappear. If your tank’s not venting you...
  14. ROCK HARVEY

    How many of you guys are running a water separator?

    I didn’t realize the 6.9s and the 7.3s take different fuel filters. I know you can buy the 7.3 filter housing for cheap on Amazon, so you could always delete the firewall-mounted water separator and run a 7.3 style filter that has a built-in water separator like the Wix 33617.
  15. ROCK HARVEY

    New age headlights

    Wow those lights blow my stock headlights out of the water, even with my relays and extra-bright bulbs. This really makes me want to attempt a DIY Aussie conversion
  16. ROCK HARVEY

    7.3idi Rebuild Cylinder Wear

    Related question for the group: What are people paying to sleeve a block these days?
  17. ROCK HARVEY

    7.3 IDI excessive oil usage

    I can vouch for the diesel purge for cleaning the IP. I had an issue where my truck would die when I let off the gas after accelerating or just revving the engine. I read that this tends to happen when your metering valve gets gummed up in the IP. I ordered two cans of diesel purge off Amazon...
  18. ROCK HARVEY

    Clean and test injectors?

    I think I used a shotgun bore brush in a cordless drill to clean the bores on mine. Ever since I had an injector seize in the bore due to carbon buildup, I over-torque them on install to make sure that copper washer seals. It’s not fun when you unscrew and injector and only the top half comes...
  19. ROCK HARVEY

    IDI marine engine questions

    The cam was one of the things I thought would be different, but it had the international part number for a truck cam stamped into the end of it (1804449C1)
  20. ROCK HARVEY

    IDI marine engine questions

    I thought I’d circle back to this in case somebody searches for info in the future. Keep in mind this boat motor is an NA motor from 1988, so later/turbo motors might be a totally different story. But in my case the heads and all of the engine internals were standard International parts. The IP...
  21. ROCK HARVEY

    Vacuum pump belt tension

    The service manual I have is from International not Ford, so I guess it makes sense that they list an air compressor for air brakes rather than a vacuum pump for vacuum-assist brakes. I didn’t notice that, and I can’t say for sure that the belt deflection would be the same on the vacuum pump...
  22. ROCK HARVEY

    Vacuum pump belt tension

    Here’s the page on v belt tension from the service manual I have:
  23. ROCK HARVEY

    IP Return Line Fitting

    Isn’t that fitting a standard1/4 or 1/8 ORB ( o-ring boss)? If it is, you can buy a replacement from any hydraulic parts place: https://www.hydraulicsdirect.com/hose-ends/barbed-push-lock/beaded-hose-ends-steel/4601
  24. ROCK HARVEY

    Beware of crappy magnetic oil drain plugs

    I almost always stick one of those super strong rare earth magnets to the end of my regular drain plugs, or somewhere else that makes sense. Like on my rear diff I just stick it to the gear cover in the bottom corner. Those things are so strong you can hardly pry them off with your fingernail...
  25. ROCK HARVEY

    CDD injection line issues

    I sent them an email this morning telling them my measurements and asking whether I got a bad set or whether they are all this way. In the meantime I re-installed my old lines except for #1 since it was the correct length in the new set and my old one was messed up. This has been a major pain...

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