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About jeffw

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  1. jeffw

    Engine Brake Volvo D12

    If you start the truck with low air in the tanks, you should also hear the exhaust brake come on as air pressure builds after you start the engine. The Volvos use the exhaust brake to help the engine warm up faster (and stay warm at idle).
  2. jeffw

    Tire Pressures

    We have 17.5"s as well. Starting at 125 we'll see over 150psi on long trips on hot days.
  3. jeffw

    Cruise control revisited

    I would hope the computer diagnostics would be able to say where the brake application is coming from. Has anyone investigated that?
  4. jeffw


    Thanks for sharing. I'm sure it's hard to do, but it's good for us to learn from others, for sure.
  5. jeffw

    780 trans not shifting .

    You should try to pull the codes: https://www.zf.com/usa_canada/media/zfmig_united_states/zfmig_corporate_replacement_parts_1/zfmig_service_portfolio/zfmig_class8/TP01110.pdf
  6. jeffw

    AIR LEAKS-I give up!

    Keep in mind the engine brake uses air too. It's a place where you could end up consuming a good amount of air.
  7. jeffw

    HDT Tires

    I've also got Kelly drive tires. They're the side brand of Goodyear. My mechanic uses the on their fleet and has had good luck with them.
  8. jeffw

    Traveling through Ontario Canada

    We've crossed from the 1000 Islands bridge into Ontario on our way to Mosport (Canadian Tire Motorsports Park). We had no issues (but YMMV).
  9. jeffw

    On Board Diagnostics

    Be aware the scangauge has issues with some 2008 (and other years) volvos. When I plugged it in it caused a traction control fault. They said it's a known problem and they can't fix it.
  10. jeffw

    Bobtail mileage

    I get 6.5 towing and 9-10 bobtail on the highway.
  11. jeffw

    Rear Tire Pressure

    I went from 110 to 80psi in the rear (we are dual axle). It made a huge difference in ride comfort, especially over really bad bridge joints. I do have axle weights with the trailer on, and could run as low as 70PSI according to the tire manufacturer's charts but that seems really low so I haven't tried that yet.
  12. jeffw

    How do you know when shocks are shot?

    I just realized I never posted a follow-up. We got 4 new drive tires installed in March. We're not singled, and the shop set all the drive tires to 110 PSI. Dropping the drive tire pressures to 80 totally changed the way the truck absorbs bumps now. It's still not a super smooth ride but it's nearly like a new truck.
  13. Found this today: https://truckyeah.jalopnik.com/we-found-out-if-a-used-big-rig-could-replace-your-picku-1686364410
  14. jeffw

    odd tire wear on Continental HTL2 tire

    I met with the regional Continental Truck Tire rep today. We're off to a good start. He's collected some data and pictures and is going to talk to resources within Continental. One thing he suggested is that the Conti HTR2 might be a better tire for high scrub applications as the HTL2 is focused more on low rolling resistance. He may be able to get me one to try out. For now I'm going to move the HTL2s to the center axle and see how they wear while we figure out the next step.
  15. jeffw

    Freightliner FL70

    I had a FL60 with a 5.9 Cummins (230HP) and a 6-speed manual transmission. It was good, but not enough power (and not enough gears to keep it in the power range). Compared to the Volvo, it was quite a bit louder and less comfortable on the highway. A class-8 truck will be a better ride with more power.