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  1. Matt69olds

    TH 350 shift issues

    Since the last 350 trans was built in the early 80s, you’re probably not going to find a new one. The best you can probably hope for is a remanufactured valve body.
  2. Matt69olds

    Whats you gas mileage on your squarebody truck?

    A electric powered Oldsmobile?! Blasphemy!!!!!
  3. Matt69olds

    1985 Chevrolet C10 Cruise Control Help

    I’m sure the climate control has its own check valve on the vacuum tank. Without the vacuum tank, every time vacuum falls off during acceleration, your cruise would stop working, and your air conditioning would start coming out the defrost vents.
  4. Matt69olds

    Spark plug color

    I suggested disconnecting the advance for 2 reasons. Number one: to make sure a broken wire on the pickup coil wasn’t causing your stumble, and just to eliminate the advance calibration from the variables. Let’s say you have an advance canister that added a lot of timing with little vacuum...
  5. Matt69olds

    Spark plug color

    Give the engine what it wants, not what you think it needs!! To set cruise AFR, pick a long stretch of smooth road, ideally on a typical weather day. Drive the truck, pay attention to how it drives. Then go one step leaner on the jet/metering rod or (if you’re smart and have a Q-Jet!!!) turn in...
  6. Matt69olds

    1985 Chevrolet C10 Cruise Control Help

    Read this: https://www.gmsquarebody.com/threads/cruise-control-troubleshooting-and-info.4586/
  7. Matt69olds

    1985 Chevrolet C10 Cruise Control Help

    There should be a check valve and a 3rd vacuum hose that goes to the vacuum storage tank.
  8. Matt69olds

    TH 350 shift issues

    If it’s not making the 2-3 shift once it’s warmed up, why do they say no problem?? Seems to me that’s a pretty obvious concern. With the engine cold, pull on the kickdown cable a few times. Pull it enough times you have a good idea of what it feels like. Next time it acts funny, pull the...
  9. Matt69olds

    Question about dash speaker hookup

    Tear the connector body off of old junk Delco speakers, solder the new wires onto those connectors. Plug them into the factory connectors, cheap, no hack install.
  10. Matt69olds

    700r4 quick, stacked shifting

    What’s this geometry kit? You can’t cobble the TV cable together, it has to be right. Too many people think as long as the cable it tight at WOT, it’s good. While that is partially true, since the trans only spends a tiny percentage of its life at WOT (unless the drivers is a teenager!) the...
  11. Matt69olds

    Can you run a 700r4 WITHOUT electrical connection?

    That’s a thermal switch. It’s designed to automatically lock the converter if the trans overheats. Not all 700 use one.
  12. Matt69olds

    No power to gauges, no headlights, no speedometer, and no reverse lights

    Get a 12 volt test light, ground it to a known good ground. Verify the light and ground is good before going any further. Turn on the ignition, check for power on both sides of the gauges fuse. No power, or power on only one side of the fuse will determine the next step. Do the taillights...
  13. Matt69olds

    Charge an extra battery

    I have the battery on my trailer wired thru the 7 blade trailer plug, into a 10 gauge wire protected by a 20 amp fuse. My trailer sometimes sits for months, so the battery will be low when I use it. The truck has never failed to charge it, and it’s been wired like this for the last 10 years...
  14. Matt69olds

    TV Adjustment

    Step one, make sure the throttle opens all the way with the gas pedal. Sometimes linkage flex, floor mats, etc will prevent the throttle from opening all the way. Next, make sure the TV cable throttle travel maxes out at WOT. If so, take it out for a test drive. You might need to adjust the...
  15. Matt69olds

    Looking for recomendations for transmission change

    If the trans is built right, I wouldn’t hesitate to run a 700 behind a big block. There is zero reason a 700 wouldn’t live behind a stout small block. The BIGGEST killer of a 700 is the TV cable. It HAS to be right, close isny good enough. While it’s true the TV cable travel needs to be maxed...
  16. Matt69olds

    Calibrating speedometer.

    They are color coded, but unless they are new gears it’s best to count teeth. They tend to discolor after 30 years in trans fluid.
  17. Matt69olds

    Vacuum advance adjustment

    Read this: https://www.jegs.com/installationinstructions/200/270/270-99600-1.pdf What you’re suppose to do is find the base/mechanical advance that the e gone likes, and thenn move on to the vacuum advance.
  18. Matt69olds

    Vacuum advance adjustment

    Read this: https://www.460ford.com/threads/timing-vacuum-advance-101-good-article-by-gm-engineer.117504/ The 34-36* rule of thumb is good for max power at WOT, you can get away with a lot more timing at cruise. Your vacuum advance canister might be fine, or you might need to tweak it a little...
  19. Matt69olds

    4L80E Rebuild Recommendation

    I have bought lots of stuff from Jake. His stuff it top shelf quality. Extreme Automatics is another good place to deal with. In all honesty, 700hp is nothing to a 4L80. Use Jakes calibration kit, pay attention to the clearances, it will live a long time at that power level.
  20. Matt69olds

    1979 Big 10 Engine & Transmission Upgrade

    A 7.28 1/8 mile is 11:30s in the 1/4, I’d say you hit your mid 11s goal pretty easy.
  21. Matt69olds

    95 Chevy Caprice transmission quirks... suggestions?

    If it’s a quality refurbished valve body, it should have all the updates done to it. I guess it depends on who you get the valvebody from. In either case, be sure to get the plate.
  22. Matt69olds

    95 Chevy Caprice transmission quirks... suggestions?

    What’s fluid look like? It definitely sounds like valves on the valvebody are sticky. As long as the transmission isn’t slipping, you might be able to fix it with some valve body work. Order one of these 2 shift kits. The SK kit is what a lot of shops call the Jr kit. The more expensive kit...
  23. Matt69olds

    Opinions please on possible use for zinc oil additive

    Magnetic drain plug?? Try 5W30, maybe that will help the start up noise.
  24. Matt69olds

    speedo

    https://www.tciauto.com/speedometer-gear-calculator Or this
  25. Matt69olds

    700R4 Speedo Issue

    https://www.tciauto.com/speedometer-gear-calculator

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