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  1. Matt69olds

    700r4 problems

    In theory it should go to first in fist gear and shift as you move the lever. I’ll be honest, I have never tried it in a 700. I have done several poor man manual valve body’s with 350/400 transmissions, so the theory is sound. I’d try to drive it a little aggressively, and see if it will...
  2. Matt69olds

    700r4 problems

    Will it back up? If not, I bet you will find it has no overdrive either. If you have no reverse, 2nd, or 4th, most likely the drive shell is broken. Fairly common issue. The Sonnax drive shell is about 125 bucks. It does require transmission removal, and almost complete disassembly. However, if...
  3. Matt69olds

    No brake, running, reverse nor tail lights! Help!

    If I remember correctly, the taillight harness feed is the smallest of the connectors at the firewall electrical connector. Since you said basically nothing works at the back of the truck, start there. Turn on the headlights, use a test light to backprobe the brown wire. Hopefully you have...
  4. Matt69olds

    Switches

    With a truck that old, and lots of previous owners and modifications, who knows what it was for? For all you know, whatever the switch controlled might be long gone. If you really want to know, carefully trave each wire until you find what it’s connected to. The problem with that approach is...
  5. Matt69olds

    Getting rid of old gas

    Either use it for washing greasy parts, or weed killer.
  6. Matt69olds

    Voltage Drop

    First things first, do a simple voltage drop test. Put the POSITIVE probe of your meter on the charge stud of the alternator. Put the NEGATIVE probe on the POSITIVE post of the battery. Start the engine, turn on anything electrical. Read your meter, whatever the meter reads is the amount of...
  7. Matt69olds

    Lokar Case Mount Shifter

    That looks like what was in the S-10. I had a B&M mega shifter in a 85 cutlass, it worked pretty well. That’s the limit of my experience with B&M. Hurst makes kick ass shifter. It’s hard to beat a Quarter stick.
  8. Matt69olds

    1984 4L80E conversion what parts?

    Ok, the 675hp/715 torque numbers change things, I’ll revise my statement!! With that kind of power, but once, cry once, put a 4L80 in it. For the money it’s going to cost to build a 4L60 to handle that power you could use a 4L80 and have money left over. You can supposedly build a 700 to...
  9. Matt69olds

    Lokar Case Mount Shifter

    If the shifter you’re talking about has the sheetmetal bracket that uses the round holes on the side of the case, and 2 extension housing bolts, use something else!!! I did a sbc/4L60 swap on a 99 S-10, the owner bought that shifter. I didn’t like it at all. Very vague as to what gear it’s...
  10. Matt69olds

    1984 4L80E conversion what parts?

    I know nothing about transfer cases, so I can’t help there. A 700 and a 4L60E are the same length. To the best of my knowledge, all the 4x4 output shafts have the same spline. I don’t know for a fact if there are different length shafts for different transfer cases. I do know corvettes use a...
  11. Matt69olds

    4L60e Torque Converter in a Bind

    The rule of thumb is 1/8 to 3/16 inch of converter pullout. In other words, with the converter buried in the pump as far as it will go, you should have 1/8-3/16 gap between the mounting tabs and the flexplate. You can usually get away with a little more than 3/16, but ideally you should use some...
  12. Matt69olds

    Increased Cooling with Electric Fan and Electric Water Pump

    Make sure ALL the factory baffles/shrouding is around the radiator and core support. Make sure the shroud fits tight up against the radiator. Any airflow that can go around the radiator instead of thru it is wasted air. Before wasting too much time and money on this, make sure it’s actually...
  13. Matt69olds

    700R4 Drive Gear looks green?

    Beat me to it!!
  14. Matt69olds

    4L60e Torque Converter in a Bind

    Next time, slowly tighten the bellhousing bolts, stopping every few turn to make sure the converter spins freely. Anytime the converter locks or binds, you need to stop and find out why.
  15. Matt69olds

    4L60e Torque Converter in a Bind

    Don’t start it, it’s almost a certainty the converter slipped out of the pump while installing it. The pump rotor is junk. Right now all you will need is a rotor, start it you will need a pump, converter and most likely a complete overhaul to get the shrapnel out.
  16. Matt69olds

    Spark plug color

    Have you tried going leaner on the pump shot? Just a thought. I’m sure there are ways to tailor the accelerator pump to almost any engine.
  17. Matt69olds

    Whats you gas mileage on your squarebody truck?

    I wouldn’t call 16 stupid good, but for a big block truck I think that’s pretty respectable. My dad is almost 75, he drives like a typical 75 year old, he has gotten 17 before. It’s a stock 71 455, 3.08 gears and a TH350C trans.
  18. 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.
  19. Matt69olds

    Whats you gas mileage on your squarebody truck?

    A electric powered Oldsmobile?! Blasphemy!!!!!
  20. 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.
  21. 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...
  22. 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...
  23. Matt69olds

    1985 Chevrolet C10 Cruise Control Help

    Read this: https://www.gmsquarebody.com/threads/cruise-control-troubleshooting-and-info.4586/
  24. 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.
  25. 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...

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