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  1. Matt69olds

    th400

    As long as it’s sealed up, I wouldn’t think it would rust.
  2. Matt69olds

    Rebuild th400 or 4l80e?

    Turn the piston upside down, see if it will fit over the pin. Or remove the sealing ring and try to install it. If it still won’t fit, its more than likely there is a burr or some other imperfection that is keeping the piston from fitting over the pin.
  3. Matt69olds

    Remove 4L60E

    If you drop and drain the pan, there will be very little fluid (if any) that will come out of the extension housing. Same thing with the cooler lines.
  4. Matt69olds

    350turbo out 700r4 in expected cost?

    What he said!! ^^^^ Too many people think as long as the tv cable is tight at WOT, then all is good. While that is partially true, it’s the other 95% of the throttle opening that will cause damage. If the cable is too lose at part throttle, then you will get mushy slip/slide type shifts. It...
  5. Matt69olds

    Alt Replacement Options? A bit confused.

    People run one wire alternators for one of 2 reasons: because they don’t understand how the charging system works, and are too stubborn to learn, or because they don’t understand the benefits of just repairing the system GM designed into their vehicles. Losing the remote voltage sense is one...
  6. Matt69olds

    A/C Question

    The A6 is VERY reliable, other than the front seal is designed to leak. As long as the have oil in them, they are just about indestructible. The A6 was so good, Harrison sold A/C components to ford, rolls Royce, jaguar, and a few other outside companies. The GM A/C systems of the late 50s to...
  7. Matt69olds

    Ac unit 84 cab.

    GM made millions of these trucks with A/C, I bet if your patient you can find a complete system. Ideally, find a system that is still charged and functional. When you swap the parts to your truck, replace every O-Ring, the orifice tube, evacuate and recharge.
  8. Matt69olds

    Please Help I'm Stuck!

    Cruise control on these later trucks like yours is a seperate add on harness. If I remember correctly, the cruise control module is clipped to a bracket near the gas pedal, the cruise servo bolts to the back of the intake, there is a connector that plugs into the speed sensor need the...
  9. Matt69olds

    Rochester Quadrajet Woes

    True, unfortunately today’s gas is much different than what came out of the pumps when these cars were new. Meaning some calibration changes are needed to compensate.
  10. Matt69olds

    Rochester Quadrajet Woes

    Yep, other than idle speed and mixture, that’s as far as most people will go with tuning. Most people don’t have any jets, no float bowl gaskets, squirters, or pump cams. Most of the same people who think their Holley carb is tuned have no clue what I just said means.
  11. Matt69olds

    700r4 tv cable adjustment

    I stand corrected, it’s called the TransGo system correction kit. It’s pretty involved, but they do work. I had to use one when I put the 700 in my truck, the cop car transmission core I used didn’t work very well when I first installed it. https://res.cloudinary.com/transgo/wbiss/sk/SK700.pdf
  12. Matt69olds

    700r4 tv cable adjustment

    As long as it goes into each gear with a solid thud (no slipping/sliding greasy, slide into gear) shifting too early won’t really hurt anything. There are probably hundreds of different spring/valves/govenor combinations HydraMatic used to get the shift points right for each application...
  13. Matt69olds

    First real drive! Not tragic but not good. I think I need carb advice.

    Rochester continually improved the Q-Jet design right up until it was discontinued. The “best” cores are from the mid to late 70s. Better quality casting, externally APT, better chokes, and some of the big block cores were rated at 800cfm. The reason the later cores get a bad reputation is...
  14. Matt69olds

    I would really like a turbo 400 in my truck

    I have a gear vender in my Olds, if I was looking for overdrive today I’d go 4L80 without hesitation. I bought the gear vender used about 15 years ago. At that time, the 4L80 stuff was much more expensive. Compare prices, you could do a 4L80 conversion much cheaper and have thr added bonus...
  15. Matt69olds

    Rochester Quadrajet Woes

    Bingo!! Exactly my point, the people who say Q-Jets are junk are either too lazy to study them, too stubborn to learn, or too stupid to understand them. GM sold millions of vehicles with Q-Jets, every one of them was expected to start and run with drama or fuss, regardless of the environment...
  16. Matt69olds

    Th350 not shifting

    Who did the rebuild? Before tearing into it, I’d get with the builder if possible. If that’s not an option, make sure the vacuum supply to the modulator is good. No vacuum= very late shifts. If the vacuum to the modulator is good, make sure the kickdown cable is free to move. You should be...
  17. Matt69olds

    Rochester Quadrajet Woes

    No doubt the previous owner was a member of the “Q-Jets are junk” group. He clearly had no idea how a Q-Jet works, especially on the secondary side. Cliffs Q-Jet can help you with the parts you need.
  18. Matt69olds

    350 tbi running too cold

    I put a piece of cardboard between the radiator and condenser on my Ram. The diesel engines hold almost 7 gallons of coolant if I remember correctly, it takes a LONG time to heat up, and when it’s really cold the temp cycles as you describe. Block off about half of the radiator, see what...
  19. Matt69olds

    Cleaning Fuel Injectors

    If it ain’t broke, don’t fix it. I don’t have much confidence in the injector cleaner in a can. Anyone who has tried to remove carbon deposits from valves with a wire wheel knows how difficult that can be. If a wire wheel on a grinder takes a while to remove carbon, what good will cleaner in a...
  20. Matt69olds

    700r4 Manual Valve Body

    I didn’t know anyone offered manual valve body for a 700. I knew TransGo offered a kit to convert a stock valve body. A manual valve body without engine braking has to be driven the right way. I’m not sure if a 700 is like a 400/350 trans, but if you like your feet attached to your legs, DO...
  21. Matt69olds

    First real drive! Not tragic but not good. I think I need carb advice.

    Before messing with the carb, make sure the dwell, ignition timing, and the rest of the ignition is in good working order. You will never get the carb right if the ignition is less than perfect. If the carb does need work, be smart and keep the Q-Jet. Get with Cliff Ruggles at Cliffs Q-Jets...
  22. Matt69olds

    Tool for adjusting idle

    Or remove the file screws and cut a slot in them. I used a dremel tool with the thick cut off wheel, it made a slot just big enough for a pocket screwdriver.
  23. Matt69olds

    Rebuild th400 or 4l80e?

    You can swap in a 4l80 far cheaper than that, and gain the lockup converter.
  24. Matt69olds

    Oil Pressure Drops After High RPM

    Cut the oil filter open. If it’s clean of metallic debris, put a mechanical gauge on it to verify the oil pressure. If it’s still low, use 10W30 or 10W40. Shell Rotella 15w40 will definitely raise the idle pressure. Having said that, thicker oil is a band aid. Something is worn to cause the...
  25. Matt69olds

    A/C Question

    If the truck is still driveable, take somewhere to have the system evacuated. That will answer 2 big questions: does the system still have refrigerate (meaning no big leaks) and if in fact it still still charged that means your issue is electrical. You’re probably going to find the system low...

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