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  1. Matt69olds

    Replacing turn signal switch in 75 High Sierra

    If you’re comfortable with removing the steering wheel, once that’s off you need to buy or rent a lock plate depressor. I’m sure you can find a dozen YouTube videos, while it’s not difficult it does take a little patience. Be gentle with the snap ring that retains the lock plate, it’s pretty...
  2. Matt69olds

    Rally wheel colors?

    Crap, I forgot I started this thread!! Right now the truck is kinda Frankensteined, the front is the factory brown. The bed is a darker brown that the newer Chevy trucks use.
  3. Matt69olds

    Is this part of the evap system?

    That plugs into the cruise servo.
  4. Matt69olds

    Any explicit help on removing AC components and keeping heat?

    That’s all that’s needed. Technically, the air comes from the cowl area, goes down to the blower motor, the motor forces air thru the rectangular box, and then the various doors direct air thru the heater core, and to the various vents/outlets. You will still need the vacuum line and vacuum...
  5. Matt69olds

    Rally wheel colors?

    Decisions Decisions! I’m trying to decide what color to paint the rally wheels on my 81 GMC. I had originally planned to just go back with the factory Argent silver, but my son suggested black. I immediately dismissed his thoughts as foolish and juvenile, but now I’m reconsidering. I’d hate to...
  6. Matt69olds

    700r4 slipping in cold weather

    What did the spacer plate look like? Anytime I have a 700 or 4L60E apart, I plan on replacing the plate. The check balls beat the plate pretty badly, sometimes they get do worn out the ball actually gets stuck in the plate. If it still slips, it’s going to get worse. As nick suggested, a...
  7. Matt69olds

    Firewall Plug Pin Identification

    Series 59 male terminals. American Autowire carries them, I think the Electrical Depot and Mosier has them as well. Those are both main power feeds from the heavy red wires that go down to the starter. inspect your headlight plugs, series 59 female are in those sockets. Now would be the time...
  8. Matt69olds

    Need help with my 700r4 TTC wiring harness

    This is the method I used to wire the TCC on my 81 GMC. The only difference, I used a time delay relay I bought from Amazon. It was about 15 bucks, and has a 10 second delay. https://www.hotrod.com/how-to/hot-rod-rescue-lockup-700-r4-torque-converter-without-computer/ If you use a standard...
  9. Matt69olds

    Speedo with trip odometer?

    So I need to narrow my search to a 88-89 suburban with trip odometer? That shouldn’t be hard to find!! The smart, quick, and easy thing to do would be to just get a replacement speedo that works and is quiet. What fun would that be??
  10. Matt69olds

    Speedo with trip odometer?

    I don’t normally drive my truck in the winter, but I needed to today. While the engine started instantly in the 8 degree weather, the rest of the truck wasn’t happy! Problem #1: the blower motor screams when it’s cold. Fortunately, that didn’t last long. Problem number 2: the speedometer...
  11. Matt69olds

    Power window stuck halfway

    You’re the exception to the rule. The same rule that says fuel pumps never fail when the tank is empty, only immediately after filling the tank.
  12. Matt69olds

    Power window stuck halfway

    Try some “Percussive Maintenance” otherwise known as giving the door panel a good hard smack. Sometimes the brushes in the motor stick, resulting in a less than ideal connection. If hitting the door fixes it, plan on replacing the motor soon. Power windows NEVER fail to open, they always fail...
  13. Matt69olds

    Delco 2700 ETR Cassette player.

    I listed 75, make an offer. As I mentioned, I’ll never use it.
  14. Matt69olds

    Delco 2700 ETR Cassette player.

    Well crap, for some reason I get a message saying the file is too large to post. If anyone is interested, I’ll email a short video of the radio playing.
  15. Matt69olds

    Delco 2700 ETR Cassette player.

    I finally got the plugs needed to test this radio. I removed it from my 81 GMC probably 25 years ago, as I suspected the cassette deck needs work. The radio plays, but the display and the sound comes and goes. I suspect it has more than a few bad solder joints. The tape deck will load, but not...
  16. Matt69olds

    TH400 trans service

    I don’t have a part number, but the shiny tan gaskets that comes with the TransStar overhaul kits work well. If the pan is flat and installed dry, it takes a rubber mallet the break the seal.
  17. Matt69olds

    Old school garage door opener remote

    Anybody in readerland have a junk old school large single button style garage door opener remote? I’m looking for one to install in my son’s 92 Yukon overhead console. My plan is to gut the remote with the exception of the activation switch, and extend wires from the switch to a remote to the...
  18. Matt69olds

    Transgo kit 1&2 vs SK 400

    Nick is a valuable asset to the transmission category of this forum. Lose the attitude and pay attention, you might learn something. I agree, if the transmission is out on the bench, I wouldn’t pay a dime for a shift kit in a 400. You can do the exact same thing (only better) during an...
  19. Matt69olds

    My 700r4 changes too early ?

    Before doing anything, make sure the throttle opens all the way from the drivers seat. Make sure linkage flex, floormats, or something else is preventing the throttle from opening all the way. Have a helper sit in the drivers seat, with the engine off (duh!) have him floor it while you look...
  20. Matt69olds

    Distributor with limiter

    I had one of the MSD ignition modules in my 455 powered 87 Cutlass, I was not impressed. While the car always ran, I always felt it didn’t run as well as it should have. My suspicions were confirmed when I sold the car to my brother in law, he promptly gutted it to basically turn it into a...
  21. Matt69olds

    No accessories power

    Do all the accessories work normally with the ignition key in run? If so, you can rule out fusible links and fuses and most of the wiring. More than likely, the ignition SWITCH (not the lock cylinder) is out of adjustment. The switch is located on top of the steering column. You will need to...
  22. Matt69olds

    Alt Replacement Options? A bit confused.

    The 78 and 94 amp internally regulated Delco alternators are cheap and easy to find. The 105 and 115 amp CS series alternators are just as common and almost as cheap. In my opinion, you would have to have a serious sound system or other equipment to need more charging system than 105 amps in...
  23. Matt69olds

    Advice on Transmission Fluid Change for 1980 C10

    Any GOOD engineer would design a product with routine maintenance in mind. A good engineer knows the importance of maintenance. Without a doubt, the bean counters vetoed the drain plug!! Bean counters play an important part in manufacturing, but I think they have way too much power.
  24. Matt69olds

    How many bolts hold the transmission on and where?

    If you’re absolutely sure all 6 bellhousing bolts are removed and the trans still won’t come off the back of the engine, more than likely the dowel pins are corroded in the trans bellhousing. Fisk them with penetrating oil and apply some heat. Work slowly so you don’t crack the case. You don’t...
  25. Matt69olds

    Advice on Transmission Fluid Change for 1980 C10

    Yes, your pan has a drain plug. HydraMatic stopped installing drain plugs in the early 70s as a cost cutting move, so more than likely the pan or transmission has been swapped. Possible leak spots: the transmission pan, dipstick tube or o-ring, kickdown cable seal, speedo cable seal, the oring...

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