1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Is my transmission going out?

Discussion in 'Tech Discussion' started by thecantaloupeman, Nov 8, 2019.

  1. talltidefan

    talltidefan Junior Member

    Age:
    55
    Posts:
    6
    Likes Received:
    1
    Joined:
    Jun 8, 2019
    Location:
    US
    First Name:
    Butch
    Truck Year:
    86
    Truck Model:
    K5 Silverado
    Engine Size:
    305
    I had these symptoms, and it was my alternator. My voltage meter was going nuts when I would gave it throttle, and motor just kind of fluttered.

    Talltidefan
     
  2. Matt69olds

    Matt69olds Full Access Member

    Posts:
    536
    Likes Received:
    472
    Joined:
    Jan 8, 2018
    Location:
    Central Indiana
    First Name:
    Matt
    Truck Year:
    81
    Truck Model:
    GMC 1/2 ton
    Engine Size:
    455 Olds
    Drop the transmission pan, hopefully you won’t find a bunch of crud.

    One thought that I had, the later 400 transmissions used plastic pistons in the valve body. The earlier models used aluminum. If the piston breaks, it can allow fluid from one circuit to leak into another, causing clutches to either not apply as the should (circuit leaks causing low pressure) or hydraulic pressure leaking into circuits when it shouldn’t (reverse oil leaking past the accumulator piston into 2nd clutch oil) The trans can’t go backwards and be in 2nd gear at the same time, causing your bind up condition. Just a thought
     
    talltidefan likes this.
  3. thecantaloupeman

    thecantaloupeman Full Access Member

    Age:
    18
    Posts:
    365
    Likes Received:
    88
    Joined:
    May 14, 2019
    Location:
    US
    First Name:
    Dawson
    Truck Year:
    1978
    Truck Model:
    C20 Silverado Camper Special
    Engine Size:
    350
    Yeah I am wondering if my gas ran out and my gauge was way off/not functioning. I filled it up on the 18th of november and couldve sworn I only drove it a few times, but I could be wrong. I guess I'll find out tomorrow. If thats what it is I'm just gonna have them do a full electrical inspection because there are many electrical problems atm and I wanted to have that done anyway.
     
  4. 80BrownK10

    80BrownK10 Full Access Member

    Posts:
    336
    Likes Received:
    192
    Joined:
    Oct 22, 2019
    Location:
    Greenwood, SC
    First Name:
    Nate
    Truck Year:
    1980
    Truck Model:
    K10
    Engine Size:
    350
    So your not even sure if you didn't run out of gas????

    These things not running right in the city you might be getting 8 mpg so it doesn't take long to burn through that fuel with a 16 gallon tank!

    I get 10mpg. It's not a daily driver and it only takes a few times driving it to use all the fuel up In a tank.
     
    Red Rex likes this.
  5. thecantaloupeman

    thecantaloupeman Full Access Member

    Age:
    18
    Posts:
    365
    Likes Received:
    88
    Joined:
    May 14, 2019
    Location:
    US
    First Name:
    Dawson
    Truck Year:
    1978
    Truck Model:
    C20 Silverado Camper Special
    Engine Size:
    350
    Well I went to the shop with a few gallons of gas and before filling it up I attempted to start it and it started right up. It was parked on a bit of a hill so I don't know if that has anything to do with it, but It doesn't seem like I ran out of gas anymore. I thought my gas gauge fixed itself because it had been slowly going down as I drive like it should. When it was broken it was past the "F" which it isn't now.

    I am hoping I didn't screw up the distributor because the night before, I made sparks when my work light touched a wire near the brake master cylinder. As far as I know that's all that happened, because it started and ran for a while after that and all the electronics worked too. But on top of that a bit of water was slowly dripping onto the distributor from the small amount of melting snow left on the hood. I don't know if any of this could be contributing or not, but I'm throwing it out there.

    I know the shop should be able to tell me the issue, but if I can get some opinions beforehand and narrow down some of the clues I might be able to save some money since they need a starting point. Especially now that it appears to be an intermittent problem I think it's going to be difficult.
     

Share This Page