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

Pilot Bushing ? for the masses.

Discussion in 'Manual Transmission & Clutch' started by SquareRoot, Jan 4, 2021.

  1. SquareRoot

    SquareRoot Full Access Member

    Posts:
    1,298
    Likes Received:
    1,763
    Joined:
    Mar 18, 2017
    Location:
    Arizona
    First Name:
    Mike
    Truck Year:
    85
    Truck Model:
    K20
    Engine Size:
    350
    Bushing-bearing whatever. What I want to know is under what condition does the input shaft turn at a different speed than the crankshaft? My Goodwrench motor came with a bronze bushing. My Clutch came with a roller bearing.

    What say y'all?
     
  2. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    Any time the clutch is depressed, the input shaft and crank turn at different speeds.As for preference roller or bushing I don't really have one, I've seen both fail and I've seen both last for decades.
     
    Michael Benardo and Vbb199 like this.
  3. Frankenchevy

    Frankenchevy Lying Dog-Faced Pony Soldier

    Posts:
    4,757
    Likes Received:
    4,969
    Joined:
    Jan 3, 2018
    Location:
    USA
    First Name:
    Jeremy
    Truck Year:
    Square
    Truck Model:
    CUCV
    Engine Size:
    Small
    I think the depth that your trans input rides in the pilot is the most important.

    The thing I liked about the McLeod bearing that came with your clutch was the depth front to back. It has that collar that bottoms out on the crank for added input shaft support.

    With the standard pilot bushing, you don’t necessarily drive it all the way into the crank. You’re supposed to check how far the input shaft goes and possibly not press the bushing all the way in to increase support for the input shaft.
     
  4. SquareRoot

    SquareRoot Full Access Member

    Posts:
    1,298
    Likes Received:
    1,763
    Joined:
    Mar 18, 2017
    Location:
    Arizona
    First Name:
    Mike
    Truck Year:
    85
    Truck Model:
    K20
    Engine Size:
    350
    That's kind of what I was thinking. So I'll assume that sitting idle while holding the clutch in causes excessive wear to some degree, the TO bearing and the pilot bushing.
     
    Michael Benardo likes this.
  5. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    Yep. You are supposed to sit at the light in neutral.Its also hard on the thrust bearing
     
    Michael Benardo and SquareRoot like this.
  6. SquareRoot

    SquareRoot Full Access Member

    Posts:
    1,298
    Likes Received:
    1,763
    Joined:
    Mar 18, 2017
    Location:
    Arizona
    First Name:
    Mike
    Truck Year:
    85
    Truck Model:
    K20
    Engine Size:
    350
    @Frankenchevy ,

    I checked that, but decided to leave the factory bushing in the crank. The bushing was flush with the crank flange surface. What surprised me was that there was like 3/8th inch more space behind the bushing. I was surprised the bore was that deep.
     
    Frankenchevy likes this.
  7. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    How did you know what bearing, bushing, and clutch kit he has?
     
    78C10BigTen likes this.
  8. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    Did you not put a new factory bushing in?
     
  9. SquareRoot

    SquareRoot Full Access Member

    Posts:
    1,298
    Likes Received:
    1,763
    Joined:
    Mar 18, 2017
    Location:
    Arizona
    First Name:
    Mike
    Truck Year:
    85
    Truck Model:
    K20
    Engine Size:
    350
    Lol. He's a stalker:hidesbehindsofa:
     
  10. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    LOL. Really I did.

    I was at Wal-Mart I kept seeing this same woman in every aisle I went down I looked at her and said geez ,I go to Wal mart and end up with a stalker. She says it's funny when you say it, when I say it, security takes you out of the building.
     
  11. SquareRoot

    SquareRoot Full Access Member

    Posts:
    1,298
    Likes Received:
    1,763
    Joined:
    Mar 18, 2017
    Location:
    Arizona
    First Name:
    Mike
    Truck Year:
    85
    Truck Model:
    K20
    Engine Size:
    350
    Nope. It's a new crate engine that had an auto in it. The factory bushing was still new. Just a little lube and in went the shaft....input shaft.
     
    Ricko1966 likes this.
  12. Frankenchevy

    Frankenchevy Lying Dog-Faced Pony Soldier

    Posts:
    4,757
    Likes Received:
    4,969
    Joined:
    Jan 3, 2018
    Location:
    USA
    First Name:
    Jeremy
    Truck Year:
    Square
    Truck Model:
    CUCV
    Engine Size:
    Small
    He ordered the same one I got. HE is the stalker!
     
    SquareRoot and Ricko1966 like this.
  13. Frankenchevy

    Frankenchevy Lying Dog-Faced Pony Soldier

    Posts:
    4,757
    Likes Received:
    4,969
    Joined:
    Jan 3, 2018
    Location:
    USA
    First Name:
    Jeremy
    Truck Year:
    Square
    Truck Model:
    CUCV
    Engine Size:
    Small
    I’m sure you’re fine either way as long as you aren’t in the habit of sitting on the clutch at a stop.
     
  14. Snoots

    Snoots Supporting Member Supporting Member

    Posts:
    5,496
    Likes Received:
    7,997
    Joined:
    Jan 23, 2013
    Location:
    Georgia
    First Name:
    Roger
    Truck Year:
    1973
    Truck Model:
    Jimmy Sierra
    Engine Size:
    350
    Bushing for an automatic, bearing for a manual. That's what I've been told. My manuals have bearings and I've never had a problem. Never had a problem with bushings in the auto vehicles but why take chances?
     
  15. Ricko1966

    Ricko1966 Full Access Member

    Posts:
    1,098
    Likes Received:
    905
    Joined:
    Apr 11, 2017
    Location:
    kansas
    First Name:
    Richard
    Truck Year:
    1975
    Truck Model:
    c20
    Engine Size:
    350
    Wait until the day you go to do an auto to manual swap or swap a used engine in and discover its not machined for a pilot bushing. It happened with a 455 olds had to take the crank out and have it machined for a pilot bushing.
     
    Blue Ox likes this.

Share This Page