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Overfull Th350. What happens?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by MJF, Oct 8, 2002.

  1. MJF

    MJF 1/2 ton status

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    When you overfill a T350, what happens.

    I just bought a K5 & the tranny is leaking pretty bad. But as much as it's leaking, the dipstick still reads full. I'm assuming the kid I bought it from overfilled it, so what seal did I most likely blow by driving it with too much fluid in it?
     
  2. 76chevy

    76chevy 1/2 ton status

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    The main concern is the transmission will get hot and spit the fluid out if it is overfilled too much. Possibly on the engine or headers where it will catch fire. The other thing that will happen is it will cause the transmission to slip and eventualy fail.

    It would be worth it to replace the gasket if that is where it is leaking from. Could save you $1200.
     
  3. imiceman44

    imiceman44 1 ton status

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    When you say it still reads full did you check it in two different occasions or is it now at full.
    Mine leaks a lot but it berely shows on the dipstick because it's not much, the oil spreads on the ground and it looks like it's alot.
    Mine takes about a pint every couple of months, sometimes even 4-5 months.
    But I plan on fixing the leak and I suggest you do the same.
    Overfilling the tranny by just one pint is OK to compensate for off camber driving so you don't starve the pump, but more than that can be harmfull. That's what all the trans specialists say.
    IceMan
     
  4. MJF

    MJF 1/2 ton status

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    It reads full after spilling little puddles here & there. It's no biggie. I'll be swapping in a 400/205 in a couple days. I was just thinking that if this tranny is good & only leaking cause it was over filled & maybe messed up a seal that was easy to fix, I would leave it in there for a while.

    Before it leaked all over itself & made a mess, the fluid appeared to be coming from where the tranny/xfer case mated together. The tranny works well, but is just leaking like crazy. I haven't really tested the xfer case yet.
     

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