Transmission. leak C6 trans.

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Rt.146
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Transmission. leak C6 trans.

Post by Rt.146 » Sat Nov 09, 2019 8:38 am

My 66 after sitting without starting for a little over a year started to leak transmission fluid, I been told it could be because it has not been started, and starting it should tighten up the gaskets, that would be nice, or is it more of a problem? Would it leak from where the bell-housing connects to the engine possible a seal or is it the trans. gasket itself any suggestions on the why, would be appreciated.

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RedBird64
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Re: Transmission. leak C6 trans.

Post by RedBird64 » Sat Nov 09, 2019 12:53 pm

It could leak from any seal or gasket. The most common seems to be the pan gasket and/or where the dipstick tube is connected to the pan. There's supposed to be a copper washer in there but it's usually lost and then they just tighten down the tube without it. Even the shop that rebuilt mine did that.
It does seem like mine drips less if it's driven regularly (same for the steering gear). It doesn't hurt to try!
BTW, there isn't a gasket around the bell housing (there's a paper gasket at the inspection plate but it's more for keeping dust out) . There's a seal around the shaft that comes out of the trans and into the torque converter.

Scott
1964 Coupe Wimbledon white/Rangoon Red w/black int. Owned for 42 years. It was my folks car before that (second owners). VTCI # 12013.

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cacockrum
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Re: Transmission. leak C6 trans.

Post by cacockrum » Sat Nov 09, 2019 1:32 pm

There's supposed to be a copper washer in there but it's usually lost and then they just tighten down the tube without it.
This may well be true for a COM, but in any C6 that I have seen the dip stick tube is sealed to the transmission case with an o-ring. A little pressure is applied to the o-ring when the upper part of the tube is bolted to the back of the engine.

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RedBird64
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Re: Transmission. leak C6 trans.

Post by RedBird64 » Sat Nov 09, 2019 3:02 pm

cacockrum wrote:
Sat Nov 09, 2019 1:32 pm
There's supposed to be a copper washer in there but it's usually lost and then they just tighten down the tube without it.
This may well be true for a COM, but in any C6 that I have seen the dip stick tube is sealed to the transmission case with an o-ring. A little pressure is applied to the o-ring when the upper part of the tube is bolted to the back of the engine.
That's right - I forgot!
Much better design.

Thx for the correction.
S
1964 Coupe Wimbledon white/Rangoon Red w/black int. Owned for 42 years. It was my folks car before that (second owners). VTCI # 12013.

Rt.146
Posts: 210
Joined: Wed Dec 20, 2017 7:40 pm

Re: Transmission. leak C6 trans.

Post by Rt.146 » Sun Nov 10, 2019 7:50 am

Thanks for the answers, Monday the car goes to AMOCO, I'll mention the copper ring to them. The auto upholstery shop I had interior work done, called the owner, he put me right in, killing two birds with one stone, he is able to take care of ignition problems also, mine will not start from the switch, though will turn from the battery. It has been two years since I bought it, it ran good then though needed quite a bit of work, progress is being made.

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RedBird64
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Re: Transmission. leak C6 trans.

Post by RedBird64 » Sun Nov 10, 2019 1:05 pm

Rt.146 wrote:
Sun Nov 10, 2019 7:50 am
Thanks for the answers, Monday the car goes to AMOCO, I'll mention the copper ring to them. The auto upholstery shop I had interior work done, called the owner, he put me right in, killing two birds with one stone, he is able to take care of ignition problems also, mine will not start from the switch, though will turn from the battery. It has been two years since I bought it, it ran good then though needed quite a bit of work, progress is being made.
As Cacokrum said, your C6 doesn't have the copper seal thingy - which is good because it was a terrible design!

Scott
1964 Coupe Wimbledon white/Rangoon Red w/black int. Owned for 42 years. It was my folks car before that (second owners). VTCI # 12013.

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