Auto trans cooling line pressure

[Bruce B.]

Can someone give me an idea of the pressure that occurs in transmission cooling lines that run to and from a trans cooler.
Info on both Powerglides and the Turbo 350 trans would be appreciated.
Thanks

[Joe L.]

Re: Auto trans cooling line pressure

Can someone give me an idea of the pressure that occurs in transmission cooling lines that run to and from a trans cooler.
Info on both Powerglides and the Turbo 350 trans would be appreciated.
Thanks

Bruce------


Powerglides don't use external cooling. I don't know what the pressure is for a Turbo 350. However, Turbo 400 pressure runs in the range of 25-50 PSI. I would expect the Turbo 350 to be approximately the same.

[Bruce B.]

Re: Auto trans cooling line pressure

Joe,
Thanks for the info.
I thought the 63 and up aluminum PGs had external cooling, but I have been wrong before.

[Terry M.]

Re: Auto trans cooling line pressure

Bruce------


Powerglides don't use external cooling. I don't know what the pressure is for a Turbo 350. However, Turbo 400 pressure runs in the range of 25-50 PSI. I would expect the Turbo 350 to be approximately the same.

I am pretty sure some C2s use cooling with the Powerglide. I remember a story in The Restorer about restoring one.

[Mike M.]

Re: Auto trans cooling line pressure

terry and bruce are correct. 63's corvettes with power glide definitely had a cooler as did our 67 390 hp power glide. i believe all c-2s with power glides were externally cooled. mike
y

[Michael H.]

Re: Auto trans cooling line pressure

I think all 63-67's with Powerglide (with the exception of early 63) had the remote cooler.

[Jim T.]

Re: Auto trans cooling line pressure

My 1964 was a 4-speed, but my 1964 service manual has a picture of the transmission cooler for the power glide on page 7-19 mounted in front of the radiator and slanted towards the front.

[Michael H.]

Re: Auto trans cooling line pressure

There should be a drawing of the cooler in the Powerglide section of the 63-67 AIM's.

[Joe L.]

Re: Auto trans cooling line pressure

Joe,
Thanks for the info.
I thought the 63 and up aluminum PGs had external cooling, but I have been wrong before.

Bruce------


Yes, I was thinking of the pre-1962 cast iron Powerglides. The later aluminum Powerglides did have external cooling. I don't know what the pressure was, though. I would not expect it would have been very high.

[John H.]

Re: Auto trans cooling line pressure

The 1967 Chassis Service Manual has a section on Powerglide test pressures (page 7-34), and they vary from 50 to 125 psi. Similar test pressure charts in the 1961 Passenger Car Shop Manual (page 13-37) for the old cast iron Powerglide range from 40 to 275 psi.

[Larry M.]

Re: Auto trans cooling line pressure

Bruce------


I don't know what the pressure is for a Turbo 350. However, Turbo 400 pressure runs in the range of 25-50 PSI. I would expect the Turbo 350 to be approximately the same.

Agree with Joe. Info from other car forums indicate auto trans cooling line pressures in the range of 30-50 psig. Goodyear transmission hose is rated at 250 psig working pressure, so it is plenty good. I have also run replacement lines using copper tubing and stainless steel tubing. Copper is obviously much easier to fabricate, but could be a problem for long term road use.

Larry