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Old 07-23-2007, 11:29 AM
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Powerglide????

Greetings all. I own a 68 Cutlass Convertible with a 2 speed Powerglide and a stock 350 2bbl. I am not going to go crazy with a rebuild, mostly stock with a slightly bigger cam and conversion to headers & dual exhaust probably move to a 4bbl too. I have experience with the TH350 & 400 my initial, basic questions concerning the Powerglide are-
*Is this a worthy tranny to rebuild or should I consider a 350 or 400?
*Is there a "kickdown" while punching the gas? Mine does not seem to.
*I did u-joints this weekend and discovered that the spindle is quite loose ( I can wuggle it up and down approx 1/4 inch), common sense says that is not right, easy fix? possibly shot tranny? certain failure looming?
*any and all advice and comments will be welcome by me!
Thanks much,
Steve
PS, I have ordered a Munroes Powerglide book to read up.....

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Old 07-23-2007, 12:08 PM
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powerglide

If this is the trans that came stock with this vehicle it is not a powerglide, but rather a superturbine 300, still a two speed though.

I would rather have a 350 turbo, but thats just a matter of preference.

For a near stock motor, this trans will do just fine.
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Old 07-23-2007, 01:11 PM
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excuse my ignorance

If I do indeed have the Jetaway ( Super Turbine 300 ) what do you folks say about that tranny? stock plus a cam and headers, is it durable etc after a rebuild, can it be modified with a shift kit etc???
Thanks again.
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Old 07-23-2007, 04:32 PM
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powerglide

It is not a jetaway. And yes it will hold up.

If you want send me a PM along with a fax number and I will fax you instructions on how to tweak out this unit, sort of like a shift kit.
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Old 07-24-2007, 04:14 AM
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I better ID the tranny first, what are you thinking it is?
Thanks
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Old 07-24-2007, 05:13 AM
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powerglide?

If it is a ST-300 it will have.... a 3 bolt cover on the left side rear, this is for the governor. A modulator on the right rear. A big round servo cover on the right front side of trans. and a switch on the left side, for passing gear.

Just curious, where did you get jetaway from? I have done one of those units in my life, but that was a long time ago, the jetaway is just a blur now.

By the way, the ST-300 is a two speed transmission, as is a powerglide.
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Old 07-24-2007, 06:39 AM
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Quote:
Originally Posted by briscoe
If it is a ST-300 it will have.... a 3 bolt cover on the left side rear, this is for the governor. A modulator on the right rear. A big round servo cover on the right front side of trans. and a switch on the left side, for passing gear.

Just curious, where did you get jetaway from? I have done one of those units in my life, but that was a long time ago, the jetaway is just a blur now.

By the way, the ST-300 is a two speed transmission, as is a powerglide.

seems as i remember that the term Jetaway was still used after the trans was changed to the ST-300 for a year or two by the marketing folks....

The 68 vehicle in question here should be a ST-300 if it is a 2 speed trans. Shifter should indicate this with P R N D L indicator .... ?

Briscoe ... you and I know the ol Jetaway trans was dropped fast when the t-400 came along and a few years later the t-350 was released in 69 model yr.

The ol t-350 trans must have cost GM like 5 bucks to build ( or something) ... in a few short years the t-350 was in nearly every RWD car they built



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Old 07-24-2007, 09:39 AM
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Quote:
Originally Posted by briscoe
It is not a jetaway. And yes it will hold up.

If you want send me a PM along with a fax number and I will fax you instructions on how to tweak out this unit, sort of like a shift kit.
Actually, Olds DID call it a Jetaway, not to be confused with the Jetaway from the 1950s. It is certainly NOT a Powerglide, though it does have the same gear ratios. Parts for the ST-300/Jetaway are difficult to come by.
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Old 07-24-2007, 09:56 AM
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Powerglide

One thing I like about this site, you can always learn something.

I don't remember the st 300 being refered to as a jetaway, but that doesn't mean anything, I don't remember what I don't remember!

Crosley, remember when the 350 was considered a junk trans, now look at it.

One other thing, I would like to have all of the 350 parts back that I've thrown away over the years. Twenty five years ago we had so much of it laying around, lots of 350 stuff got tossed out
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