1964 Pontiac Auto Transmission

[StevenGuthmiller]

Been looking through all of my Pontiac kits and they're all 4 speeds.

Anybody know what kits would have a Pontiac automatic transmission, or anywhere that I could find one?

 

 

Thanks!

 

 

 

Steve

Edited March 29, 2020 by StevenGuthmiller

[Bucky]

I'm not able to dig through my kits at the moment, but would the Trumpeter '60 Bonneville have one? 

[StevenGuthmiller]

1 hour ago, Bucky said:

I'm not able to dig through my kits at the moment, but would the Trumpeter '60 Bonneville have one? 

I believe it does, but I'm not certain if it would be correct for a '64.

 

 

Steve

[Ron Hamilton]

Johan 1963 Olds Starfire has a Slim Jim in it. Other than that you may have to have one 3D printed.

[Bucky]

Are the ones in the AMT '65 Pontiac kits wrong? I built some years ago, but don't remember their transmissions.

[1930fordpickup]

What about the Buick kits? 

 

[Mark]

The Pontiac kits all have manual transmissions.  The Buicks used Dynaflow which was entirely different from the Roto-Hydramatic (Slim Jim) that Pontiac used.  Chevrolet used Powerglide, different again.  

The Jo-Han Olds unit is the best/closest available.  Their Cadillac piece is pretty similar as I remember.

[ewetwo]

What about the 65 Pontiac Grand Slam ?

[64Comet404]

I remember a Hydromatic in the AMT Parts Pack engines, but I can't remember if it was on the Pontiac or another engine. Beyond that, I think there was an automatic in the '64 Olds Cutlass kits, but can't remember if it was a lighter-duty unit.

[espo]

The automatic transmission used in the Pontiac Tempest line including the GTO for '64 - '67 was a 2 speed version of the Turbine 300 that was used in the Buick and Oldsmobile models of the same era. From the outside they look very much like a GM Turbo 350 Automatic. 

[Ace-Garageguy]

Kinda depends on what you're building.

Through '64, the bigger big cars cars (Star Chief & Bonneville) used the older Hydramatic.

Shorter wheelbase big cars used the "Slim Jim" Roto Hydramatic.

[my66s55]

From Wikipedia -GM Roto Hydramatic transmission

 

 

"The Roto Hydramatic was used in all full-sized Oldsmobile models including the Dynamic 88, Super 88, Ninety-Eight and Starfire from 1961-1964 as well as the compact Oldsmobile F-85 from 1961-1963. Pontiac used the Roto Hydramatic from 1961-1964 on its shorter-wheelbase full-sized cars including the Catalina, Ventura and Grand Prix, but continued with the older four-speed Super Hydramatic design in the longer-wheelbase Star Chief and Bonneville models."

[StevenGuthmiller]

Great info guys.

But what I'm hearing so far is that I'm basically SOL!

 

 

 

Steve

[Ace-Garageguy]

6 hours ago, StevenGuthmiller said:

Great info guys.

But what I'm hearing so far is that I'm basically SOL!

Not necessarily. The Johan Olds mentioned is supposed to have a "Slim Jim" Roto Hydramatic. I'll need to pull the kit and look, because "supposed to" doesn't always mean "does in fact".

The bigger Super Hydramatic (Star Chief and Bonneville) isn't in anything, far as I know...but you could build a passable example by modifying one of the earlier Hydramatics available in parts-packs.

 

Edited March 29, 2020 by Ace-Garageguy

[Erik Smith]

Here is the ‘62 Olds F-85 transmission, looks similar at first glance?

 

[StevenGuthmiller]

This is the Johan '63 Starfire tranny, followed by the '64 Cadillac.

Is this what I'm looking for?

 

 

 

 

 

 

 

 

 

Steve

[Ace-Garageguy]

40 minutes ago, Erik Smith said:

Here is the ‘62 Olds F-85 transmission, looks similar at first glance?

Yup, looks kinda like the short-tailshaft version of the Roto box in Tempest .

And here's a thread on the big-car Slim Jim...

 

[espo]

I don't know why I got off on the Tempest and the  whole Turbine 300 thing. The information supplied by others would be correct if you should be building a full size Pontiac. 

12 hours ago, StevenGuthmiller said:

Been looking through all of my Pontiac kits and they're all 4 speeds.

Anybody know what kits would have a Pontiac automatic transmission, or anywhere that I could find one?

 

 

Thanks!

 

 

 

Steve

 

[StevenGuthmiller]

By the way, this is for my '64 Pontiac Grand Prix project folks, if that makes any difference.

 

 

 

Steve

[Ace-Garageguy]

9 minutes ago, StevenGuthmiller said:

By the way, this is for my '64 Pontiac Grand Prix project folks, if that makes any difference.

Yeah, the GP supposedly used the "Slim Jim".

Neither of those Johan gearboxes are really right, but either would be probably as close as you're going to get.

The correct gearbox case bolts together in 3 pieces, like zo. Neither of your doners represent this correctly. So whichever one you think looks best, well, there you go.

A somewhat more accurate appearance might be obtainable by mating a manual gearbox bellhousing to whichever one you choose.

Edited March 29, 2020 by Ace-Garageguy

[StevenGuthmiller]

At this point, it appears that it might be easier to try to convert the console from an automatic, to a 4 speed, but I don't know how easy that will be either.

 

 

 

Steve

 

[1972coronet]

From the AMT Parts Pack ( 283 Chevy and Pontiac / "B&M Hydro" trans) .

Trans looks good to my eyes...

[StevenGuthmiller]

46 minutes ago, 1972coronet said:

From the AMT Parts Pack ( 283 Chevy and Pontiac / "B&M Hydro" trans) .

Trans looks good to my eyes...

That would be after market.

I'm shooting for as close to factory stock as possible.

 

 

 

 

Steve

[StevenGuthmiller]

My only other option at this point is to try to scratch build a 4 speed console.

That looks like more work than it's worth.

 

I would need to go from this.

 

 

To this.

 

 

 

 

 

 

Steve

[Jack L]

the cadillac engine in the 59 Elcamino has a hydramatic