Super88-60

Hello. I dont know what transmission my 88 -60 has but I think its a jetaway.

Anyways, my problem is that it wont shift to third and fourth gear!! And when it shifts from first to second, you can hear a ”pschhh” noice, like its dumping air from the engine?

I figured I should start by changing the trans fluid and adjust the tv-cable. Whats my best bet here?

1. How much fluid do I need to buy, like whats the capacity in the pan?
2. How the hell do I know when the tv-cable is properly adjusted?

matt69olds

A Jetaway is a 2speed trans, there is no 3 or 4th gear.

I know nothing about the transmissions that your car would have come with. I don’t think the Jetaway trans is old enough to have been used in a 1960 model. The aluminum Chevy Powerglide was first used in 1962. I’m guessing the Jetaway was probably used around the same time v

rocketraider

1956-60 4 speed HydraMatics are called Jetaway in Olds, Super HydraMatic in Pontiac, Controlled Coupling HydraMatic in Cadillac. Cad and Pontiac continued using it thru 1964. Oldsmobile should have.

Y'all need to remember Oldsmobile built cars before Cutlasses!

OP- I can't help you with the problem but there are some ace HydraMatic people on here who can.

Tedd Thompson

I might be a little help but there are others who go a lot deeper into these transmissions than I. You might try adjusting the long rod that is attached to the transmission and the other end attaches to the carb linkage. Make small adjustments at a time, like 1/8 turn at a time That rod will delay a shift or speed it up but if not set to specks will not find the gear you are looking for. To do it correctly adjustments are best started at the carb to the bell crank and down to the transmission but as a test this will get you started There is a good chance that isn't your problem though but it needs to be checked first. A motor manual is a must when messing with these transmissions and there is confusion in name terminology which doesn't help because Oldsmobile used the same name on two completely different transmission (a 4 speed and a 2 speed with the same name) and they have nothing in common. This alone gets even later knowable Oldsmobile folks giving the wrong information for the wrong transmission, happens all the time. Make sure all parties are on the same page.

It could be a valving issue as the 3rd and 4th gears are separate from reverse 1st and 2ed, do you have reverse? A fluid change may help if valving is stuck or curded up. From memory I think it takes 91/2 quarts if the torus is drained but check this out because my memory sucks anymore. See where this gets you and let us know what changes or issues you encounter.... Tedd

Super88-60

Thanks alot!

The reverse is working properly. The shift pattern says PNDSLR and funny thing is when I put it in L (wich I think stands for Low?) it puts it in gear instantly, put when I put it in D it takes like 5 secs before the rpm drops and it starts driving, like its building up pressure or something?

matt69olds

I did not know there was a Jetaway transmission other than the 2 speed.

It’s confusing enough when people refer to the Jetaway trans as a Powerglide, the ST300 trans is Buick nomenclature to the basically identical Jetaway trans, who would have known?

So where does the Slimjim trans fit into the family? Didn’t Olds have a “automatic” trans that still used a clutch for starting from a stop? Who can keep track of all this?

Maybe we need a sticky on all the transmission variety common to these cars.

Super88-60

Btw I cant seem to find any shop manuals online. I dont want to buy from eBay since I dont live in the US and it would probably take like 2 weeks before I would get it

rocketraider

1937-1939 Automatic Safety Transmission R N LO HI and had a clutch pedal. 1st and 2nd in LO, 3rd and 4th in HI

1940-1952: HydraMatic N DR LO R, 4 speeds

1953-1956: Dual Range HydraMatic N DR S LO R, 4 speeds

1956-1960: Controlled Coupling Jetaway HydraMatic PNDSLR, 4 speeds

1961-1964 fullsize exc 1964 Jetstar 88: Roto HydraMatic 10 Slim Jim PNDSLR, 3 speeds

1961-1963 F85: Roto HydraMatic 5 PNDSLR, 3 speeds

1964-1969 Cutlass, 1964-69 Jetstar 88/Delmont 88/base Delta 88: Jetaway (ST300) Park RNDL 2 speeds, electric downshift

1965-later B-C-E, 1967-later A w/400cid and X body Turbo HydraMatic Park RNDSL 3 speeds, electric downshift 400/375/425, cable downshift 350

Then there's the zillion or so THM variations starting around 1976.

Confused yet?!🤪

Super88-60

I found a manual

http://www.oldcarmanualproject.com/m...ans/index.html

this should be the right one, yes?

rocketraider

Yes. Good luck.

d2_willys

3 things come to my mind:
1) Fluid level
2) Valving is sticky. This could be in valve body, OR the governor. The G-2 hydraulic circuit controls 3 and 4 gears.
3) Rear clutch is not engaging. This could be due to worn clutch plates, annular piston seal, or clogged piston apply circuit.

Look at the troubleshooting guide for further diagnosis.

Tedd Thompson

And anything D2 ****** says should be made into a sticky as he is the guru of dual coupling transmissions and what he says is gospel.....Thanks for stopping by....Tedd