Hydramatic trans Oil
 

Hi Gang,

What is the recommended trans oil for Hydramatic now a days?

Re: Hydramatic trans Oil
 

Greetings fellow club members!

An excellent question! Actually, I really don't know what to suggest other than staying with a trans fluid for GM Automatics only. Back in the day, the fluid for these old transmissions was known as Type A transmission fluid. See the following paragraph---

From GM Roto Hydramatic Transmission, Wikipedia: "All HydraMatic transmissions suffer some shift quality with today's ATF fluid,:blink: as Type "A" fluid is not available. The main ingredient of Type "A" was banned years ago, however Japanese cars that have CVT automatic's still use that ingredient in their special CVT fluid. That CVT fluid can only be bought at the dealer. The ingredient is Whale oil."

I copied and pasted the above quote from GM Roto Hydramatic transmission From Wikipedia, the free encyclopedia. This information may be useful to you. Apparently, you would do no harm to your old Hydramatic by using today's GM recommended Automatic Transmission fluid, just that you may suffer "shift quality" by using today's fluid. Just what shift quality you would suffer (harsh upshift/downshift) or other shifting problems were not described in the article. Armed with this information, your choice (dilemma) will now be do you use today's GM recommended fluid for modern day transmissions, or do you go to a Japanese car dealership and purchase fluid used in the Japanese CVT transmissions?

Re: Hydramatic trans Oil
 

Dextron IV