1966Oldsmobile

Hi guys,
Newbie want to now where i can find some informations about what gear ratio my rear end have. If I have the "original" at what I have to change for better accelaration.

´66 F85, 330cui, 2-speed automatic (swap to 200-4R next spring)

Thank you very much

svnt442

At this point (almost 50 years old) it's best to pull the cover and manually check the gears to be sure what you have. It's not a bad idea anyway just so you can change the fluid out.

monzaz

You need to change the ratio for better acceleration - You have a good selection of aftermarket gears out there . A bit pricey but they are avaialble.

3.36 3.55 for a 3 speed max or with the over drive 3.553.73 3.90 will work great. Jim