Background: 1974 260Z with a Gen I 327 SBC
As the title suggests, my turbo 350 automatic transmission shifts very hard between gears. It really seems to slam from 1st to 2nd and 2nd to 3rd. I've only owned the car for a month, the PO said he mostly drove it like a manual, switching from 1 to 2 and then to D so it wouldn't upshift under heavy acceleration, I guess to protect the rear end which is original.
Also, it won't stay running in gear when stationary. I have to shift into neutral so it doesn't bog down and stall.
I'm thinking the two issues are not precisely related, but I know very little (read: nothing) about automatic transmissions.
Any ideas?
Just realized the title might be misleading (it's not a Turbocharged 350Z!) but I can't change it.