On the top of the transmission about half way down from the bellhousing to the tail shaft. it is a small plastic tube that you can break if you are not careful because as plastic gets older it becomes more brittle since its a hard plastic.
The recommended tire size for a 700 x 25c tube is 25mm wide.
The recommended tire size for a 700 x 28c tube is 28mm wide.
700 R4 transmission.
The recommended tire size for a 700 x 20-25c tube is 20-25mm wide.
Dextron 111
700 r4
The recommended tire size for a 700 x 25c inner tube is a 25mm wide tire that fits a 700c wheel.
For a tire size of 700 x 23-25c, you should use a bike tube that is 700c x 23-25c.
They both are the same.
Manual transmission-700 rpm Auto transmission - 750 rpm
700 R4, the better way to tell is when the down shift cable is no longer present the transmission shifting is computer controlled 4L60E which is a more complex (computer controlled) version of the 700 R4. I looked at a 92 today and it had a 700 R4.
700 r 4