I know I've seen this here but I am having trouble with the search, so please point me in the right direction.

Google '901 gear ratios'. First link.



The info in also in the Wiki (link at top of page).

pic lifted off this site - aaron i think

Flipped ZD is n the wrong place on that chart, it was done up by Aaron Cox.

It is a pretty good place to start. Race914 also has a spread sheet that you can input to and it will calculate things for you.

Thanks, guys- I am delving in areas where i previously lurked, where i previously "feared to tread" looking forward to the clinic, Doc

phil

I find it a bit odd that guys put a butt load of T,M,E, & maintenance into their motors but transmissions get treated like a red headed step child. As a consequence, Dr. Evil does well chasing 914 transmissions all over hell & gone......it seems to me to be a hell of a service to the community but...transmissions are a very basic part of the car.

All true. We are probably spoiled knowing that the Dr, Rich Castro and a couple others can take a used up trans and restore it quickly and reasonable $. When the motors go bad and need a rebuild, I don't think there is any getting around lots of time and cash.

I'm doing a 3.0 and I have a rebuilt /4 trans (Evil's Canada clinic).
I have an HB gear set (and a Z)
What gear ratio (and RPM at 75mph) would that give me?
I'm looking at better hwy mileage, digging into the box is no problem, but is it worth it?

HB is fine and you would flip it to place in 5th. It is worth it to change. I would change some of the others as well.

I actually have the factory 901 ratio chart at home. It was scanned and posted here a long time ago.

Here is a chart I made that includes flipped ratios. It makes for a good quick reference.

So whats a flipped HB?

Not complete, obviously

A flipped HB is an HB the is run in reverse

Smartass

Better than being a dumbass!