Have you seen a 915 tranny swap thread?, With pictures would be great. Options

[Twystd1]

OK,

I screwed up on another board and gave very incomplete data to someone.

I can't find a 915 swap thread using the search function.

I am looking for a thread that explains ALL of the issues with this conversion.

If you guys know of any thread on any board.

Please let me know. I really want to help this guy get it right.

Thanks fellas,

Clayton

[914-8]

I'm doing some work on my 915 conversion right now, have it out of the car and apart, so I've become very familiar with it. What issue are you looking at? There are quite a few. None are a huge deal, but they do kinda add up.

You have to have a way to mount it and to shift it. There's the Vellios kit and the Wevo kit to do that. It can be linkage shifted, you need to have a customized shift bar to do that (the angles have to be right). Or it can be cable shifted, but I wouldn't personally do that, at least based on the discontent I've heard from a lot of cable shift setups. With a stock style linkage/bar setup, my 915 in my 914 shifts just like my 915 in my 911.

You need a custom/modified pulley system for the clutch cable. You have to flip the RP. You have to adapt axles, but there's a lot of ways to do that. My 915 is from a '78 and is electronic speedo, I'm not 100% sure about the earlier ones, but I think they are all electric, so in a 914, you need a new speedo. Since it's driven off the RP, you also need to machine something in the case to relocate the speedo sensor.

From what I can see, that's it.

The 915 is a very good transmission, capable of holding a good amount of power. The only semi-weakness is 2nd gear, and 2nd gears only weakness is when you powershift into it (shift quickly then apply full power very quickly) with a lot of HP (say high 200s to 300+). If you just take it a bit easy on the shifts into second, it lasts a long time. The only real upgrade you can do to it for a 914 application is the Wevo bearing retainer, which harnesses the input and pinion bearing shafts together.