Are there any easy choices for upgrading the 4 speed in a 930?

[David]

Originally Posted by jcw000

Hi Mike,

Thanks for all of the info. I am looking now at either a 1.444 (Albins) or 1.471 (Guard) 2nd and a .963 (Albins) 3rd. Just wondering how you picked the 1.444 2nd and .928 3rd and whether your are happy with them or have any regrets. Did you go with Guard, Albins, or other? Do you find the new gears any louder than OEM? Sorry if you've discussed elsewhere; I looked but couldn't find your comments on these items.

Best,

Josh

My transmission is at CMS now so I can't give any real experience yet. They did say the aftermarket gears tend to be louder than stock vs the aftermarket R&P which tends to be quiet. This is why I chose to change to a lower R&P and then raise the 1st gear so it's not too short. Thinking is I don't spend much time in 1st gear so noise won't really matter.

As far as Albins or Guard, it seems like that decision is more based on what's available.

[MikeD930]

Originally Posted by jcw000

Hi Mike,

Thanks for all of the info. I am looking now at either a 1.444 (Albins) or 1.471 (Guard) 2nd and a .963 (Albins) 3rd. Just wondering how you picked the 1.444 2nd and .928 3rd and whether your are happy with them or have any regrets. Did you go with Guard, Albins, or other? Do you find the new gears any louder than OEM? Sorry if you've discussed elsewhere; I looked but couldn't find your comments on these items.

Best,

Josh

Hi Josh,
At the time when I decided to re-gear my gearbox I looked for all of the available used gears that were for sale. I could have went with stock gearing but I wanted 2nd gear to be closer to 1st and 3rd gear evenly spaced between 2nd and 4th. I never had stock gearing except the 1st gear. The previous owner changed 2nd, 3rd and 4th gears (Guard). It was noisy especially on the highway. My car now has stock 4th gear so it's much quieter. I have no regrets...although there are times when I wish I retained close 2-4th gearing except when traveling on the highway for hours.

What is your reason to change your gearing if it's stock? I'd leave it stock if your car can handle the big gap between 1st & 2nd. My car (far from stock) does not have max torque at 3000-3500 rpm...it's at higher rpm...so bringing 2nd gear closer to 1st helps.

[jcw000]

Thanks David and Mike for the feedback.

The reason I am considering changing 2nd and 3rd is that I really dislike the 1-2 shift, just too stiff and slow for my tastes. I had it rebuilt only about 2,500 miles ago and it’s fine except for that 1-2 shift (and putting it into reverse, but that’s another story). I’ve read and heard that the 1-2 shift could be improved by switching to a different 2nd gear, and once you do that, it makes sense to change 3rd to balance it out. I would most likely go with Albins 1.444 2nd and .963 3rd as the rpm drop would end up fairly close across shifts and I’ve read that Albins are pretty quiet. I’d still have OEM for 1 and 4 so it seems like a nice setup, but as long as 1-2 is better I’ll be happy.

[MikeD930]

Changing the gear ratio will not have any affect to the way the gearbox shift. There are a number of reasons for stiff/balky shift. I would check for proper position of the shift rod so that it shifts into 1st gear and reverse evenly in the garage with the engine off but with clutch depressed. The other issue could be mis-located shift fork for 1-2 gears.

These gearbox does not shift gears like a more modern gearbox...it's still relatively balky and slow.

[jcw000]

I’m pretty confident that it’s set up correctly. The other couple of 930s with stock gearing that I’ve been in feel pretty much the same, so maybe it’s just my pet peeve. Shortening 2nd will reduce the RPM gap between 1-2 so the synchro has less work to do and should make the shift a bit smoother. How much, not sure, but I think it would be noticeable.

[930cabman]

I've had a 1987 930 lookalike since 2009, got all the 930 stuff + a G50, all in good condition. Blows 1 bar, shiny black and available. I have tried to sell, but no bites as she is not a real 930, but has all the good stuff.

Hate to part her our, but make me a deal I can't refuse

[kamaro]

I've been trying to enhance the shifting characteristics of my 930 transaxle and then I throwed the towel and did a G50 conversion and so glad I did so. It was expensive but when I finished it and drove it for the 1st time it was worth every penny.

[David]

It's just so pretty, I had to post a picture

I'll update on how I like the new gearing when she's all back together.

[TurboKraft]

Originally Posted by David

It's just so pretty, I had to post a picture
I'll update on how I like the new gearing when she's all back together.

Not shortened -- modifying the chassis?

[David]

Originally Posted by TurboKraft

Not shortened -- modifying the chassis?

No, just stock 930 case with 8:37 R&P and 18:33 1st gear.

[TurboKraft]

Originally Posted by David

No, just stock 930 case with 8:37 R&P and 18:33 1st gear.

Eyes are aging, can't see detail on a phone screen. Obvious now on a proper monitor...
8:37 is a great R&P

[mark houghton]

I guess I'm the exception, kinda like the stock 930 4 speed...but then again I've yet to drive one that's been modified or a G50 for that matter...so I have nothing to compare against.
I do like just standing on the throttle and not having to "rush" to the next gear. Seems the tall gears are intentionally matched to a heavier flywheel and characteristic turbo lag.

[LeeS930]

Before modern EFI I really had to keep the rev's up to make time with the 4 speed, extra/shorter gears would have made driving quickly easier. With an upgraded engine and EFI I now enjoy early boost -and- increased hp. This combo makes the stock 4-speed gearing far less of a compromise. More gears and close ratios would be faster, but the old 4-speed just feels right in the 930.

[gassian]

Originally Posted by LeeS930

Before modern EFI I really had to keep the rev's up to make time with the 4 speed, extra/shorter gears would have made driving quickly easier. With an upgraded engine and EFI I now enjoy early boost -and- increased hp. This combo makes the stock 4-speed gearing far less of a compromise. More gears and close ratios would be faster, but the old 4-speed just feels right in the 930.

I am glad to hear that as i will be in same boat with stock 4 speed and modern EFI.
Soon i should be able to see how different it will feel from CIS.

[Porsche 935]

I also run efi and more power and I changed 2nd, 3rd and 4th to longer gear ratios so I stay on boost longer. It's now more like a 3 speed because you need to be going over 75 to use 4th

[Tippy]

The G50/52 is the best 1st gear of all. My buddy had a 964T for a short time and I got to drive it back to his house after purchasing a couple of hours away.

The 930 1st is too tall IMO and the G50/00/01/etc. 1st gears are too short.

I have a Carrera 3.2 with a G50, and when I moved up to a 26.4” tall tire, it made 1st gear longer and just felt “better” all around. Nicer to have lower RPM’s on the highway, too.

[Matt Monson]

Originally Posted by Tippy

The G50/52 is the best 1st gear of all. My buddy had a 964T for a short time and I got to drive it back to his house after purchasing a couple of hours away.

The 930 1st is too tall IMO and the G50/00/01/etc. 1st gears are too short.

I have a Carrera 3.2 with a G50, and when I moved up to a 26.4” tall tire, it made 1st gear longer and just felt “better” all around. Nicer to have lower RPM’s on the highway, too.

That 3.154 1st was also used in Swiss and RS spec 964 5spds. You don’t need the longer turbo gearbox to get that ratio. I have them in stock.

[RarlyL8]

Having 4 useful gears for fun and a 5th gear for overdrive cruising is a pretty nice setup. That spread can cover just about any driving situation. The gears and engine output have to match up though or you'll never be in the right gear. The stock 4spd can fit the bill pretty good as well once that match is achieved. Lots of ways to do that by manipulating turbo lag, the torque curve and boost levels. You don't want to do an expensive tranny or gear swap then later on want more power and find the gearing is no longer optimal.

[Hot930]

Originally Posted by ficke

Here are pictures of the 1st gear on the Ruf 5-speed

Hi I have the same box in my 88 930
I’m stuck I started having shifting problems my old shifter is sloppy and you have to really line the gears up to shift. There also was had an extra length welded on the selector shaft I’m looking at a better shifter wevo any recommendations

[David]

Originally Posted by Hot930

Hi I have the same box in my 88 930
I’m stuck I started having shifting problems my old shifter is sloppy and you have to really line the gears up to shift. There also was had an extra length welded on the selector shaft I’m looking at a better shifter wevo any recommendations

Check the bushing on the shift rod in the tunnel behind the shifter.