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Thread: 901 short shift kit

  1. #1
    Senior Member
    Join Date
    Dec 2007
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    NYC
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    505

    901 short shift kit

    I recently asked if anyone was going to make american racing wheels for our vintage 911s and Harvey responded that this was in the works. Emboldened by this recent success how about someone making factory style short shift kits for the 901/902 transmissions? Please.
    1970 911S
    1963 Abarth Monomille
    1974 2002 Turbo

  2. #2
    There was no factory short shift kit for the 901 gearbox...just crappy aftermarket synchro crushers.
    -Marco
    SReg. #778 OGrp: #8 RGrp: #---
    TLG Auto: Website
    Searching for engine #907495 and gearbox 902/1 #229687

  3. #3
    Amen to that! What a POS design that was! I removed the one from my '71 the other day!

  4. #4
    The factory short shift was a 915 thing. I actually liked the Weltmeister that was on my race car, that and a WEVO coupler made the shifting unambiguous. Both are available.

    Yale you could always convert to a 915 shifter with the factory style kit.
    1966 911 #304065 Irischgruen

  5. #5
    Quote Originally Posted by 304065 View Post
    The factory short shift was a 915 thing. I actually liked the Weltmeister that was on my race car, that and a WEVO coupler made the shifting unambiguous. Both are available.
    We may be in the minority but I agree with 304065. I have a Wevo coupler, tranny and engine mounts, and the aftermarket Short Shift Kit. In my opinion the problem with the aftermarket SS kit is that it uses a later, shorter shift arm (964?) as well as raising the pivot point. The combination of these two factors is what reduces the shift distance so substantially. To me it was not about having the shortest throws (which increase effort dramatically too), but the most precision.

    What I chose to do was extend the shift arm back up to the standard length which takes a LOT of effort back out of the shifter. This returns the level of effort almost completely back to normal while the raised pivot point still shortens the throws and increases precision several fold. With the proper fine tuning my 901 shifts with the precision of a Winchester Bolt Action which is a feeling I can attest is lacking in almost 100% of the other 901s I have ever driven.

    Cheers,
    -Mike

  6. #6
    I should add that all new bushings and a replacement shift guide plate were also part of the rebuild. Take slop out anywhere you can. There aren't that many places in the system for it to develop, so getting it out just takes time and a little patience.

  7. #7
    The problem with the Weltmeister short shift kit is that it moves the gearbox internals too quickly. In effect what happens is you "beat the synchros", as the operating sleeves are moving too quickly for the synchros to adequately [read: PROPERLY] do their job.

    Essentially what the Weltmeister kit does is shorten the life of the gearbox through accelerated wear and tear.

    SWEET!!
    -Marco
    SReg. #778 OGrp: #8 RGrp: #---
    TLG Auto: Website
    Searching for engine #907495 and gearbox 902/1 #229687

  8. #8
    Senior Member Harvey Weidman's Avatar
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    May 2005
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    Oroville, CA
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    1,850
    Marco, I couldn't agree more. A new Porsche owner brought his car by to show me and have me drive it to see what I thought of it. It had a 901 short shifter and to me, it took the joy out of driving the 901 trans. When we returned from the test drive, I put my stock shifter in for him to see what I was talking about. He couldn't believe how nice the trans was to shift with the stock shifter and immediately replaced his with the stock unit.
    Another happy camper...
    H

  9. #9
    Quote Originally Posted by 304065 View Post
    The factory short shift was a 915 thing. I actually liked the Weltmeister that was on my race car, that and a WEVO coupler made the shifting unambiguous. Both are available.

    Yale you could always convert to a 915 shifter with the factory style kit.
    Yes. A 915 shifter is a direct bolt-in to control a 901 gearbox. Allows a choice of short shifters as well. Using our shift attachment (Gate Shift kit), there's a spring-loaded path from 1st to 2nd (the 915 reverse pawl lever is removed when used with a 901).

    Sherwood
    Attached Images Attached Images  

  10. #10
    To restore the factory shifting effort with short shifters, add an extension onto the shift lever. We have 3" extensions for this purpose.

    We also have a 5.5" lever extension for those using the Weltmeister short shifter (shifts like a factory shifter).
    Attached Images Attached Images   

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