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They are ponderous - and for good reason. If you try and force them thru the shift you will quickly damage the synchros on an expensive box. Every owner of an earlier era 911/930 needs to accomodate this if you want a long life out of the box. My SC has done about 50,000 miles since I have had it. Box still perfect, and not newly built when I got it. My 930 I rebuilt a torn up box when I got the car. It has survived about 7 seasons on the track - but 2nd is starting to complain. I could push th shifts harder, and simply rebuild the box each year, for a few split seconds potentially saved in lap time. 2nd is the most common synchro to go first it seems. But basically you do the transition on downshifts with a slight hesitation at the neutral point before hitting the lower gear. Say $s and cents and then shift to lower gear.
+1 on above advice - the rear linkage coupling can come loose on a tapered allen screw. My 930 seems intent on this even with loctite.
Regards
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
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