heavychevy Posted August 5, 2013 Share Posted August 5, 2013 My car has a 3rd gear munching problem. I can get 10 or so months from a stock one and maybe 18 months from a strengthened one. At about $2500 a pop (with labor), I'm trying to find some better solutions. The G96 box in the 911 is not great with big torque and big grip. Most turbo cars end up eating 3rd gear regularly with this setup. One solution that has been brought up is a straight cut 3rd gear. The G96 gears are house separately so I would only change one gear to straight cut and keep the rest helical. Car would also retain helical synchros. Question is if one straight cut gear would cause me to take a .2 penalty. Quote Link to comment Share on other sites More sharing options...
kbrew8991 Posted August 5, 2013 Share Posted August 5, 2013 yep, so might as well straight cut them all and make it worth it Quote Link to comment Share on other sites More sharing options...
heavychevy Posted August 5, 2013 Author Share Posted August 5, 2013 yep, so might as well straight cut them all and make it worth it That's a 12-15k job in my car (buying each gear set separately). And still no guarantee to last all that much longer. I'd rather add the $2500 to the list of consumables, or spring for a real sequential. ------ Quote Link to comment Share on other sites More sharing options...
kbrew8991 Posted August 5, 2013 Share Posted August 5, 2013 Mo Money, Mo Speed, Mo Problems... $12k would build two TTF/PTF cars. Must be nice Quote Link to comment Share on other sites More sharing options...
TurboShortBus Posted August 6, 2013 Share Posted August 6, 2013 OK, you might be in luck. Something didn't seem quite right to me ("dog ring" does not necessarily imply "straight cut," and vice versa; they are 2 different features of a gear), so I called Greg during my drive home. Here is the TT1/TT2/TT3 rule in question: If: Dog-ring/straight-cut gears (non-synchromesh transmission),and/or sequential/paddle shift/semi-automatic, subtract 0.2 = ____________ (no assessment for automatic transmission utilizing a torque converter) If you replace a synchromesh helical-cut gear with a synchromesh straight-cut gear, then there is no assessment. If you replace a synchromesh helical-cut gear with a dog-ring helical-cut gear, then you are assessed -0.2. When the rule was written, it was apparently assumed that all straight-cut gears are also dog-ring, which is not necessarily the case. Change away... Mark Quote Link to comment Share on other sites More sharing options...
getfast Posted August 6, 2013 Share Posted August 6, 2013 Oh and please fix your signature on here with all the money you save, because " http://www.vmaxatl.com/forums/ " goes nowhere... Quote Link to comment Share on other sites More sharing options...
heavychevy Posted August 6, 2013 Author Share Posted August 6, 2013 Thanks Mark! I was thinking that was my only chance when I asked. Now lets see how long this straight cut gear lasts. Jon, my bad I have just been too lazy to delete that. Quote Link to comment Share on other sites More sharing options...
Varkwso Posted August 22, 2013 Share Posted August 22, 2013 Thanks Mark! I was thinking that was my only chance when I asked. Now lets see how long this straight cut gear lasts. Jon, my bad I have just been too lazy to delete that. Mark is the man.... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.