# Gear Ratios for the B13/14/15 and P10/11 SR Transmissions **URL:** \ **Category:** Canada Nissan Automotive\ **Created:** [February 24, 2007, 8:06am UTC](https://forums.speedlife.net/t/gear-ratios-for-the-b13-14-15-and-p10-11-sr-transmissions/133016 "2007-02-24T08:06:54Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Hanzzzzz](https://avatars.discourse-cdn.com/v4/letter/h/3e96dc/32.png) [@Hanzzzzz](https://forums.speedlife.net/u/Hanzzzzz)\ **Post date:** [February 24, 2007, 8:06am UTC](https://forums.speedlife.net/t/gear-ratios-for-the-b13-14-15-and-p10-11-sr-transmissions/133016/1 "2007-02-24T08:06:54Z")
a little bit of info for anyone thinking about the P11/B15 transmission swap ![http://http://www.torontonissan.ca/forums/attachment.php?attachmentid=157&stc=1&d=1172333094](http://http://www.torontonissan.ca/forums/attachment.php?attachmentid=157&stc=1&d=1172333094) A great swap guide with pictures can also be found here: [http://www.sr20forum.com/showthread.php?t=97257](http://www.sr20forum.com/showthread.php?t=97257) ---
**Author:** ![Hanzzzzz](https://avatars.discourse-cdn.com/v4/letter/h/3e96dc/32.png) [@Hanzzzzz](https://forums.speedlife.net/u/Hanzzzzz)\ **Post date:** [February 24, 2007, 10:16am UTC](https://forums.speedlife.net/t/gear-ratios-for-the-b13-14-15-and-p10-11-sr-transmissions/133016/2 "2007-02-24T10:16:18Z")
some more useful info, can’t guarantee it’s %100 correct, but it seems legit [http://www.sr20forum.com/showthread.php?t=104113](http://www.sr20forum.com/showthread.php?t=104113) basically the general concensus is that a B15 LSD trans would give you a more ideal ratio for N/A, where as the 2000+ P11 LSD trans is better suited to a turbo car however, the 99 P11 transmission is the same as the B13/14 and if 5 forward gears arent enough, the Spec-V 6-speed QR transmission can also be made to work with the SR. [http://www.sr20forum.com/showthread.php?t=175334](http://www.sr20forum.com/showthread.php?t=175334)