# Ca Tranny on a Sr

**URL:** <https://forums.speedlife.net/t/ca-tranny-on-a-sr/95322>\
**Category:** SON240sx Automotive\
**Created:** [April 27, 2006, 7:41am UTC](https://forums.speedlife.net/t/ca-tranny-on-a-sr/95322 "2006-04-27T07:41:00Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\
**Post date:** [April 27, 2006, 7:41am UTC](https://forums.speedlife.net/t/ca-tranny-on-a-sr/95322/1 "2006-04-27T07:41:00Z")

</div>

Can it be done?? If so what affects will the Diff Ratios Make??

---

<div class="post-metadata">

**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\
**Post date:** [April 28, 2006, 3:35pm UTC](https://forums.speedlife.net/t/ca-tranny-on-a-sr/95322/2 "2006-04-28T15:35:08Z")

</div>

> [@Benson240sx](#):
>
> Can it be done?? If so what affects will the Diff Ratios Make??

CA tranny will work but you need to use the SR bell housing (which im sure you know)

Gearing in the CA is different then the SR (5th gear + final drive)

CA18DET from a 88-90 Silvia K’s

1st - 3.321  
2nd - 1.902  
3rd - 1.308  
4th - 1.000  
5th - 0.838

reverse - 3.382  
final drive - 4.363

SR20DET from 90-93 Silvia K’s

1st - 3.321  
2nd - 1.902  
3rd - 1.308  
4th - 1.000  
5th - 0.759

Reverse - 3.382  
Final Drive - 4.083

---

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\
**Post date:** [April 28, 2006, 10:42pm UTC](https://forums.speedlife.net/t/ca-tranny-on-a-sr/95322/3 "2006-04-28T22:42:40Z")

</div>

thanks jeff, i am too lazy too swap the bell housing this weekend and I think 5 gear would kill my milage