# RB

**URL:** <https://forums.speedlife.net/t/rb/122445>\
**Category:** SON240sx Automotive\
**Created:** [March 10, 2009, 6:16am UTC](https://forums.speedlife.net/t/rb/122445 "2009-03-10T06:16:18Z")\
**Posts on this page:** 1\
**Showing post:** 47

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**Author:** ![bignate](https://avatars.discourse-cdn.com/v4/letter/b/7feea3/32.png) [@bignate](https://forums.speedlife.net/u/bignate)\
**Post date:** [March 10, 2009, 10:55pm UTC](https://forums.speedlife.net/t/rb/122445/47 "2009-03-10T22:55:27Z")

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> [@credit card debt...](https://forums.speedlife.net/t/credit-card-debt/20706/69):
>
> Run Redline shockproof in the tranny. Oil is obviously up to you.

If its an RB tranny DO NOT RUN HEAVY SHOCKPROOF!

I dont know about S chassis synchros but the RB ones are copper and the redline heavy shockproof will eat them. The only time I recommend you use that oil is if you wanna squeeze the last little bit of life out of some dying sychros.

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