Jump to content
SAU Community

Recommended Posts

Hey guys,

Well I have been very happy with my rb30dett so far and I love it.

Problem I have is that 5th gear seems to run out of legs. Would this be caused by the diff ratio mismatch now? I am considering a 6spd getrag conversion, but maybe I can go to a 3.7 diff instead to resolve this? Not too mention it's cheaper.

Just seems like it wants that 6th gear now when your at the end of 5th.

Thoughts? Remember your talking to a diff/gearbox ratio n00b here. :whistling:

If you are running this in a GTR I do not think you will find a 3.7s set in factory form. If it were RWD only you could get a crown and pinion from a 200sx.

The effect would be a 15% increase in gear length. 100kmh would become 115kmh at the same revs, so on and so forth. If you are topping out at 260 it will give you the ability to get very close to 300kmh.

However, last I remember R32 GTR's have stupendously long gears to begin with ? :whistling:

dude top of 5th gear is well over 260 km/h? where on earth are you topping out 5th gear? and what mismatch? you still presumably have the same diffs and same gearbox you did with the RB26? and the engine should pull about the same rpm? when you say running out of legs do you mean it's not pulling hard at the top of the rev range? if so it sounds like you've gone backwards?!

BTW, 3.7 with a 32 box would give you an astronomical top speed. around 320km/h and you'd never get there. the car would feel so lazy. first gear would get you to about 80km/h, about 130km in 2nd gear.....

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • That is surely the biggest gathering of Stageas in North America, ever!
    • Remember kids - if you can't afford to buy 2 GTRs......
    • I know people cry at the price of the Getrag 12-14k for a conversion now, but it really is a nice mid point. Not going to get change from 10k on a gearset installed.  $30k++ for sequential.   I know you run the risk of a damaged used one and parts are hard to get but as a street car gearbox its really hard to beat. If you enjoy a more traditional manual, its the choice no question.     
    • Time to decide what’s more import, your power level or your budget because you’re going to struggle to keep both 
    • Our Southern Highlands Cruise is proudly registered with “R U OK?” Day.  Sometimes the best way to check in on your mates is by getting out for a drive together. Sharing a common passion like cars creates the perfect space to chat, connect, and support each other.  A simple “R U OK?” can make all the difference. Let's enjoy the drive, the company, and look out for one another. PLEASE WEAR YELLOW FOR “R U OK?” DAY Sunday 14th September 2025 9:30AM Meeting Crossroads Homemaker Centre 10:00AM Cruise Departure Via Old Hume Hwy 11:45AM Arrival at Mittagong RSL Club Meet Location: Crossroads Homemaker Centre Final Destination: Mittagong RSL Club *Disclaimer* There will be a lead and follow car so no one should get lost. If you would like to attend or bring others along please put your name down and a +1 as numbers will be needed prior! This is NOT a race and we will all be adhering to all road rules. If this is what you want please come to one of our many track days. This is an official SAU:NSW event and will be run under a CAMS permit. One of the things that really sets our club apart is our commitment to being true enthusiasts. When on normal roads we strive to maintain good relations with the authorities as well as the public in general. When attending one of Skylines Australia NSW events please try to: • Be aware of surrounding environment and act accordingly. • Drive courteously on the state’s roads as a true enthusiast should. • Understand how important it is to maintain the good name of SAU NSW and thus, treat others accordingly. • Any misbehavior will not be tolerated and you will be asked to leave.
×
×
  • Create New...