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-   -   Raising 5th gear on an RA gearbox.... (https://www.scoobynet.com/drivetrain-11/166840-raising-5th-gear-on-an-ra-gearbox.html)

Tractor 13 January 2003 03:06 PM

Anybody know how much it would cost to have a higher 5th gear fitted to an Sti RA gearbox? Any ideas of where it could be done?

Many thanks

Mike

David_Wallis 13 January 2003 03:19 PM

Speak to John Felstead.

Adam M 13 January 2003 04:28 PM

not a lot of money.

depends what yours is right now.

if its a 0.82, then you can easily put in a 0.738 from any uk car or normal sti, this should give you 21.8mph/1000rpm instead of 19.8 assuming a 4.44 final drive.

Anyone who can strip a gearbox can do this for you.

fifth is the last gear to go in to the main box so it wont be that much in the way of labour.

Try calling town end garage or ring phil venn at barratts motorsport. They are both very decent gear box builders.

RRH 13 January 2003 06:24 PM

My gearbox man could probably sort it for you:D

dowser 13 January 2003 07:28 PM

Even better, I'll give you my gearbox and diff for yours? ;)

Richard
Euro my00 :D

johnfelstead 13 January 2003 09:13 PM

well i went the other way and have the 5th gear ratio you need sat on my kitchen table.

If you want it drop me a mail.

Adam M 13 January 2003 11:22 PM

john, after all your talk about having the best of both worlds, why did you put a 0.83 in there? :confused:

Tractor 14 January 2003 08:39 AM

Lads, thanks very much for the info.

Simon, cheers mate, we may have to talk about that ;)

John, I don't own the car yet, but when I do I shall give you a call. How much do you want for it?

Thanks

Mike

Chicken Man 14 January 2003 12:50 PM

Guys, I would like to do the same in my STi 5 type R. I presume this would be the same process/part as RA?

Anyone got a complete price for doing this i.e. has anyone had it done?

(Sorry to hijack your thread mate but price would be nice do you agree?)

[Edited by Chicken Man - 1/14/2003 12:51:26 PM]

Andy.F 14 January 2003 05:26 PM

Beware, some of the lowest geared cars actually run 3.9 diffs. The gears in the box are MUCH lower ratio.

My MY95 Ra runs 6500/4th = 92mph (from rolling road) This is the same as a UK 3rd gear!!!
The replacement Ra box (MY unknown) which I fitted shortly after I bought the car, was also on a 3.9 with the same ultra low ratio's.

If I fitted 4.44 diffs with my gear ratios, I'd be lucky to see 110 mph flat in 5th !!

Andy


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