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Blown a RB20DET 5spd, What should I do now

VLRB20DET

By VLRB20DET,
in Engines & Forced Induction

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VLRB20DET Collaborator

VLRB20DET

Posted
Posted

Ok I blew my RB20DET 5spd man box at local drags using slicks

Whats the best way to get strengh so this wont happen again

now im contemplating in either using a RB25DET 5spd as they are supposed to be stronger than the RB20DET unit, Also will my RB20 clutch (exedy HD) be ok to use with the RB25 box??

or is there any auto boxes that are strong that will work, like RB20 or RB25???

I just dont want to go back out again and destroy another gearbox on slicks...

R31 POWER Mentor

R31 POWER

Posted
Posted

Do in this order

1.Bin RB20det box

2.Laugh at how small it is

3.Find RB25det box

4.Admire it's fatness and giggle like a school girl

But seriously it will bolt to the RB20,use the RB20 flywheel/clutch,you need to mod the gearbox mount with some flat bar,use R33 slave,shifter and the yoke or vlt yoke.Speedo,if it's cable I hear a cut down?vlt sender could work

Coupe-This Grand Master

Coupe-This

Posted
Posted

How much power are you making, and what sort of rpm did u decide to dump the clutch at? Are you wanting a straight bolt up gearbox, im guessing you have an rb20 in a vl? what about the mx7? rb30et gearbox. You could always get anything, just depending how much money you want to spend. You could go all out and get a tremec tko 6 spd :rolleyes: haha

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

MX-7's are weak as shit too.

they are soo old they just shatter. I've seen heaps die here in Vic.

Mine, and a mates.

Get an RB25 box and you'll be fine. Just make sure you get a yoke with it.

Skyrine-Dave Mentor

Skyrine-Dave

Posted
Posted

whats the point of a yoke when they are pressed and seal uni joints and have to be scrapped???

I got a yoke with my 5psd but when i took it to the driveline place they said they couldnt use it. I think i ended up getting a suitable Mark William "V8 Supercar spec" yoke with replaceable uni joints for SFA

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

you can use em. I need one for my 25box to fit to my car.

tierh that or its the driveshaft... so i got both. :rolleyes:

been a while since my workshop has done a 25 box... as usually cars aint POS's like mine... hehe

50FFT Community Regular

50FFT

Posted
Posted

i am in the middle of the same gearbox convert. All boxes seem to be from $1500 to $2000. The yolks as far as i know can be blended with the standard uni. I have a friend who did this convert and thats what he did and it seemed to work. Not 100% sure but thats what he said.

Coupe-This Grand Master

Coupe-This

Posted
Posted

Are you guys still talking about a second hand box???

Why bother putting in a box that has had the k's wound up on it already, and god knows how that was treated. Why dont you just get a box and rebuild it properly with all new bearing cogs, the lot. Of course strengthened parts. Might cost more, but hey, for that peace of mind ...

and mx7's arent that bad, i had a vlt gave them thing so much shit, was on the way out when i got it, and was still going 18 mths later. with plenty of flat changes. haha

RB30-POWER Mentor

RB30-POWER

Posted
Posted
From what I have heard they are the same strength but the RB25 Box has much better designed syncros.

Yeah, I would agree with that completely, thats what should have been said in the first place by the other users.

;)

Skyrine-Dave Mentor

Skyrine-Dave

Posted
Posted

Tizzle,

32702 - 02G17 pinnion assembly

If they ask what model car say Navara. shouldnt cost more than $26

I got mine from Metro Nissan at Windsor... Those guys are complete wankers in my opinion.. Good luck ;)

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