Blown a RB20DET 5spd, What should I do now

[VLRB20DET]

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]

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]

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 haha

[R31Nismoid]

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]

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]

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.

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

[VLRB20DET]

so you guys are saying the RB25DET 5spd is stronger than a VLT MX-7???

Yeah I actually have a VLT tailshaft laying around so Im right there,

Anyone know how much approx I will pay for a good RB25DET, 5spd??

[Tizzle]

question for r31power, im curently chucking a rb25det into my 32 which had a rb20de and i have encounted the problem u are talking about where my speedo is cable but the gearbox is not... what solution do u sugest???

[RedDrifter]

Have a look for a thread done by Clint32.

He's done this conversion to his R32 and tells you how to do everything.

[50FFT]

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.

[Skyrine-Dave]

1. nissan navara speedo drive

2. remove electronic speedo from box

3. insert nava speedo drive

4. screw cable driven speedo into navara speedo drive

[Coupe-This]

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

[sproosy]

RB25 Boxes are as strong as anything. They shit all over an MX7. They are the same as a GTR box just no transfer case so they can handle a lot of abuse.

[RB30-POWER]

RB25 Boxes are as strong as anything. They shit all over an MX7.

Can you explain how it shits all over the MX7 in technical terms, or are you just talking crap?

[RedDrifter]

Can you explain how it shits all over the MX7 in technical terms, or are you just talking crap?

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

[Tizzle]

dave, u wouldnt happen to know what model navara would u???

[RB30-POWER]

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]

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

[Tizzle]

32702 - 02G17 pinnion assembly

is this the part no.???

[Skyrine-Dave]

sure is