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Greddy 6 Speed Gearbox Urgent Question

T88 ON BOARD
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T88 ON BOARD Mentor

T88 ON BOARD

Posted
Posted

Hi all,

Have a GTR R33 that is almost complete just waiting on a Greddy 6 speed gearbox that is being built,

It a full Dog Gearbox with straight cut gears etc...i have never had experience with this gearbox so...

My question is....

What is the drivability like ?

The Car wont be driven all that often But are u able to get to A to B without to much hassle?

Basically i want to know if its possible to drive the car 'normally' and change at lower rev's?

Any help at all...

Would be great to hear from people who have had this gearbox

Cheers

tony

NXTIME Grand Master

NXTIME

Posted
Posted (edited)

You could drive it around normally. However, it will be whiney, noisey and clunky to drive as it is a dog box with straight cut gears. You will also have to change gears more agressively as they tend to need to be smacked in with more force than a normal box. Too slow a change will result in crunching as the gears don't have the softer meshing like helicals have. The difference is akin to upgrading from a stock spring clutch to a multi-plate solid clutch.

Enjoy >_<

PS, rev matching helps

Edited by NXTIME
STATUS Grand Master

STATUS

Posted
Posted

I had to drive Mark Phillips fully blown drifter round with the dog box and i can tell you it was a piece of piss to live with, the TRUST ones are made by QUAIFE and are super strong except for reverse.... be very gentle with reverse as there were many compromises made to fit a 6spd gear set in a 5spd case.

T88 ON BOARD Mentor

T88 ON BOARD

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Posted

Thanks to the feedback people : )

Any addition information or experiences feel free to post up..

Oh and I forgot the mention the car is running a brand spanker OS Tripple plate

T88 ON BOARD Mentor

T88 ON BOARD

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  • Author
Posted
be very gentle with reverse as there were many compromises made to fit a 6spd gear set in a 5spd case.

When selecting reverse do i need to slowly select the gear?

Whats the go?

Angus Smart Grand Master

Angus Smart

Posted
Posted (edited)

I had a trust box in my car for quiet sometime driving around on the street.

its alrite once your moving. 1st you need to push hard to get into.

other than that i found it fine! very noisy which i liked!

not the best thing for using to drive but it isnt as bad as made out to be either!

When selecting reverse do i need to slowly select the gear?

Whats the go?

as said before they focused on making 6 forward gears with the trust/quaife box, so reverse is rather small. and does wear out it will round the corners off the gear which means it wil pop out of gear. (just hold in in reverse and you will have no problems!)

Edited by Angus Smart
Public Enemy Community Regular

Public Enemy

Posted
Posted
When selecting reverse do i need to slowly select the gear?

Whats the go?

i got a HKS 6 speed dog box. unfortuately i havent fitted yet so i can't give you any personal experience but the guy a brought it of gave me a few pointers.

1. you will have to be aggressive and forceful with it.

2. it is noisy and crunches

3. rev / speed matching helps alot. he spent alot of time watching the tach and speedo when changing

4. if you miss getting a gear you will most likely have to come to a complete stop and start again from first. (not sure why that would be the case)

5. reverse is very fragile. ensure the car is not rolling forward when selecting. If you rolling forward it will go into reverse and even if your just moving forward when you pop the clutch it will break reverse.

I would suggest if you have to park on a slop you park so that you can drive out rather than back out.

On another subject, does anyone know if you can flat change a dog box? I'm going to be running a Bee R style rev limiter for drags which is supposed to enable flat shifting, is this still possible with a dog box.

cheers

Angus Smart Grand Master

Angus Smart

Posted
Posted
i got a HKS 6 speed dog box. unfortuately i havent fitted yet so i can't give you any personal experience but the guy a brought it of gave me a few pointers.

1. you will have to be aggressive and forceful with it.

2. it is noisy and crunches

3. rev / speed matching helps alot. he spent alot of time watching the tach and speedo when changing

4. if you miss getting a gear you will most likely have to come to a complete stop and start again from first. (not sure why that would be the case)

5. reverse is very fragile. ensure the car is not rolling forward when selecting. If you rolling forward it will go into reverse and even if your just moving forward when you pop the clutch it will break reverse.

I would suggest if you have to park on a slop you park so that you can drive out rather than back out.

On another subject, does anyone know if you can flat change a dog box? I'm going to be running a Bee R style rev limiter for drags which is supposed to enable flat shifting, is this still possible with a dog box.

cheers

you can clutchless shift and i guess if your going to keep into it you could flatchange too but it may require some clutch assistance

about the missing a gear. it isnt really a problem. its just the same as any other box! you just have to try and select it again.

rev matching your gears is very helpful as you said. i actually had mine pretty good it doesnt take long to pick it up.

it also helps to say select 6th or a close by gear and then select reverse. as sometimes reverse was a bit tricky!

9krpm Mentor

9krpm

Posted
Posted

wow you guys are aggressive!!!

I've driven 2 cars in the past with dogboxes daily and it's not that bad unless you are stuck in bumber to bumber traffic.

First gear, clutch in and wait for the input shaft to slow down before you put it into gear. Upshift, just double clutch and shift into the nxt gear. Downshift will require a little bit of rev match and double clutch. If you get too much noise or pain in your left hand from the dog engagement....you are not doing it right.

YOU SHOULD ONLY CLUTCHLESS SHIFT AT HIGH SPEED.

Public Enemy Community Regular

Public Enemy

Posted
Posted
wow you guys are aggressive!!!

I've driven 2 cars in the past with dogboxes daily and it's not that bad unless you are stuck in bumber to bumber traffic.

First gear, clutch in and wait for the input shaft to slow down before you put it into gear. Upshift, just double clutch and shift into the nxt gear. Downshift will require a little bit of rev match and double clutch. If you get too much noise or pain in your left hand from the dog engagement....you are not doing it right.

YOU SHOULD ONLY CLUTCHLESS SHIFT AT HIGH SPEED.

Ah yeah double clutchin, good point. A must on down shifts. Better start practicing heal and toe driving lol.

Public Enemy Community Regular

Public Enemy

Posted
Posted
you can clutchless shift and i guess if your going to keep into it you could flatchange too but it may require some clutch assistance

about the missing a gear. it isnt really a problem. its just the same as any other box! you just have to try and select it again.

rev matching your gears is very helpful as you said. i actually had mine pretty good it doesnt take long to pick it up.

it also helps to say select 6th or a close by gear and then select reverse. as sometimes reverse was a bit tricky!

Cheers mate, the more pointers the better

Angus Smart Grand Master

Angus Smart

Posted
Posted
wow you guys are aggressive!!!

I've driven 2 cars in the past with dogboxes daily and it's not that bad unless you are stuck in bumber to bumber traffic.

First gear, clutch in and wait for the input shaft to slow down before you put it into gear. Upshift, just double clutch and shift into the nxt gear. Downshift will require a little bit of rev match and double clutch. If you get too much noise or pain in your left hand from the dog engagement....you are not doing it right.

YOU SHOULD ONLY CLUTCHLESS SHIFT AT HIGH SPEED.

yeah i did find the dog box best at high speed :woot: and the traffic was a killer

STATUS Grand Master

STATUS

Posted
Posted (edited)
i got a HKS 6 speed dog box. unfortuately i havent fitted yet so i can't give you any personal experience but the guy a brought it of gave me a few pointers.

1. you will have to be aggressive and forceful with it.

2. it is noisy and crunches

3. rev / speed matching helps alot. he spent alot of time watching the tach and speedo when changing

4. if you miss getting a gear you will most likely have to come to a complete stop and start again from first. (not sure why that would be the case)

5. reverse is very fragile. ensure the car is not rolling forward when selecting. If you rolling forward it will go into reverse and even if your just moving forward when you pop the clutch it will break reverse.

I would suggest if you have to park on a slop you park so that you can drive out rather than back out.

On another subject, does anyone know if you can flat change a dog box? I'm going to be running a Bee R style rev limiter for drags which is supposed to enable flat shifting, is this still possible with a dog box.

cheers

Have you ever driven a dog box? alot of what you have written is total BS

missing a gear does not mean coming to a complete stop for starters.

Edited by URAS

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