Holinger Sequential Gearbox...
- Thread starter Rishi
- Start date
Simmo said:
The way I understand it is:
If you want a reliable transmission in a GTiR running over 350 - 400 break you would be advised to get your gearbox rebuilt using a normal Quaife gearset but have gears 1 & 2 straight cut and if you really wanted to go mad the you could get the case Cryo treated.
Gears 1 & 2 being straight cut will relieve the preload on the input shaft and so reducing the need to use a case brace.
Rishi
Still waiting on some shims!
stevepudney said:
See i spoke to Quaife about this a while back and they just told me that their exaisting 1st and 2nd straight cut gears wouldn't work with the normal Helical Quaife... Not to sure why not but i may call Bernie tomorrow to see what the score is and to see if it can be done...
Rishi
Simmo
Member
Would it be a lot more to go straight cut with a synchro on all of the gears? Might alleviate pretty much all preload?
Also, forgive me for sounding completely stupid but would the only difference to driving a straight cut synchro box be the noise - i.e. you wouldnt have to drive the car like you would if you had a dog box?
Also, forgive me for sounding completely stupid but would the only difference to driving a straight cut synchro box be the noise - i.e. you wouldnt have to drive the car like you would if you had a dog box?
See i spoke to Quaife about this a while back and they just told me that their exaisting 1st and 2nd straight cut gears wouldn't work with the normal Helical Quaife... Not to sure why not but i may call Bernie tomorrow to see what the score is and to see if it can be done...
Not sure but isnt 1st Input gear part of the input shaft and not a seperate gear?
It would explain why the straight gears would be interchangeable perhaps.
Thanks
Paul
Not sure but isnt 1st Input gear part of the input shaft and not a seperate gear?
It would explain why the straight gears would be interchangeable perhaps.
Thanks
Paul
T
tro||
Guest
you only have a seperate 3rd, 4th, 5th input gear,
1st and 2nd use part of the input shaft, maybe thats the problem with the quaiffe
you can do 1/2 straight cut with the par though
1st and 2nd use part of the input shaft, maybe thats the problem with the quaiffe
you can do 1/2 straight cut with the par though
Last edited by a moderator:
i think ud be better talking to bernie as he actually is interested in talking to people where quiaffe are more interested in making money
i asked if it was possible to upgrade bearings in teh quaiffe set i had they just said no not interested kit is designed as it is any problems talk to bernie if it wa shim that fitted it originally
i asked if it was possible to upgrade bearings in teh quaiffe set i had they just said no not interested kit is designed as it is any problems talk to bernie if it wa shim that fitted it originally
Rishi
Still waiting on some shims!
Spoke to Gearboxman Bernie today…
First off… You cannot integrate the 1st and 2nd straight cut gears into the helically cut Quaife setup… Its just completely different…
The Quaife dog box hasn’t been made for sometime but was originally built for either Dome or TRUST JP…
As for the casing itself… Bernie hasn’t had the opportunity to really postmortem a gearbox with a Blown Casing… He did say that the ones he’d seen were from cars that managed to blow them from the likes of pulling out of junctions and things like that… Also that they were all using the OS Giken… Another thing he said was that he wasn’t completely sure it was the helically cut gears that was the problem… He said that it could be to do with the way the casing is actually fitted… Also that its breaking where 5th gear is and not 1st… 1st is at the engine side whereas 5th is at the end of the casing where its breaking although in theory it is possible that 1st gear launch could cause the casing damage…
But without being able to properly have a look he says that he knows just as much as man in pub…
So with that could someone please post up some pics of broken casings… One from Darrens car and any from Mo Jamal’s car as his was broken on 1st gear launch so that i can send them to Bernie as he has kindly offered to help...
Rishi
First off… You cannot integrate the 1st and 2nd straight cut gears into the helically cut Quaife setup… Its just completely different…
The Quaife dog box hasn’t been made for sometime but was originally built for either Dome or TRUST JP…
As for the casing itself… Bernie hasn’t had the opportunity to really postmortem a gearbox with a Blown Casing… He did say that the ones he’d seen were from cars that managed to blow them from the likes of pulling out of junctions and things like that… Also that they were all using the OS Giken… Another thing he said was that he wasn’t completely sure it was the helically cut gears that was the problem… He said that it could be to do with the way the casing is actually fitted… Also that its breaking where 5th gear is and not 1st… 1st is at the engine side whereas 5th is at the end of the casing where its breaking although in theory it is possible that 1st gear launch could cause the casing damage…
But without being able to properly have a look he says that he knows just as much as man in pub…
So with that could someone please post up some pics of broken casings… One from Darrens car and any from Mo Jamal’s car as his was broken on 1st gear launch so that i can send them to Bernie as he has kindly offered to help...
Rishi
Dooie Pop Pop
New Member
why didn' t you just look for the thread in the news section;-) the vid of it happening is on page 5 iirc
clicky
i didn' t dive straight in for underbonnet pictures, seeing a £3000 box go pop is not nice! after that it was all about the freezing weather and i ran out of memory stick doing the vids:doh:
clicky
i didn' t dive straight in for underbonnet pictures, seeing a £3000 box go pop is not nice! after that it was all about the freezing weather and i ran out of memory stick doing the vids:doh:
T
tro||
Guest
the helical cut of the main gears transfers loads towards the end of the box, i'd imagine thats why that end pops, wouldn't matter what gear you were in, the loads are still transfering the same way down the shaftRishiGTiR said:
Dooie Pop Pop
New Member
so you brace one end and the other pops out!
charming
charming
I put a picture of a blown casing in the gallery.
http://www.gtiroc.com/gallery/files/1/8/1/3/gearboxcasing.jpg
http://www.gtiroc.com/gallery/files/1/8/1/3/gearboxcasing.jpg