gearbox problems again..again..again

[jaffa]

after several rebuilds that i have paid for by good companies and hads a go myself i always have problems after 2-3 outings...and it seems to always be a second gear fault usually selector forks cracking or fingers snapping off...i wanna bury this problem now the only way i can see is if i fit steel selector forks...is this possible??? and getting them made?? up or does anyone know are they fitted in any of the later type boxes??? or this is an option??? what u reckon? cheers.
http://www.racecarsdirect.com/viewli...php?view=19674

ps done the jc5 route etc broke em all

[jaffa]

dont suppose any1 knows him???

Seller:LeystanFull Name:Craig StanleyCity:SwanseaCountry:United KingdomPhone:07886827169

[jaffa]

anybody got any past history of these??

http://www.swrmotorsport.com/main/new_page_3.htm

[Andrew Cooke]

anybody got any past history of these??

http://www.swrmotorsport.com/main/new_page_3.htm

I've spoken to him, he'd know if there is anything useful available, although he probably only does the newer Sadev stuff now.

That Avanti box is very close ratio, I don't think you'd like it.

compared to the standard speeds in gears of 37.4/62/87/119/148 that Avani box with the same final drive gives you 39.6/54.1/68.4/84.8/99.4 and for all that I doubt it's much, if any, stronger.

[jaffa]

yeah ur definatly right there andy wouldnt be really usable on the road anymore which i dont wanna go there...gonna speak to swr tomoz and see what/if they can do anything with regards to the selector fork ie making it stronger or steel? cheers.

[Andrew Cooke]

http://www.swrmotorsport.com/main/transverse_sadev.htm

that has the same ratios as the Avanti box, it's likely to be very similar. Note the sadev forks, maybe they will work with your box?

[jaffa]

i hope they can do something wanna bury this repeat problem now will let u know how i get on..just out of interest

[Andrew Cooke]

oops, that isn't like the Avanti, it's a dog box, and the avanti is synchro. I know Avanti do a dog box coz I spoke to them a few years back, from memory they did 3 different gear clusters.

[jaffa]

http://cgi.ebay.co.uk/Renault-JB3-cl...d=p3286.c0.m14

a bit cheaper lol on ebay

[Andrew Cooke]

http://cgi.ebay.co.uk/Renault-JB3-cl...d=p3286.c0.m14

a bit cheaper lol on ebay

A few years ago I'd have had that

[Adey aka Ewok]

http://cgi.ebay.co.uk/Renault-Clio-1...d=p3286.c0.m14

[Schakal]

dont suppose any1 knows him???

Seller:LeystanFull Name:Craig StanleyCity:SwanseaCountry:United KingdomPhone:07886827169

thats the owner of APD , i know him
good lad ,plenty of knowledge

[Ashy]

Have you got a spare fork / old one? Or do you have a photo of one? Just wondering what they look like and if it would be possible to make one?

[stuTHC]

Have you got a spare fork / old one? Or do you have a photo of one? Just wondering what they look like and if it would be possible to make one?

Im just thinking the same thing Ash

Jaf, when you strip yours out, give us a shout and ill take a look, we should be able to make a stronger one.
Will you be able to get hold of a new/undamaged one to get the dimensions from?

[jaffa]

got plenty old boxes so will rip one out winnner

[Andrew Cooke]

I think they're normally something like bronze so that they don't pick up on the gears, you may need to fit bronze pads in the steel forks. I'm sure you materials guys will have a better idea than me.

[Matt Cole]

titanium should do the trick!

[stuTHC]

titanium should do the trick!

ive got a decommisioned robocop in the shed, we could use a bit of his armour

titanium is a bit extreme, or should that be expensive. Loads of different steels available now that can be used with other steels in contact.

I do need to know what grade the gears are thou,
Are they cast or forged?
Andy?

[Andrew Cooke]

if you're serious about making forks I could ask one of the gearbox designers at work about materials, unfortunately I just chucked out all my old gears and forks, so wouldn't have anything to show him.

I'd guess that gears are made from "good ****"...

[Andrew Cooke]

titanium should do the trick!

never mention titanium to someone who sells it, you'll spend hours being made to look stupid about materials and come out of it none the wiser. Always use a middleman when talking about Ti

[Sparkie]

titanium picks up too easily (spalls), and is quite brittle. a good steel should be more than a match.

there endeth 3 years of materials science at uni.

[Andrew Cooke]

is galling(sp) different to spalling(sp)?

[Andrew Cooke]

is galling(sp) different to spalling(sp)?

don't worry, wikipedia to the rescue