gearbox options

[Simon Waterfall Syman84]

looking for advice from the sprinting collective on gearbox options 

i had a few issues last weekend at Blyton the gearbox being one of them.

currently have a type 9 installed that is a standard box from a 1.8 CVH engined sierra. im thinking heavy duty 2.8 gear set with a long first. but if i have a possible bill of £8-900 for this what would people suggest if i added cash to that, Dont want anything super fancy and im only going to be in road going classes with this car so standard h pattern box some road use and sprints.

like this 

http://www.ebay.co.uk/itm/FORD-SIERRA-TYPE-9-HEAVY-DUTY-LONG-1ST-GEAR-FULL-SYNCRO-HELICAL-5-SPEED-GEARBOX-/152586718978?hash=item2386e08f02:g:r3sAAOSwCGVX-4sJ

or this heavy duty synchro

http://www.bghgeartech.co.uk/html/5_speed.html

also mentioned to me was windy for gearbox's and diffs any advice welcome 

cheers simon 

 

[graham frankland]

WHi Simon

I also suffered badly with my type 9 gearbox at Blyton

I normally get 1 to 2 years between refresh (synchro rings and bearings) this year I managed 6 events

I have tried to obectively collect info on why this might have happened this year

For a number reasons it is only this season I have been able to use the full power of a recent 205 bhp engine upgrade

This has definitely put the gearbox (5 speed straight cut Tranex year set) at the edge of its reliability profile

The major factors for failure are wrong oil, clutch drag and driving style ( too quick on the down shifts and not toe and healing during the changes)

The weakest point of the box that is the synchro rings which date back to the Ford Sierra days

I do not believe the add you have seen is really honest as the rings are sintered bronze or expensive coated steel ones which still fail but in a different way to the bronze ones

It really depends on your power output anything over about 220 hp will probably need either a dog box or a sequential gearbox

The cost of both of these options is considerable as the clutch and flywheel are likely to need upgrade also

If you do not have such high power the sensible option is to stick with the type 9, have it refreshed by a competent rebuilder, use the oil the rebuilder recommends and learn how to drive the car to minimise the stresses during the year changes particularly going down the box.

I have learnt this the hard way so I hope you find it helpful?

If you need more send me a pm with your tel no so we talk in more detail

Regards

G