pectelboy

being out in the cossy mk2 today and noticed up the box no problems but down the box from 5th to 4 dont seem to go in but go into 3rd then 4 no probs can anyone shed any light

750hp escos

yeah its what is known as bulking as the bulk rings are worn..

Get it out and get a service done on it mate..

Gearbox man (cts) charges around £575 all in picked up and delivered to do a complete strip down and rebuild..then all will be good!


cheers danny

Turbosystems

iTrader: (5)

first thing I'd check is your prop shaft lengths if you are using a live axle

pectelboy

thanks danny how much just to do the bulk rings any idea

Turbosystems

iTrader: (5)

4th gear syncro can be done without a box strip just remove the input shaft
common problem is damaged shift plates digging into the syncro ring

pectelboy

Tony why the prop ?had it made the the right length ,then think it had a couple of inches play ,so it done buy a guy who worked for gkn driveline motorsport division

Turbosystems

iTrader: (5)

too long a prop cab cause the main shaft to be pushed forward with axle movement
which can cause gear selection issues
seen it before
easy enough to check

pectelboy

thanks for that mr moan

750hp escos

either way get it sorted by a proper gearbox man..

Ps unless the prop is pushed right up against the back of the box then it wont cause a problem..


cheers danny

William MK2 Cosworth

I'm using a T5 box, and before I lowered the back end of the car, it was acting up through the gears. this was caused because the front joint was at an angle, and after lowering the back , and the joint straightened out, it was fine.

IMO as Turbosystems suggests have a look at the prop but when the car is on the floor

RS500/364

Get the box rebuilt peace of mind and check the other bits £400 £450 though Ahmed !see my signature

Turbosystems

iTrader: (5)

the axle and the engine move the correct tolerance and clearance is a must

opposite lock

iTrader: (3)

I recently had my gearbox serviced T5 £209.00. Phil Peacock Transmissions ex Boreham guy.He has built thousands of them apparently CM1 postcode.

pectelboy

thanks guys its perfect except comeing down from 5 to4 but will look at the prop when its on the ramp for mot thursday, thank for all replys have drove it over a year this has only just come to light ,thanks again guy

Turbosystems

iTrader: (5)

this is most likely the issue