gearbox crunch
Turbo Mini Forums

hi, i took a chance on fitting a second hand close ratio gearbox. fitted centre oil pickup, hardened diff pin and changed the final drive. also replaced the 1st motion shaft bearing as the race was broke

i should have taken this as an indicator to overall condition of the gearbox.

anyway, its fitted, i have a crunch up into 4th and down from third to second if going at any speed.

it will be coming out in the future, but what is likely to be causing the problem? am thinking worn baulk rings?

is it worth getting a whole recon kit from minispares or the likes? they are around 300 quid which is a fair whack, is it worth it? i guess i can only see the wear when the box is in parts. obviously some bearings will wear more than others.

the gearset is a series in an early a plus case. am i right in thinking i have to go with 'a' bearings?

thanks

yup new rings please!

AlexF

thought that was the case. wish i had looked at them properly when i had it in bits.

anything else worth changing when its apart?

If your only messing about changing odd bits you may as well just get a 998 and have the gearbox off that. I would eigher rebuild it completely or replace it with another.

Remember that by using the gearbox like this you WILL ruin the dog teeth on the gears and synchro hubs. Have these scrutineered properly and bin if necessary at the next rebuild.

whos to say that using a gearbox unchecked from another engine would be any good? i could end up going through a stack of them before finding something suitable.

i used this gearbox due to the ratios (close ratio laygear).

i am thinking maybe of building another a series box minus the laygear and then using the laygear ftom the gt one when i change them.

rebuilding is not a problem, it was to do with time and funds (parts for the engine cost me nearly 1k).

if i go for another a series gearbox, what years/casing number do i have to look for? or i could try to locate another gt box and build that for now#

i use the car daily and dont have time to change the gearbox at the moment and wont be likely to for some time.

cheers

As Vegard says by continuing to drive it will turn a rebuild costing £80 + gaskets into one that will be several hundred

Edited by Scruffy on 7th Dec, 2009.

On 5th Sep, 2011 Vegard said:
I stand corrected. You should know

if the gearbox sounds ok otherwise you probably wont need to desturb too much,

i'd change the layshaft bearings an 3rd motion nose bearing as a matter of course as they are dirt cheap, and of course the baulk rings.

cheers. thanks for the input.sugestions noted. maybe i can get some time off work in spring to get the engine out and sort the gearbox.

can get away without crunching second, 4th is not a huge crunch.

one more quick Q, whats best to go for, gen rover or minispares competition baulk rings? am thinking the comp ones, unless there is a good reason why i should steer clear?

If you are leaving it till the spring it won't matter what baulk rings you fit - the whole lot will be knackered - believe me if you deal with it now you might just get away without any syncro hub face damage if you leave it you'll need a set of hubs and forks as well!

On 5th Sep, 2011 Vegard said:
I stand corrected. You should know

i know it is not ideal and i would start to take the engine out tomorrow to sort this if i could.

unfortunately i use the car every day, i live and work in bristol, and i need it for my comute to work there. i dont have facilities in bristol, so can only undertake the work when at my parents in wales.

as i work full time, and hell of a lot of hours, its not going to happen this side of xmas, certainly.

if when the time comes parts do need replacing, then so be it. as much ias id like to sort the problem now, im unable to do so.

also, the gearbox has done unkonwn mileage. for all i know it may have been driven like this for tens of thousands of miles, in which case the parts would already be knackered.

all i can do for now is try and sort out a time as soon as possible so that i can address this issue, and look at getting hold of the parts that i know i will need, ie baulk rings. will be putting an order in this week with minispares for some parts i need for my project car, therefore would like to add these to the order too, hence my question 'which is best/more suited?'

its not an ideal situation but it going to have to stay this way for a little while yet

Bung in a 998 engine? I've managed an engine change single handed from driving in to driving out in 7 hours (mabie less, can't remember now, that was because I had work the next day)

Edited by minimole23 on 9th Dec, 2009.

nah, will hang on til spring, maybe jan when i can get the time off. chengine engines back and forth only makes more work. besides it an mpi. it will only take me an extra day to sort the gearbox.

all i need to know is what parts i should ideally get ready.

-which baulk rings? -gen rover or minispares competition?

-what bearings shall i chenge routinely (am thinking all of the needle roller bearings) - i roughly priced these at around 80 quid.

the layshaft had some very minor pitting on it when i last looked.

what replacement should i go for? stardard or a competition one?

thanks

If a dodgy box to start with then best bet to source another and rebuild that. This way you will not be stuck for bits on what is your daily driver and will make it a quick swap over

Edited by Scruffy on 10th Dec, 2009.

On 5th Sep, 2011 Vegard said:
I stand corrected. You should know

as stated, the box is perfect apart from the worn syncros.
it will take me a day to sort this box once the engine is out, maybe two if i have to order any other parts.

im using this one as i wish to use the cr gearset. have also fitted a hardened diff pin, my desired final drive, also already changed the 1st motion bearing.


i really just want to know what baulk rings i need (gen or comp), if i should use a comp layshaft and if i should replace the roller needle bearings routinely as part of the strip down.

to be honnest i think i will use new roller bearings, a comp layshaft, just need to know about the baulk rings really - does anyone know how gen rover compare to minispares competition? has anyone had experience of the competition ones? are they suitable for road cars?

Edited by welshdan on 10th Dec, 2009.

No it is on its way to being completely f**ked. Just think of the lumps of swarf and bits of broken syncro hub that are circulating around your engine and gearbox -going in between gear teeth and needle rollers etc. Do you think that each time it crunches you are just getting a few filings of the baulk rings? Eh no!!!!!!!

The competition baulk rings are out of stock so decision made for you!

On 5th Sep, 2011 Vegard said:
I stand corrected. You should know

no need to worry about these things. will have to have a look at the components when i get it all appart...

and sort it out from there

Edited by welshdan on 10th Dec, 2009.

yea, it will be when i sort the box out.