gearbox self rebuild
Turbo Mini Forums

hi
ive tried searching but cant seem to find anything,
im gonna have ago at rebuilding the gear box me self!
so what i was looking for was a list of things to definately replace and things i should make sure are in good working order!

its just gonna be a standard rebuild for my 998 turbo and a 4 pin diff from minispares!

thanks in advance,

martin

haynes manual is a good start
theres more detail in the metro version on G/Bs

you need to replace the 1st motion shaft bearing & double race mainshaft bearing also the two diff bearings.

the idler gear roller support bearings as well.

i may have forgot something ? anyone else

Edited by BENROSS on 10th Mar, 2006.

which oil pick up should i buy to use? just i know i should get a central one but which ones best?

cheers martin

cebtral ones best, also new baulk rings, lay shaft plus bearings.
but you may need new gear bearings.

always looking for them bigger bunches of bannanas

if i went the straight cut route what straight cuts should i buy? and what final drive? mines a rod gearbox!
thanks

my mini is a 1982 998 hl! so ill have a look but is it a case of replace it with the same?

Im planning to build up my next box myself.

A tip Ive picked up off various people and the net is to use the full track 3rd motion shaft (or 'mainshaft') bearing, not the 3/4 width one (which, i think?, is the std in A+ box).

Also, Ive heard that replaceing the idler gear bearing in the transfer case is often more hassle than its worth, been advised to leave it if there isnt too much play, especially if using straight cut drops as it cuts down on the the cogs tendancy to 'twist'.
The source I heard the above from said that no matter how you install the new bearing, they have a tendancy to come lose, overheat and fail.

Can anyone confirm/deny this?

Cheers

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

cheers

I would encourage you to replace every bearing in the case. You did not mention why you were doing the rebuild in the first place so is this just preventative maintenance?

just im building a 998 turbo and so need to have a good conditioned box, n rebuilt!

the minispares clubman gearset is excellent paul
great value for money & the ratios are just spot on
i run this set up and its fine

yours is a 998 i would run a 3.4 F/D in this.

please replace the idler gear tranfer case bearing then the jobs done right!

this is easy, no big deal at all.
the link below will show you how.

there are a few ways & all of them gets results!

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=6412

make sure its very clean before putting in the oven other wise you will stink out the kitchen lol.

always looking for them bigger bunches of bannanas