GearBox CHRUNCH? any tips to put in ???

[Macca177]

Well just came back from a forby..... basiclly i got a flat(Dam mud in alternator) and did a reverse hill start to get goign again...all was good till i went to reverse at the servo to air up me tyres after... reverse goes in then CRUNCH!!!!!smooth CRUNCH then smooth then crunch again!


all other gears seam fine.... alothow there is a slight knockin soudn cumin from the rear end with clutch in or out at any speed. Any ideas?

well i thinks i may have stripped sum teeth off the reverse gear. sound likley to those who have dun it before? im gussin my options are...New box...reco box....or get rid of the lux altoghter!!!
bawsiclly how much are they worth 2nd hand and new.and where should i start lookin for a gearbox?

I have read in sum other threads that its either a g52 or g51? or sumwhere there... it says on engine plates that i carnt read as its all worn off! how can i find out wot i have....its a 2.8d ln106 single cab 5 speed manual!

i went threw other previous posts so sorry if this is a Tonka.... its 2.17 in the mornig gettin tired!
thanks In Advance...
p.s sorry bout the bad spelling!!!!!

[dumbdunce]

sounds more like you've knocked half a tooth off your differential crownwheel.

jack up the back and turn the wheels while an assistant holds the tailshaft. if you can feel the notchiness in the wheels/tailshaft, drop the diff oil, if the diff is broken there will be pieces of tooth stuck to the magnet in the drain plug.

you should be able to pick up a diff from someone on this board for anything from $100 to $500, otherwise to have yours rebuilt with new gears is around $700 and up.


cheers

Brian

[Slayer]

if the problem was in the diff wouldnt it be happening in forward gears aswell?? he says its only in reverse and that all other gears seem fine, that would pretty much pinpoint the problem to the reverse gears in the box...

[Ryan]

yer and when we loaded it up in the servo (ie put it in gear and let clutch out while on the breaks) the noise happened and the tailshaft wasnt spinning,

[Rorza]

My gearbox is lose when you change gears is this normal? it not a problem

[ozy1]

just drain the gearbox oil, and if theres anything broken, it SHOULD come out in the oil, if not, take your chances, and strip down your box

[Macca177]

well yeah its just revrese... ive made sum inquires into a 2nd hand box.... mite go with this option. also if i do change it is it worth fixing any other problems while its all out...like rear main seal? and service or even purchase a new t/c with geras etc ?

[dumbdunce]

if the problem was in the diff wouldnt it be happening in forward gears aswell?? he says its only in reverse and that all other gears seem fine, that would pretty much pinpoint the problem to the reverse gears in the box...

normally I'd agree, but he says:

all other gears seam fine.... alothow there is a slight knockin soudn cumin from the rear end with clutch in or out at any speed.

which leads me to believe he's knocked the overdrive side off a couple of crownwheel teeth and the clunking is so far only very pronounced in reverse.

if thjere are reverse teeth busted off in the gearbox some of them will be attached to the drain plug magnet. since the W and G series gearboxes used in hiluxes do not have a constant mesh reverse idler gear, if the problem was with reverse there should be no noises in forward gears.

I could be wrong. its cheap and easy to check the diff before dropping the gearbox on suspicion

cheers

Brian

[dumbdunce]

yer and when we loaded it up in the servo (ie put it in gear and let clutch out while on the breaks) the noise happened and the tailshaft wasnt spinning,

ok, now that sounds like a broken reverse gear bits.


drop the gearbox oil, look for chunks.

[Macca177]

thanks for ya help all

found a 2nd hand box so guan try this and hopefully all is fixed

[Macca177]

ok got my gerbox today ...guan go in on friday...is there any tips or tricks to know? or its all pritty straight forward. guna do rear mian seal and new clutch as well.

thanks again