4th gear problem!

[ranz]

i just finished doing my 5 speed transmission rebuild kit that i bought from Jacks Transmission and i installed the new QM 7.25 twin clutch at a local shop, now i am facing a problem only when driving which is that i can not go into 4th gear when downshifting from 5th ( ex: 4th-5th-4th) or if i was 4th then neutral then back again 4th. anything else is working fine. this happen only when driving.
any ideas?

[ranz]

i wonder what will cause that?

[phoreal]

maybe the shift fork or the synchros arent timed right?

[ranz]

the QM is push style and use hydraulic release bearing.
can it be something in the 4th synchro, although i can shift from 3rd to 4th smoothly?

[Monstergarage]

do you have a stopper for your clutch pedal.

[ranz]

do you have a stopper for your clutch pedal.


no i didnt put one, but i lowered the pedal to have less pedal travel for less stress on pressure plate.

[ranz]

do you think its much of a clutch problem than something in trany?

[Monstergarage]

do you think its much of a clutch problem than something in trany?
if you have a problem just with 4th gear, i will say is your tranny.

[ranz]

that what i was thinking off.
any clues what in tranny will cause that. i mean going from 3rd to 4th is smooth, but going from 5th to 4th it does not come in as if it is locked or something. it will go if i just go 3rd then go 4th while clutch depressed.

[Monstergarage]

is your return synchro.

[ranz]

if it was return synchro then it shouldn't let me go from 4th to 3rd then to 4th right? can u elaborate more please

[ranz]

it doesn't grind or make any sound while trying to engage 4th gear when downshifting. it just doesn't go through it as if it is locked.

[ranz]

?