125cc pitbike jammed in 4th gear - Cars & Trucks

2wd right?(1995 is GEN1, T100)
auto trans or manual trans no told and both are told.
we can't guess drivelines blind,so tell it.?
2.7L, 3.0L and 3.4L engine options new.
toss coin land on A/T box. (most common )
the TCM decides all this not you,
the Tcm/Pcm/or TCU are all transmission brains , the PCM does engine too, and tells the TCM speed, and engine loads (hills etc)
rpm based on all that and gear ratio, in the transmission, 1:1 or overdrive. too and the axle ratio and tire size (circumference)
are tires stock, or low rider tiny.???????
5 speed manual or 4speed automatic and 4 engine choices not one told and if an automatic the TCM is turned to all things stated above.
a hard fact that. the RPM drips in OD ,overdrive and TCC lockup
the service manual lists 5 transmissions
A340F, A340H, A440, A442F and A343F units
top 2 are A340e & A340f (USA answers me) 2wd/4wd

A340F (30-40LE) 4speeds + tcc

seen too on
2000-2004 Tundra (4x2)
A = Aisin-Warner Automatic.
340 generation 3. 3L v6 used.
E=electronic shifted (TCM brain
F= 4wd same as E shifted.
3 electrically controlled solenoids for shifting and torque converter(TC) lock up(TCU runs the SHOW)

There is s TV cable here too, that causes upshifts late or early.
super hard top find this, Asian boxes. but here goes.
?1st: 2.80
?2nd: 1.53
?3rd: 1.00 (end to end lockup , look ma' NO gears here !)
?4th: 0.75 (23-spline, 0.705 21-spline
4th gear cam be less on smallest engine.(less rpm drop)
now you learn vast version of transmissions exits.
I read the side of box and it tells me the model there fully, every time.


so are you not getting 4th gear OD or the TC lockup failing
scan the PCM see if there are P07xx errors"? tranny errors. ?

in 3rd gear the RPM is the axle ratio and tire diameter (pi X r squared is circum and distance moved is that)

I can tell you the math below see the online calc. at end here.
and some TC slip. (it slips not locked up)
4 gear is RPM ,= is 0.75 x 3rd gear RPM. and tc slip.
TCC lock up is is less RPM but that depend slip and hills.
that is why I call them slush pumps, TC SLIPS and turns HP in to wasted heat and is why TCC was mandated by the EPA, for more MPG, and less waste.
that is how the pump slips as they say.

why not just see if all gears work (count them with easy right foot on flat earth)
and TCC locks up, in 4th
and scan the PCm for errors.
1,2,3,4+TCC is really like 5th speed, if you noodle that.
4-1/2" gear,(5th) locked.
make sure TV cable not rusted and jammed up and for SURE not jammed in the Pulled out position, rusted, there. and is WOT
wot is wide open throttle and that make the tranny shift way late
or never goes past 3 gear... test it.(or worse 2nd)
I see folks put a new transmission $2500 for the want of $20 cable.
wow. that. The TV cable bad is an on car fix.
P0750 to P0770 are all tcc errors to the box. scan it if gears ever shift wrong. and speed sensors failing or clutch packs slipping in the box,will dtc code out too.

so in 3rd gear the axle 3.4L auto T100 4x4 should have 4.30 gears.
so 1:1 x 4.3 is still 4.3 so 3000 rpm the read prop shaft.spins

at 3000 rpm and axles spin 698 RPM( AND TAD LESS TC SLIPS.)
knowing tire circumstance or diameter. nets speed.
manual trans runs 4.10 axles. (and no slip at all)
if not running stock tires the SPEEDO lies to you.
taller large tires spin slower and VSS lies. to cluster.
called ticket getter
235/75R15 (stock'ish)
Diameter : 28.9"

here is 4.3 axles.
3rd gear, 60mph , axle above 28.9" stock tires
is 3000 RPM
so shift to 4th, be on flat ground and light right foot and not hills]
and TV cable not JAMMED (rusted and locked out)
https://purperformance.com/p-29669-rpm-calculator.html

so 4th OD is, what .75 x 3000 is 2250 RPM (my guess never seen)
TCC locked up ,is less RPM, a bit.

so learn to scan any TCM(PCM) when gears fails.
scan it. now.

You most likely have two problems. 1. The throw out bearing is probably bad, and 2. This has caused some gear shearing within the gear box. Best fix is to have the gear box removed, cleaned, check for chipped, cracked gear teeth, and replace with good gears. Also, check the synchronizer , make sure it is in good working order.

its likely your throwout bearing is stuck its on a shaft that lets it glide back an forth . soon you wont be able to turn the engine over at all as it will now rust or jam.
when they replace it they will need to polish the shaft well or will happen again.

5 speed

is it still on the bench>????????
i rebuild many

1: the bearing in the front is bad.
2: the tranny is locked, bad shifter rail, detents
3: 4th gear is not a gear, it just locks themain shaft.
so if in 4th gear and input is jammed, that means
the cluster is jammed. if the cluster jams for any reason
it will be jammed in neutral. too, because the cluster always spins.
bottom counter shaft is called cluster. to old folks.

tell me , with the lid off tranny box.
did you test all gears, by moving the collars 1 by one.?????
each gear,? if not why not.????? never skip this step or fail big time.

then test all rail detents to make sure they all work(lid off)
and never allowing 2 gears selected at once (job1)????

then put in a new shifter sheet and try all gears on the garage floor,
all assembled!
then turn input by and and shift all gears on garage floor
i even use a huge drill motor to test tranny on floor, with tape on tip
of pilot shaft. and shift all gears,

this is all basics, , never just throw it together, do the tests.
as you go.

this one is close,
http://www.fixkick.com/tranny/5speed-rebuild.html

Forth gear is when the input shaft is connected directly to the out put shaft by the sliding dog. 2 possible reasons 1 the pall that holds the selector shaft in position is jammed from possibly a broken spring ( remove the plug in the side/top of the box if you have one) or the connecting dog has broken a synchro ring and this is not allowing it to move back. It is possible that the inter connecting pin that prevents too shafts from moving at the same time is stuck as well.

I'm sorry but I believe you have this posted in the wrong product category? Please re-post the question in the proper category if this is the case, otherwise you have my apologies. This is the car and truck problem category

Could be a problem with the selector shaft in the gearbos one of the ball bearing spring loaded locks has jammed up ,check the linkage first in case the gearchange mechanism is faulty

the greabox is worn out

i bet it has been making a growling noise for a while ? Whats going on now is the main shaft bearing has siezed on the shaft and or broke the shaft ,your best bet is to find a used tranny fixing your will cost more then a used one

There are four probable causes when the gear is stuck in one position, and they are precisely explained in this handy diagnostic article that I know will help narrow down the culprit of your difficulty:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Transmission_System_Stuck_In_One_Gear.htm

Good luck!
Brad