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2nd gear getting stuck
Posted: Sun Nov 18, 2012 8:58 pm
by Bretto
Here is a strange one. I went out for a drive today and found now that 2nd gear gets stuck and locks in place if I come to a stop with the clutch pedal pressed in while its in 2nd. So I am unable to move the cane to neutral to go to 1st gear to start out. Now if I make sure to pull it into neutral before stopping obviously I'm good. I can shift in and out of 2nd fine if I'm on the move. With the engine off and stopped, it doesn't matter, it shifts in and out of 2 with the clutch or no clutch engagement. I mimicked the situation in the garage with the transfer case in neutral and drove the transmission thru the gears and got the same symptom in 2nd. I have the inspection cover off so I can watch the clutch. As soon as the the clutch disc stops spinning, while in 2nd, I can't pull it out. Then I engage the clutch to get it going again and if I release the clutch and pull the cane before it stops, I can get it out of second.
Anyone ever heard of this symptoms before? For some reason, I want to point the finger at something in the synchro system, like maybe those 3 small dog pawls aren't moving or getting bound up. I don't know.
Oh and it's nothing in the shift tower, it moves smoothly and I also verified the forks are positioned right. Rev, 1st & 3rd function fine.
Posted: Sun Nov 18, 2012 9:34 pm
by frankthecrank58
in tm9-1804b pg 20 para 13 section e describes your situation somewhat and maybe it's what's going on in your tranny. i thought synchro right away and the manual suggests it along with other likely causes. check it out. hope it's an easy fix.
Posted: Mon Nov 19, 2012 8:29 am
by Bretto
e. Gearshift Lever Stuck in Second or High Gear.
(1)Bent second and high shijter shaft. Remove and replace
damaged shifter shaft.
(2) Defective second and high speed synchronizer assembly. Remove
and replace defective synchronizer assembly.
Thanks for the reference Frank.
Sounds like the problem. I just fixed a front bearing leak and now this. Joy. I'm beginning to think that my new hobby is pulling the tranny. I got it down that I can remove the tranny & tcase in less than 1hr from the bottom. For some reason the part I hate the most is pulling the driveshafts.
Let me ask this, having not ever driven another single vehicle with a T90 to compare to, will the 2-N-3rd transition be a little tighter feel than compared to r-n-1st? I realize its a whole different mechanical set up between the 2. Mine always seemed a little snug. R-n-1st is like butter
Posted: Mon Nov 19, 2012 9:10 am
by wesk
Clutch drag amounts and gear spin down have a lot to do with shifting feel. Of the twenty or so T90 boxes I've driven over the last 45 years 1-2 has always seemed a wee bit tighter then 2-3. Unless of course the synchro is on the way out. Then moving into third from second often meets a bit more resistance.
Posted: Mon Nov 19, 2012 9:12 am
by whydahdvr
Good to know.
I don't know if anyone watches Wheeler Dealers on the Velocity Channel but I just saw an episode where they bought a Willys MB WWII jeep in CA and shipped it to England. They had an issue (crunch) when shifting into 3rd and replaced it with a newly rebuilt tranny from some vendor in CA. It was interesting and I was wondering if they had hit up any of our MB/GPW or M38-type sites for more info.
Posted: Mon Nov 19, 2012 3:37 pm
by Cacti_Ken
A few years before I even thought about storing the M38 I did some work on the transmission. After I put it back together it would not shift at all unless I put a lot of force on the shifter. Once I got it to shift, it was still tight. I used it like that a few years. Then I got into restoration mode. I disassembled it again and found one of the syncronizer plates had come out of it's position.

Posted: Mon Nov 19, 2012 8:33 pm
by Bretto
What are you showing out of place? Is the spring on the outside of the pawl?
Posted: Mon Nov 19, 2012 8:49 pm
by Cacti_Ken
The 2nd photo is showing the part (the small plate) just one of them, that was causing the problem. In my case, one of the plates had some how moved forward out of the position it should have normally been in.
The 1st photo is where it is normally installed. The plate being out of position caused the 2nd&3rd gear sliding clutch to bind up.
Your second question about spring, I'm not sure what you are asking.
Posted: Mon Nov 19, 2012 9:19 pm
by Bretto
I was thinking you we're saying the plate in pic one was out of position. I was trying to figure out how that was since it looked right. I thought I might of seen the spring that keeps them in place out of place. It almost looks like a spring wire there at the end of the plate on its right end.
Posted: Thu Nov 22, 2012 2:10 pm
by Bretto