tranny or transfercase?

[P93suafilo]

Well I am in some very uncharted water and would really appreciate some help. I have a problem that I have run into with the good ole tan 89. I posted this to my build thread but thought I might get more people seeing this here.

Please forgive me if I use improper terms and if I do not describe enough then just ask and I will answer as best I can.*
So I have a 1350 transfercase doubled to another 1350. And I believe I have a M50d-R1 tranny. The problem that I am having only occurs when I am in 4wd lo/hi and when the doubler is lo/hi. But as I am moving forward it will feel as if it falls out of gear and then I will have no forward movement. Occasionally I will be able to reverse but then when I put it back into first there will be a clicking/winding/spinning sound as if it just doesn’ t want to go into gear. To fix this I have to shift the transfercase from 4wd to 2hi then back down and I will be good to go till it falls out again. Someone told me that it could be the syncros in the tranny but when I looked up those symptoms my tranny doesn’t have any of them. Any input would be great.*

 

[adsm08]

If both transfer cases have to be engaged I would think the problem has to be in one of them.

 

[RonD]

Yes, in the transfer case not transmission.

What are you using to shift both transfer cases?
Both manual or both electric, or one of each?

 

[85_Ranger4x4]

Make sure both are consistently getting into gear. Not quite into gear or too far past "in gear" will not work.

 

[P93suafilo]

So the set up on the actual transfercase, not the doubler part is hand shifted(under the truck, its how it came i am working on getting that better set up) and the doubler is a manual shift from inside the cab. I am pretty sure that I am turning the transfercase into the proper gear being that I will feel it click into position, i wonder if the lever that the PO had set up is incorrect or something like that.

 

[RonD]

Yes, my bet is that the linkage needs adjustment.

 

[Andy D]

I use a a little pair of vise grips wired in place to hold the 1354 in 4 high. I had to learn what was what. If I left the hubs unlocked, it would drop into 2 wheel . To prevent this the VG is wired in place with a piece of mechanic's wire. I also high lighted the modes and the point of the shaft with some white paint. left to its own devices , the TC will drop into 2 wd

 

[P93suafilo]

So from what I am gathering is that it's most likely a issue with the linkage. Would the fact that after it "falls out of gear" the lever stays in the same 4hi/lo position make it a different problem?

 

[Mightyfordranger]

Just a guess here but possibly a worn Shift fork may cause the problem it'll engage but won't hold it in gear same concept of a 5spd droping out of gear not sure how it all works but try looking at a few exploded views of both tcases and see how the actuators work for sure may just shed some light for ya

 

[P93suafilo]

So I'm gonna pull the tcase and check/swap the shift forks. On a scale of 1-10 besides removal how tough is it? And any pointers.