I need help on a 87 4x4

[96Indyram]

I have a 87 4x4 with the 2.9 V6 and the 5 speed manual transmission.
the transfer case is the manual lever also.

the truck started acting like the parking brake/ rear brakes were locked up.

I try to drive forward and i have to really give it hell to go forward, but in reverse it does fine.

I jacked up the rear of truck, put the truck in neutral ( 5 speed) and with t-case in 2Hi ...and I spin the rear tires by hand..they are free and turn easy ( alot of slop in differental)
but the rear drive shaft wont spin when I tried... I grab a big set of Pliers and clamp on it and it is real hard to turn.

I put the transfercase in neutral and the rear drive shaft spins free and easy, and turns the tires like it should.

In neutral with the engine running, i can push the clutch in and out and the truck will move slightly, and you can hear the engine rpms change.

I have a 84 4x4 with the 2.8 v6 5 speed, and manual t-case that I can swap out with if I have to.... I think they will interchange.

So I am thinking something is messed up /binding up inside the 5 speed .


Any ideas of what is going on?
Thanks Indy.

 

[adsm08]

Well the FM145 was a wonderfully delicate transmission, quite easy to break and quite hard to fix. Kinda like those puzzle balls.

Can you spin the drive shaft with the trans in neutral and the t-case engaged in 2-hi?

 

[96Indyram]

Well the FM145 was a wonderfully delicate transmission, quite easy to break and quite hard to fix. Kinda like those puzzle balls.

Can you spin the drive shaft with the trans in neutral and the t-case engaged in 2-hi?

No... with the t-case in 2hi and transmission in neutral it is really hard to spin using pliers.
But with both in neutral it will spin.

 

[adsm08]

Trans is FUBAR. If you pull the pan down you can probably see the problem.

 

[96Indyram]

Just great....lol

so will the Toyo Koygo out of my 84 swap in no problem?

If so I will just swap it out as one unit ( transmission and t-case) togther.

 

[96Indyram]

Or should I rebuild the fm145?
found this site for a rebuild kit
http://www.manualtransmissionpart.com/FM132.html

 

[adsm08]

The TK should work, but I don't know what all is involved in the swap.

As for rebuilding an FM transmission, well that is a lost cause. As I said they are overly complex inside, and the special tools that are needed (actually needed, not optional), well you can go buy a good M5OD and all the other parts needed for that swap for a lot less than you could buy the tools for, if you can find them.