Seized T56

[roverman]

Not in customs, run low on lube. Anyone rebuilt one of these ? I haven't pulled it yet. Should be a challenge, to pull apart. Thanks, roverman.

[Jim Stabe]

Art

I had to take mine apart to install a shifter relocation kit. It took me about a week of evenings to get the job done. PM me your email address and I'll send you a pdf copy of a manual for doing the job.

[DiDueColpi]

Just my two bits.
These tranny's use needle bearings so a "soft seize" generally is survivable as it just jams a syncro.
"Rocking it" from 1st to reverse will free it up with usually no harm done. You can pull it apart to check and freshen it up, or run it as is.
If it won't unlock then a major overhaul is in store. If this is the case and it wasn't of some phenomenal historical significance, I would look for another one.
Cheers
Fred

[roverman]

Thanks Fred, I shall look up the pattern. Historical  significance was former owners', bride to be, wasn't going to let him spend  another penny, to fix. Symtom was,he was driving along the hiway, and it went into neutral. I suppose when it cooled somewhat, it seized.  onward, roverman.

[roverman]

Great tip Fred ! You saved me 2.3 tons of work.  I "massaged"/no hammer, the shifter into all 7 gears, after adding 3 quarts of atf. Then I ran motor and trans together, without driveshaft. Note, 5th and 6th really makes the tailshaft vibrate, without the slip-yoke in there ! Fred, next time, lunch is on me !  Onwards, roverman.

[roverman]

Ok, What is the preferred lube ? I have Type III synthetic, auto trans lube ?  Thanks, roverman.

[MG four six eight]

Art,

If it's from a GM vehicle, the preferred lube is Manual Transmission Fluid GM part No. 88861800.

Bill