Thread: Gearbox's

You do not mention Series (II/IIA/III).

However, the boxes are interchangeable, however you may need to swap your 6cyl bellhousing over to the 2.25D box.

Originally Posted by isuzurover

You do not mention Series (II/IIA/III).

However, the boxes are interchangeable, however you may need to swap your 6cyl bellhousing over to the 2.25D box.

They are both IIA sorry about that

cheers

While we are on gearboxes, my 67 IIa pops out of thîrd gear when you back off at about 30 MPH - when I remember I can hold it in gear as I back throttle off. Is this something that can be repaired easily?

Originally Posted by happydad59

While we are on gearboxes, my 67 IIa pops out of thîrd gear when you back off at about 30 MPH - when I remember I can hold it in gear as I back throttle off. Is this something that can be repaired easily?

That is either:
1. Worn synchro hub
2. Worn mainshaft or layshaft bearings (if you hold it in 3rd and go on and off the accelerator does it move back and forth?)
3. Detent problem (e.g. broken detent spring).
4. Loose nut on back of mainshaft (pull the top cover of t-case and check).

None are overly difficult or expensive to fix (yourself), but 1 and 2 will need the box removed, and if 2 then a complete rebuild may be needed.

Originally Posted by SMASH

They are both IIA sorry about that

cheers

I have never worked on a 6 - so can't remember if they have a different bellhousing.
Check the bellhousing bolt patterns and spigot/input shaft length and diameter (bush end). If they are different you will need to swap bellhousings between boxes (easy to do).