• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

Gearbox to Engine Bolts

Share this page

rlandrum

rlandrum

Jedi Trainee
Offline
Since the engine was already out of my TR3A when I got it, I don't have any of the mounting hardware that holds the engine and gearbox together.

According to the Moss Europe catalog, there's 5 different types of fasteners used to hold them together. I googled to get the sizes and threading...

3x TE505111 (Stud 5/16 x 1-3/8 UNC - into block)
6x GHF163 (Bolt, 5/16 x 7/8 [25mm] UNC - into block)
2x GHF120 (Bolt, 5/16 x 3/4 UNF - clutch shield)
2x GHF103 (Bolt, 5/16 x 1 UNF - for slave cylinder)
13x GHF332 (Lock Washer, 5/16)
2x GHF202 (Nut 3/8 UNF - for starter)
2x GHF333 (Lock washer 3/8 - for starter)
2x BH606161 (Bolt 3/8 x 2 UNF - for starter)

Strange that the 5/16 UNC nuts for the studs listed above aren't included.

Does anyone know of a kit, or perhaps a list of Moss US or TRF part numbers for the various bits? If not, I guess I'll be putting it all together as I go.
 
The original studs were mixed thread; so they took UNF nuts. Don't know about the replacements supplied by either TRF or Moss, tho. Also, you'll need longer studs if using a later gearbox, as the flange got thicker.

There are some other nuts missing from that list as well, since the 4 bolts through the dust shield (two of which also go through the clutch slave mounting bracket) also get nuts & lockwashers.

And don't forget the two dowel pins, DP612 @ TRF, that locate the gearbox to the engine.

All of the bolts, nuts & lockwashers are nothing special; ordinary hardware store stuff will work fine. I generally buy them by the box from MMC or equivalent.
https://www.mcmaster.com/
You can use Grade 5 or 8 if you want (lots of folks feel better that way), but IMO Grade 2 is fine in this location. The aluminum gearbox flange is much weaker than the bolts anyway. If something breaks, it will be the flange away from the bellhousing (which is why it got thicker on later gearboxes).
 
Back
Top