Gear box bell housing alignment (dowels)

[Gelf VXR]

I've seem forum posts here and there regarding aligning the bell housing on GM small blocks using a dial gauge and offset dowels, but nothing solid referring to LS blocks, is it still required for LS Blocks and bell housings? If changing the block

[MyM8V8]

Gelf VXR said:

I've seem forum posts here and there regarding aligning the bell housing on GM small blocks using a dial gauge and offset dowels, but nothing solid referring to LS blocks, is it still required for LS Blocks and bell housings? If changing the block

Can't see why if its a stock GM block and no custom machining work has been done for any reason. You do have to torque the bellhousing up to the block before re installing a sump.

[stevieturbo]

I cant see any reason you'd need to alter the fitment of any OEM parts. They certainly wouldnt be doing it at the factory.

And even an aftermarket bellhousing etc....if it's right its right and it should be right. Again there should never be any need to muck about

[Gelf VXR]

I'm just researching what's involved doing a swap on the drive, if it's not required all the better.

[Gelf VXR]

MyM8V8 said:

Can't see why if its a stock GM block and no custom machining work has been done for any reason. You do have to torque the bellhousing up to the block before re installing a sump.

You don't need the GM alignment tools then?

[stevieturbo]

Gelf VXR said:

You don't need the GM alignment tools then?

No special tools are required at all, it's actually very easy.

The only thing you would need aligned is the friction plate if you're changing the clutch.

But a box removal/refitment is very easy ( albeit heavy )

Whilst by no means essential, this sort of tool is handy for taking the weight off. Also, make sure the car is nice and high off the ground, just makes life easier.


https://www.amazon.co.uk/Draper-53095-Floor-Transm...

[gsd2000]

stevieturbo said:

Gelf VXR said:

You don't need the GM alignment tools then?

No special tools are required at all, it's actually very easy.

The only thing you would need aligned is the friction plate if you're changing the clutch.

But a box removal/refitment is very easy ( albeit heavy )

Whilst by no means essential, this sort of tool is handy for taking the weight off. Also, make sure the car is nice and high off the ground, just makes life easier.


https://www.amazon.co.uk/Draper-53095-Floor-Transm...

i have the above jack and it works great if you are pulling the box out on a drive

[MyM8V8]

Don't forget to buy/borrow three or four 3/8 drive extension bars or a very long one.

The stock dowels are tapered so will align everything for you. Just a bit of a wiggle and shove and it will slide in OK.

[bigwheel]

MyM8V8 said:

Don't forget to buy/borrow three or four 3/8 drive extension bars or a very long one.

The stock dowels are tapered so will align everything for you. Just a bit of a wiggle and shove and it will slide in OK.

[mikeyb1987]

MyM8V8 said:

Just a bit of a wiggle and shove and it will slide in OK.

The very words I live by.