Slant6 3 speed manual bellhousing to transmission pattern

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Dave999

Dave999

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Anyone got a diagram with the measurements?

head a rumor that the slant 6, 3 speed manual trans Bell housing uses the same pattern as the slat 6 australian 3 speed Bell housing the only difference being the australian one has the clutch window on the other side IBR spigot size is the same

on top of that, i don't think the australians used a different 3 speed when they went to the hemi 6
which would mean a hemi 6 3 speed manual bellhousing would share the same pattern, and i have one of those

but it would be good to check

top holes 1.77 inch up from crank centre line
bottom 3.58 down from centre

6.6 between bottom holes and 6.6 between the top holes

this was not accurate but indicative measurement

didn't measure IBR hole but probably 4.35

can anyone confirm
 
Looks the same as what I have. 6.6 top & bottom . 4.35 center top to bottom 5.38ish. Hope that helps .
20250503_203507.jpg
 
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Thanks for the heads up, its a bit of a minefield but i'm getting there.

I'm running a Hemi 6, with what is kind of like a slant 6 flywheel for 9.5 inch clutch originally, but 148 tooth ring gear and a 25 mm starter odd combo, standard, but fits the bell i have.

(side note: slant 6 flywheel will fit hemi 6 if you oval one flywheel bolt hole....starter potentially the US 35mm one??? )

looks like australian slant 6 bell used the pattern and IBR (4.35 size) that the US used for 3 speed box in an early A.

Australian Hemi 6 3 speed used a Hemi 6 bell with the same IBR (4.35 size) and pattern as the US and Australian slant 6 3 speed

Australian hemi 6 4 speed used a hemi 6 bell with what seems to be the US hemi sized 4.8 IBR with 3 bolts the same as the 3 speed bell (top and bottom left, bottom right) and one top right (from the rear of the engine) further out, just to be awkward.

the hemi 6 bell has the 318 pattern on the motor side for the top 3 bolts but has the dowels in the wrong place (wider than 318) and the starter in the slant 6 position.
to a fit a small block bell you'd have to drill new dowel holes in the engine block, cut off the lower block mounting ear to fit the starter down low and put in a bolt next to it into a section of the engine block traditionally filled with block flange support webbing (one of the reasons i have discounted using a small block bellhousing, like a quicktime, once done there ain't no going back.

all bells and input shafts are "mopar" length and all spigot on end of input are 3/4 inch

I think i have confirmed that my australian hemi 6 3 speed bellhousing is indeed the right one to be messing with...cheap, available (no one wants a 3 speed when a 4 speed is available) and boreable at the IBR register.

i'm re working my T5 installation plans as the 20mm thick adapter plate i have, puts the forward shift transmission 1/4 inch too far back, meaning a cut to the front pressed edge of the upper cross member loop where it is welded or brazed to the tunnel top on the front edge

1/4 inch steel plate in the design phase.... should shift it forward just enough to only cut through 1 layer of tunnel for the small square shift box. used a camaro stick that heals over towards my RHD position by 18 degrees right and swoops back,

we'll see :) easy, to say, never easy to do, i'm going to be retired before this gets done.
My Aim: - T5 going in with no cutting except shifter hole and some hammer work for the tunnel taper, if i can help it.

Dave
 
I'm shocked the the land of Oz hasn't already made Hemi-6 to T-5 conversion bells by now.
 
oh they have $700 for a nice cast aluminium bell but it then only works with their stud mount ford/mopar hybrid clutch fork and their ford throwout bearing and their spigot bush and their under bellhousing shield and front plate... Its a package.
and its set up for a locally produced BTR T5. really long tailshaft with its speedo drive over the top of the output shaft right at the cross member where there is no space and strange doughnut shaped rear mount
small potential user base = big cost

all in all a nice set up BUT that's over 1.2k AUD and the car needs cutting up to fit

add on the shipping and the import tax and the purchase tax applied to both the product and its shipping and it will be near double that landed in the UK

i could buy a brand new T5

or i could buy a kit with a T5 box that has a mopar input shaft fiction welded to the input gear of a t5 input shaft, i'm sure its fine, but id rather not. and shipping the whole box as well as the above kit adds a lot more to the shipping

been right round the options on this front a few times :)

Dave
 
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