Author Topic: 6 speed Magnum in to C3 (Read 14712 times)

bfit · « **on:** June 04, 2012, 03:13:36 PM »

A few photos of mount to fit Tremec 6 Speed magnum in to early C3

end view of plate the welds to chassis

chassis mount on cross member
Mount weld in original position as original cross member

Trans mount is positioned 25 mm forward and 20mm lower that the origin mount on the cross member

It a pears that a transmission guard will be needed as the transmission will be lower that the bottom of the cross member .

Andy
I think I am on top of the swap
keep you posted

Bift

sirfixalot · « **Reply #1 on:** June 04, 2012, 09:19:26 PM »

Will look like a factory x-member to the untrained eye.
Subtle changes that incorporate improvements has got to be good

69 DIRTY RAT · « **Reply #2 on:** June 04, 2012, 10:53:37 PM »

Good job!

bfit · « **Reply #3 on:** June 18, 2012, 10:48:16 AM »

the process continues

Gear box as it arrived

Trany with Bell housing
I have the box

First problem is the speedo drive points the cable straight at the exhaust.

I am not in the process of shorting the drive out of the box,
to allow the use of a 90 deg drive .
With the cable drive as supplied the 90 Deg cable drive will not fit
It interferes with the mounting pad of the transmission.
Bift

Jethro · « **Reply #4 on:** June 18, 2012, 06:07:16 PM »

Hey Rob,

Doesn't the new 6 speed box have the alternative to run electrical speedO as well as the traditional mechanical?

bfit · « **Reply #5 on:** June 18, 2012, 06:43:09 PM »

Yes jethro it has both
I want to run the mechanical drive to keep it simple
I will post photos tomorrow of the modified drive to move the 90 deg cable drive up closer to the box
Bfit

Jethro · « **Reply #6 on:** June 18, 2012, 06:47:58 PM »

Looking good Rob

bfit · « **Reply #7 on:** June 19, 2012, 09:01:54 AM »

Speedo drive problems solved

Original speedo drive as supplied

To get this to fit I have to Cut 16mm of the end of the mounting pad.
TO use a cable straight on the speedo drive would run the cable straight at the exhaust

I modified the drive as shown to get more clearance

Speedo drive 15mm shortened to move angle drive up closer to gear box for clearance to exhaust

Modified drive fitted to gead box

bfit · « **Reply #8 on:** June 21, 2012, 11:13:47 AM »

Trail fit magnum to 76 auto body

Trans in position
I had to cut the tunnel to get the box up to the correct center line
the section removed is the area where the original auto shifter was mounted .
this section protrudes down towards the gear box about 32mm.
the hole will serve as the shifter position.

in the photo above you can see the trans mount the bottom of the mount is 10mm below a lone taken across the bottom of the chassis.

this photo show gear box sitting at center line of original box
there is just adequate clearance.
note the top of the shifter area is at an angle that is standard in the design of the gear box its about 17 degs to the left side.

this is a 76 auto body I would think there will be less room in a 70 model manual body I will know in a few months if that is true.

the photos could be better but that is how it is when you take them with a phone in the middle of the night

Bfit

bfit · « **Reply #9 on:** August 27, 2012, 10:55:15 AM »

I am finding time to work on this again

modifying the transmission mount
the tremec magnum rear mount is 3.1" to the center line of the out put shaft
I have machined this to 2.785"
the Mounting pad is now 5/8" think at the mounting bolt hole
I removed 0.225" ( 5.715 mm )

the mounting pad on box comes set up for chev and ford
I machine the the excess off

Camo · « **Reply #10 on:** August 27, 2012, 12:55:39 PM »

Handy things those mills.

nice work, keep us posted

Hey I got a question for you..

I was looking at your modified speedo drive, how did you shorten it, I see heat marks, cut and tig?

bfit · « **Reply #11 on:** August 27, 2012, 02:30:31 PM »

Quote from: Camo link=topic=9256.msg1045943540#msg1045943540

Handy things those mills.

nice work, keep us posted

Hey I got a question for you..

I was looking at your modified speedo drive, how did you shorten it, I see heat marks, cut and tig?

posted on 27-8-2012 at 02:25 PM

I bored the threaded section out to 0.625" Dia
then parted it off.

Then machined the OD of remainder to accept the threaded part with 0.001 clearance and leaving a shoulder of 0.236" (6mm)

I silvered solders the two together
using no. 2 flux and 55% silver solder.

I can do you a drawing if you are not sure of what I have described
Bfit

Camo · « **Reply #12 on:** August 27, 2012, 04:24:33 PM »

Quote from: Bfit link=topic=9256.msg1045943541#msg1045943541

I bored the threaded section out to 0.625" Dia
then parted it off.

Then machined the OD of remainder to accept the threaded part with 0.001 clearance and leaving a shoulder of 0.236" (6mm)

I silvered solders the two together
using no. 2 flux and 55% silver solder.

I can do you a drawing if you are not sure of what I have described
Bfit

No that's fine thanks, I got it. Was just curious. Nice job.