clutch

V8 Sam · Post by **V8 Sam** » Wed Oct 03, 12 8:30 pm

anyone know what sort of clutch a '70 4 speed 318 dart would use?

Ta!

Blue · Post by **Blue** » Wed Oct 03, 12 8:49 pm

Borg & Beck normally.

V8 Sam · Post by **V8 Sam** » Wed Oct 03, 12 8:49 pm

what type?

been asked different questions about it, how many splines does it have etc..

PaulR · Post by **PaulR** » Wed Oct 03, 12 8:56 pm

My 340 has 23 spline 10.5 inch clutch.Would think 318 would be the same. 18 spline would be Hemi 4 speed.I used a centreforce which has a good light pedal but bites really well.

AllKiller · Post by **AllKiller** » Wed Oct 03, 12 9:00 pm

18-spline was 440 and Hemi, ONLY.
Starting in 1970 big block had 23-spline four speeds got the big front bearing, too.
And as there were no more big block A-bodies after 1969,..... they all got the 23-spline.
LS23HGTS

Some 383s had 18 spline some had 23 ??

Pete · Post by **Pete** » Wed Oct 03, 12 9:15 pm

Also the diameters vary.

I used a Centreforce clutches in my SB Barracuda and BB 'Bird before I had the common sense to switch to Autos.

Centreforces are a lot lighter pedal pressure and you can also remove the over-centre spring............

Adrian Worman · Post by **Adrian Worman** » Wed Oct 03, 12 9:16 pm

The flywheel itself, 10 1/2" 130 teeth or 11" 143 teeth, will dictate what size diameter centre plate and cover you use but as the others have said its almost certainly gonna be 23 spline.
The 3 eared or fingered design is known as the Borg and Beck type, it was factory fare back in the day and still a basic replacement now.
If you can afford say a Zoom or Centerforce clutch kit then you will have a diaphragm type of cover that will be far easier to operate and give better street/ strip performance by far.
Remember to remove the over centre spring on the clutch pedal if you lose this type or the pedal will stay on the floor!
Four speeds are Bananarama! brilliant

Pete · Post by **Pete** » Wed Oct 03, 12 9:20 pm

Snap!
Also you may have to limit clutch pedal travel with a Centreforce or you will turn the diaphragm inside out. A block under the carpet secured down will work...............

Mick · Post by **Mick** » Wed Oct 03, 12 9:26 pm

I used to run a borg and beck scallop clutch in the Dart with the 340 and i think it had a 143 tooth flywheel, not sure it was quite a while ago.
Mick

V8 Sam · Post by **V8 Sam** » Wed Oct 03, 12 9:35 pm

so a borg and beck 10 1/2' 130 teeth will do the job?

shovelheadrob · Post by **shovelheadrob** » Wed Oct 03, 12 9:45 pm

Mick wrote:I used to run a borg and beck scallop clutch in the Dart with the 340 and i think it had a 143 tooth flywheel, not sure it was quite a while ago.
Mick

Pretty sure it was an 11 inch clutch when you had it off me so 143 tooth, your right it was a long time ago!

Adrian Worman · Post by **Adrian Worman** » Wed Oct 03, 12 9:49 pm

Pete wrote:Snap!
Also you may have to limit clutch pedal travel with a Centreforce or you will turn the diaphragm inside out. A block under the carpet secured down will work...............

Excellent point Pete!
Very important that you don't over extend the clutch cover otherwise you risk damaging the diaphragm fingers and even the outside edge of the release bearing

I use a bolt clamped to the upper part of the pedal

Pete · Post by **Pete** » Wed Oct 03, 12 9:56 pm

FFS do not burr the pilot bearing when taking the gearbox out or re-installing it. You will never get the Gearbox to engage properly. Been there, Done that

Nowadays you can get needle roller bearings instead of the old sintered pilot bush..........

Mick · Post by **Mick** » Wed Oct 03, 12 9:57 pm

A scallop was an 11" clutch, i went through at least one pressure plate and two drive plates after i bought it off you, as regards the flywheel, i honestly cant remember. I do things now and three weeks after i've done them, i couldn't tell you what i did.
Mick

Adrian Worman · Post by **Adrian Worman** » Wed Oct 03, 12 10:51 pm

Pete wrote:
Nowadays you can get needle roller bearings instead of the old sintered pilot bush..........

...........and they're a piece of Bananarama! to fit, don't have to remove the old one either

Perfect for converting an auto trans car to manual without having the crank machined out too.......just order a pilot bearing for any late model Magnum engine