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| | | | Joined: Jan 2007 Posts: 66 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2007 Posts: 66 | Hi all,
I'm in the midst of putting a Dana 70HD in the rear of my 1950 1.5 ton Chevy. This rear axle doesn't appear to have any form of emergency/parking brake provisions built in. does anyone know if there was ever a transmission mounted parking brake made for the driveshaft output of an SM420 transmission?
Any other ideas?
Thanks!
Jon
| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Yes, very common in the larger trucks.
Someone had put one in my 52 1 ton, and I have a spare, honestly I can't say I remember seeing an SM420 without a parking brake, but then again I don't look under the baby trucks much...
Post a wanted add, and you'll have one pretty quick.
You may need to swap a number of parts on the back of the transmission, probably simplest to just swap the whole transmission, as they are usually pretty cheap.
Grigg | | | | | Joined: Jan 2007 Posts: 66 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2007 Posts: 66 | Thanks Grigg. I figured they were probably available but I wasn't having any luck just searching the internet. I saw that they were available behind Clark 5 speeds but didn't find anything for the SM420. Anyway, I'll post a Wanted ad,,, thanks again.
Jon
Jon
| | | | | Joined: Feb 2004 Posts: 29,809 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,809 | My 59 model 3800 1-ton had a SM-420 with a trans-mounted parking brake, a big drum on the output shaft with a brake band wrapped around it and a lever through the floor to apply it. That was pretty much standard equipment for anything 1-ton or bigger, and I believe the 3/4 ton trucks also had that parking brake setup. There should be plenty of them out there somewhere.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Jul 2005 Posts: 226 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2005 Posts: 226 | Ive got a couple of them, matter of fact have a 283 with sm420 with the parking brake on itfrom about a 64... pulled as a unit, also have i think about a 59 235 with tranny and brake attached pulled as a unit....
What it will say on my Tombstone: "Boy, that guy sure owed alotta people Money"
| | | | | Joined: Jan 2007 Posts: 66 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2007 Posts: 66 | Any chance that you would want to part with the brake assembly from either one?
Jon
| | | | | Joined: Jul 2005 Posts: 226 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2005 Posts: 226 |
What it will say on my Tombstone: "Boy, that guy sure owed alotta people Money"
| | | | | Joined: Aug 2005 Posts: 1,186 Shop Shark | | Shop Shark Joined: Aug 2005 Posts: 1,186 | This is what your looking for.
Bruce | | |
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