Forum Index
Jeep Horizons HomeLinksJeep Horizons Tech Write-upsJeep newsLand useContact

 Watched TopicsWatched Topics   FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Anyone have CAD data for D300 or SM420?


 
Post new topic   Reply to topic     Forum Index -> Drivetrain
View previous topic :: View next topic  
Author Message
hansw3
Member


Joined: 22 Jul 2007
Location: Minneapolis

PostPosted: Thu Dec 27, 2007 6:18 pm    Post subject: Anyone have CAD data for D300 or SM420? Reply with quote

I am mating D300 to SM420. CAD data on either would be useful! (2D or 3D)
Back to top
View user's profile Send private message
hansw3
Member


Joined: 22 Jul 2007
Location: Minneapolis

PostPosted: Sun Dec 30, 2007 9:17 am    Post subject: link to pics included Reply with quote

Here is couple images of what I'm working on:

http://picasaweb.google.com/hansw3/S...D300AdapterPic

It would be great to get actual CAD data. Some Jeep maniac out there must have at least the D300 data, if not the SM420 (older GM tranny). I modeled this stuff from measuring the parts with caliper, square and tape measure. In the image the SM420 case is only represented by the black flange portion of it that mates to the adapter. The adapter is 3/4" shorter than what Novak sells. I am putting this in cj5, so length is critical.

The SM420 has about 7.05:1 1st gear and the D300 has 2.62 low range. Compared to my stock T-150 and D20 I'll have a crawl ratio of 84 instead of 27.
Back to top
View user's profile Send private message
Orangeamc13
Got Rev Limiter?
Got Rev Limiter?


Joined: 20 Feb 2006
Location: East Springfield, Massachusetts - U.S.A.

PostPosted: Sun Dec 30, 2007 9:36 am    Post subject: Reply with quote

The link isn't working.
_________________
Underground Jeeps
Back to top
View user's profile Send private message Visit poster's website AIM Address Yahoo Messenger
hansw3
Member


Joined: 22 Jul 2007
Location: Minneapolis

PostPosted: Sun Dec 30, 2007 10:46 am    Post subject: 2nd link attempt Reply with quote

http://picasaweb.google.com/hansw3/SM420ToD300AdapterPic

If this doesn't work I'm not sure how to get a picture here. I tested the one I pasted into the last post and it worked on my computer.
Back to top
View user's profile Send private message
hansw3
Member


Joined: 22 Jul 2007
Location: Minneapolis

PostPosted: Sat Jan 26, 2008 11:21 pm    Post subject: Reply with quote

I am now looking to purchase the Novak kit.

After consulting some welding experts I have decided not to fabricate adapter. The modified input shaft would be the real issue. See below if you're interested.

there would be 50/50 chance that modifying my shaft would result in breakage for my abusive application (1400 ft-lbs at 400 rpm).

If modifying existing shaft:

* Anneal existing shaft and cut off end
* Weld on new female splined coupler
* Relieve weld stress
* Heat treat (through hardening would be more likely to break than induction hardening)



New shaft fabrication would cost about $450.

* Recommended material would be either 4140 or 4340 (recommended 4340 because of rotating shaft with high torque)
* Hardness would be determined by measuring existing shaft (rule of thumb- more torque requires higher hardness)
* Splines would be made by fitting up the mating parts I would supply to them until they fit.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic     Forum Index -> Drivetrain All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Visit links4jeeps.com for write-ups, forums and clubs




Jeep®, Wrangler, Cherokee, Liberty and Grand Cherokee are copyrighted and trademarked to Chrysler LLC.
jeephorizons.com is not in any way associated with or endorsed by the Chrysler LLC.
All other content is copyright Jeep Horizons 2004-2008.
Tech write-ups Links Discussion board Land use News Site Map Terms of Use

Powered by phpBB © 2001, 2005 phpBB Group