1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Proper way to "lock" a diff. (pics)

Thread Tools
 
Search this Thread
 
Old 02-15-06, 03:43 AM
  #1  
Hunting Skylines

Thread Starter
 
REVHED's Avatar
 
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes on 2 Posts
Proper way to "lock" a diff. (pics)

I cut and welded a metal plate into both sides of the gear arrangement so all four gears are solidly tied together. I dare this sonofabitch to break.



Also, a teaser pic of my 13BT swap. Just need to put a FPR and exhaust in and she'll be ready to fire up.



Microtech installed in the glovebox...



which will be hidden by this panel.

Attached Thumbnails Proper way to "lock" a diff. (pics)-diff.jpg   Proper way to "lock" a diff. (pics)-engine.jpg   Proper way to "lock" a diff. (pics)-mt.jpg   Proper way to "lock" a diff. (pics)-mt2.jpg  
Old 02-15-06, 04:47 AM
  #2  
Wassup!!

 
Rotor13B's Avatar
 
Join Date: Jul 2001
Location: Longmont Co.
Posts: 1,081
Likes: 0
Received 1 Like on 1 Post
Sweet!!! Is that a fire exstinguisher under the glovebox?
Old 02-15-06, 05:23 AM
  #3  
Turbo widebody FB

iTrader: (1)
 
Dan_s_young's Avatar
 
Join Date: May 2004
Location: Alberta Canada
Posts: 3,733
Likes: 0
Received 2 Likes on 2 Posts
Very very nice setup, I hope some day to also be throwing down some big horsepower with my car with a nice swap like this! If you don't mind me asking what are you doing for the oil cooler? Are you just running the stock frontmount? And do you happen to have another thread detailing your motor swap in more detail?

Thanks!
Old 02-15-06, 05:41 AM
  #4  
Hunting Skylines

Thread Starter
 
REVHED's Avatar
 
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by Rotor13B
Sweet!!! Is that a fire exstinguisher under the glovebox?
Yep. Hopefully I won't need it.
Old 02-15-06, 05:42 AM
  #5  
Hunting Skylines

Thread Starter
 
REVHED's Avatar
 
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by Dan_s_young
Very very nice setup, I hope some day to also be throwing down some big horsepower with my car with a nice swap like this! If you don't mind me asking what are you doing for the oil cooler? Are you just running the stock frontmount? And do you happen to have another thread detailing your motor swap in more detail?

Thanks!
I'm running a stock oil cooler. If you search under my username you should find some threads about the swap.
Old 02-15-06, 07:20 AM
  #6  
RX for fun

iTrader: (13)
 
Siraniko's Avatar
 
Join Date: Aug 2001
Location: Socal
Posts: 15,926
Likes: 0
Received 22 Likes on 19 Posts
Originally Posted by REVHED
I cut and welded a metal plate into both sides of the gear arrangement so all four gears are solidly tied together. I dare this sonofabitch to break.


Much better weld than the one in my RX-3's poor man's posi.
Old 02-15-06, 07:31 AM
  #7  
Shoot the Gap

iTrader: (1)
 
Kalifornia087's Avatar
 
Join Date: Jan 2006
Location: Hell County
Posts: 258
Likes: 0
Received 0 Likes on 0 Posts
Beautiful... Just beautiful...
Old 02-15-06, 08:06 AM
  #8  
Junior Member

 
BIll Burdette's Avatar
 
Join Date: Feb 2002
Location: Maryland
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
It just may break. The way you did it looks good, but my uncle knew a guy who was a car junkie and a Ferrari machanic and he had his own machine shop in is garage. One of the tools he used when welding a diff is a oven to heat up the diff to an un-godly temperature to make a better bond between the diff and whatever he was welding to it. He welded one for my uncle's race car and it lasted 3 seasons road racing, while everyone else went through about 2-3 diff's per year. BTW The way everyone else did it was to put nuts and bolts inside the spider gears and weld it all together. The way you did it looks much better.
Old 02-15-06, 11:41 AM
  #9  
southernrunner

 
southernrunner's Avatar
 
Join Date: Jan 2005
Location: Des Allemands, La
Posts: 1,207
Likes: 0
Received 0 Likes on 0 Posts
How much did the engine cost?
Old 02-15-06, 01:08 PM
  #10  
Blood, Sweat and Rotors

iTrader: (1)
 
DriveFast7's Avatar
 
Join Date: Aug 2001
Location: California
Posts: 3,742
Received 1 Like on 1 Post
Nice work. Thick penetrating welds.
Old 02-15-06, 01:26 PM
  #11  
Rotary Enthusiast

 
skizzle84's Avatar
 
Join Date: Aug 2005
Location: Richmond, Virginia
Posts: 954
Likes: 0
Received 0 Likes on 0 Posts
Is there any write ups on how to lock a diff (for a n00b) compared to switching out the whole suspension
Old 02-15-06, 05:35 PM
  #12  
Junior Member

 
Tatterjuice_771's Avatar
 
Join Date: Jan 2006
Location: Ks
Posts: 47
Likes: 0
Received 0 Likes on 0 Posts
I problem with the "poor man's posi" is the fact the gears are cast and cast doesn't like to be welded unless it's preheated to about 1,500 degrees F, and requires a stick or wire meant to weld cast iron which is an alloy or combination of two or more metals, but it'll hold for a while, how long is unknown though.....
Old 02-15-06, 07:16 PM
  #13  
REW'd FB

 
z-beater's Avatar
 
Join Date: Dec 2004
Location: WA
Posts: 2,685
Likes: 0
Received 0 Likes on 0 Posts
Very nice...why are you holding out pictures of the turbos side...I want to see
Old 02-15-06, 08:03 PM
  #14  
Hunting Skylines

Thread Starter
 
REVHED's Avatar
 
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by Tatterjuice_771
I problem with the "poor man's posi" is the fact the gears are cast and cast doesn't like to be welded unless it's preheated to about 1,500 degrees F, and requires a stick or wire meant to weld cast iron which is an alloy or combination of two or more metals, but it'll hold for a while, how long is unknown though.....
I think the axles will break before the diff does. I know several people who have done it exactly this way and they haven't had a problem. Only time will tell though.

It's only a temporary measure until I can get my Guru Torsen anyway.
Old 02-15-06, 08:05 PM
  #15  
Rotary Enthusiast

 
Lee Lyons's Avatar
 
Join Date: Jun 2003
Location: Calgary; AB
Posts: 1,288
Likes: 0
Received 0 Likes on 0 Posts
don't know why you'd want to make a nocker...
Old 02-15-06, 08:13 PM
  #16  
Hunting Skylines

Thread Starter
 
REVHED's Avatar
 
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by z-beater
Very nice...why are you holding out pictures of the turbos side...I want to see
Nothing special. Just a high-flowed Series 5.

Attached Thumbnails Proper way to "lock" a diff. (pics)-turbo.jpg  
Old 02-15-06, 08:14 PM
  #17  
Hunting Skylines

Thread Starter
 
REVHED's Avatar
 
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by Lee Lyons
don't know why you'd want to make a nocker...
A number of reasons... can't afford an LSD at the moment and they're hard to come by here short of a Guru Torsen or full Hilux conversion, open-wheelers suck, this isn't a daily driver and I'll need all the traction I can get. Don't knock it until you've driven one.

Last edited by REVHED; 02-15-06 at 08:19 PM.
Old 02-15-06, 08:19 PM
  #18  
Airflow is my life

 
Rx7carl's Avatar
 
Join Date: Aug 2002
Location: Orlando, Fl
Posts: 6,736
Likes: 0
Received 1 Like on 1 Post
Looks good, now that sucker is locked!
Old 03-01-06, 01:40 AM
  #19  
The Shadetree Project

iTrader: (40)
 
Hyper4mance2k's Avatar
 
Join Date: Jul 2002
Location: District of Columbia
Posts: 7,301
Received 3 Likes on 3 Posts
My LSD is shot I wanna do that now... Dori Dori
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ZacMan
Build Threads
4
09-19-15 09:20 PM
Enzo1944
New Member RX-7 Technical
2
09-06-15 08:57 AM



Quick Reply: Proper way to "lock" a diff. (pics)



All times are GMT -5. The time now is 09:57 AM.