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Dad wanting to drop from 4.11's to 3.55... whats needed

  • Thread starter Thread starter grantur01
  • Start date Start date Jun 21, 2005

grantur01

Founding Member
Nov 7, 2001
226
0
16
Dayton, OH
Jun 21, 2005
#1
  • Jun 21, 2005
  • #1
Like the title says. My dad has a 66 Fastback.. mods in sig. The 4 speed is killer with the 4.11's. It wears me out to drive it around. Speedo doesn't work but it seems like i go to 4th gear at 40 mph. So it really kills the driveability. this car is not a track car. Its a cruiser that happens to have some balls. It would definately top out in no time at the 1/4 mile. So if he would let me take it to the track the 3.55 would definately benefit.

ANYWAY- Do I look for a whole posi rear end with a 3.55 in it? Whats the best/cheapest/effective route? Or do I take his rear end and have a 3.55 put in it? Is this all their is for the gear swap or rear end swap? Anything we might run into?

Thanks in advance
 

mfp4073

Founding Member
Mar 14, 2001
387
0
38
Hells Ditch, FL
Jun 21, 2005
#2
  • Jun 21, 2005
  • #2
ring and pinion only. Gears are the same between traction loc and open rears. Pretty much just an r/r procedure but you will need to resetup the lash and mesh pattern.
 
G

gjz30075

Member
Aug 30, 2004
250
0
17
Roswell, Ga
Jun 21, 2005
#3
  • Jun 21, 2005
  • #3
Another cost effective, time effective way is to find a 9" chunk with 3.50 gears. The 8" had 3.55's. Should be able to find one already set up and R&R is quick then.
 

TampaStang

New Member
Feb 29, 2004
67
0
0
Tampa, FL
Jun 21, 2005
#4
  • Jun 21, 2005
  • #4
t-5 swap time?
 

Pbum5

Member
Oct 27, 2004
515
0
17
Minneapolis, MN
Jun 21, 2005
#5
  • Jun 21, 2005
  • #5
I'm sure some one would be willing to trade you for them. Post something in the classifieds
 
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