DIFFERENTIAL CARRIER
Thread Starter
Instructor
Joined: Jan 2002
Posts: 218
Likes: 0
From: Waterloo IL
DIFFERENTIAL CARRIER
Does someone know how by looks or a number know how to identify a 4 series carrier, one that is used for 4:11, 4:56 as opposed tp the 3 series? Thanks Dale e-mail VAL56@AOL.com
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
Re: DIFFERENTIAL CARRIER (Dale Z)
There is DEFINITELY a difference, to use a 4 series gear (3.9-4.56) on a 3 series case you need a ring gear spacer so does that mean the 4 series carrier has a thicker ring gear mounting flange?? I think so. ..redvetracr
[Modified by redvetracr, 10:22 PM 2/2/2003]
[Modified by redvetracr, 10:22 PM 2/2/2003]
Melting Slicks
Joined: Aug 2001
Posts: 3,050
Likes: 124
From: Wichita KS
Re: DIFFERENTIAL CARRIER (redvetracr)
There is DEFINITELY a difference...
Melting Slicks
Joined: Aug 2001
Posts: 3,050
Likes: 124
From: Wichita KS
Re: DIFFERENTIAL CARRIER (redvetracr)
The differential case (not carrier) does have different part numbers. In group 5.510.
These are differential case part numbers with positive traction. (There are different differential case numbers listed for cars w/o p/trac.)
P/N 3997926 for 1963-80: 2.73, 3.08, 3.35, 3.55, 3.70
P/N 3997927 for 1963-77: 4.11, 4.56
[Modified by mapman, 12:41 AM 2/3/2003]
[Modified by mapman, 1:38 AM 2/3/2003]
These are differential case part numbers with positive traction. (There are different differential case numbers listed for cars w/o p/trac.)
P/N 3997926 for 1963-80: 2.73, 3.08, 3.35, 3.55, 3.70
P/N 3997927 for 1963-77: 4.11, 4.56
[Modified by mapman, 12:41 AM 2/3/2003]
[Modified by mapman, 1:38 AM 2/3/2003]
Racer
Joined: Jul 2002
Posts: 275
Likes: 13
From: South Bend, Indiana
Re: DIFFERENTIAL CARRIER (mapman)
Has anyone ever seen the 4.88 ring and pinion? It had a chev part number available only over the counter ready to bolt in a 4 series. I actually bought a set many years ago for my C2 fuelie. And they were quiet.
1976 406, 12 to 1, TH400 3000stall switchpitch, 4.11, nitrous, 12.14 on radials
1976 406, 12 to 1, TH400 3000stall switchpitch, 4.11, nitrous, 12.14 on radials
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Re: DIFFERENTIAL CARRIER (redvetracr)
I wish I could post a picture. I have 2 pictures of a 3 series and 4 series carriers right next to each other. There is definitly a difference.
Lets try this.left is 4 series right is 3 series
[Modified by Gordonm, 7:51 PM 2/5/2003]
[Modified by Gordonm, 7:52 PM 2/5/2003]
Lets try this.left is 4 series right is 3 series
[Modified by Gordonm, 7:51 PM 2/5/2003]
[Modified by Gordonm, 7:52 PM 2/5/2003]
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Racer
Joined: Oct 2001
Posts: 279
Likes: 1
From: Stonewall N.C.
Re: DIFFERENTIAL CARRIER ('79ProwlerOrange)
I have a 4.11 gear ratio, can I still have this in a 3 series carrier? or is this why I have to use the ring gear spacer? And what do you want for your 4 series?
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Re: DIFFERENTIAL CARRIER (vettedreams)
Yes you need a 4 series carrier. I had a 4.11 on a 3 series. That is why I got the 4 series carrier. I was going to swap it out but I blew the ring gear right off the 3 series carrier. Never got to install the 4 series carrier. I had a 3.70 ready to go so I just put that in. I would not recomend the spacer. I paid 200 for the carrier, I'll take 175 shipped to you
Racer
Joined: Oct 2001
Posts: 279
Likes: 1
From: Stonewall N.C.
Re: DIFFERENTIAL CARRIER (Gordonm)
I too have broke all 10 bolts for the ring gear. The ring & pinion are still in excellent condition, can I just bolt these to the 4 series carrier? do I need a shim kit, thanks for the info, if I don"t have to fork out to much $ I think I"d rather have the 4 series, also will it fit in my case?
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Re: DIFFERENTIAL CARRIER (vettedreams)
You should be able to bolt the ring gear right up. I would check the pattern and back lash any time I have changed anything in the diff. It is just cheap insurance. You might get lucky and not have to do anything. Then again you might have to shim it one way or the other. You can't tell until it is mocked up and checked. This case will fit from 65-79 Vettes
