Differential gear swap
Thread Starter
Instructor
Joined: Oct 2008
Posts: 176
Likes: 1
Differential gear swap
I'm going to change the ratio on my '77, from 3.08 to 3.70. Will I need a new "posi" pack or are these the same? Also if they are the same, can they be rebuilt for cheaper than new? Any other advice or know how is much welcome. Thanks
Melting Slicks
Joined: Oct 2008
Posts: 2,154
Likes: 69
From: Regina Sk Canada
No you should be fine. Its when you go to a 4 series gear that you need a to go to another posi carrier. I think its Richmond that makes a 3.73 gear to fit where a 4.10 gear used to be. So thats the only one i know of that is swapable in that regard.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
All the 3 series gears will fit a 3 series carrier. There are some gear manufacters that make 4 series gears fit a 3 series carrier. You cannot make a 4 series gear fit a 3 series carrier.
Yes you can replace the clutch packs, beware of the cheap ones, they are not good and will self destruct. If you need info on the rebuilding contact Gary gtr1999 here on the forum. He is the expert. I have done a few myself but he has done many.
Yes you can replace the clutch packs, beware of the cheap ones, they are not good and will self destruct. If you need info on the rebuilding contact Gary gtr1999 here on the forum. He is the expert. I have done a few myself but he has done many.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
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