Differential Questons

Reply Subscribe

Thread Tools

Search this Thread

Nov 15, 2005 | 02:59 PM

billemc

Thread Starter

Senior User

Joined: Jul 2003

Posts: 126

Likes: 0

From: San Antonio

Differential Questons

I am doing the body and paint now, I have addressed all mechanical issues with the exception of the rear end. I know I need some sort of posi-trac or limited slip. I have looked in Jags and others but don't really know what I am looking for. I am running a 390 with upgrades (cam, 60 over, 750 carb, electronic egnition ect.) The stock 3 speed column shift is what I have chosen to keep. Any ideas on a rear end would be appreciated. As much as I have tied up into this truck I don't want to use used parts, I would rather have new, performance equipment. thanks for any ideas. Billemc

'71 XLT

Nov 15, 2005 | 03:03 PM

ford390gashog

Fleet Owner

Joined: Jan 2004

Posts: 26,007

Likes: 575

From: Brentwood,CA

you just need standard ford 9'' parts. pretty easy to find. if you want a whole new rear end give currie industries a call.

Nov 15, 2005 | 03:07 PM

billemc

Thread Starter

Senior User

Joined: Jul 2003

Posts: 126

Likes: 0

From: San Antonio

My Diff. is fine, I just think it might need some help with the increased power. And I dought it has any kind of traction control. Billemc

Nov 15, 2005 | 09:20 PM

comertrucks

Junior User

Joined: Mar 2002

Posts: 76

Likes: 0

From: columbia

currie can sell you the drop in all set up with any kind of traction device you want, all you do is put it in.

Nov 15, 2005 | 10:14 PM

ford390gashog

Fleet Owner

Joined: Jan 2004

Posts: 26,007

Likes: 575

From: Brentwood,CA

www.summitracing.com

Nov 16, 2005 | 12:18 AM

fordraceboy

Posting Guru

Joined: Oct 2005

Posts: 1,235

Likes: 2

randy's ring and pinion sells drop in 3rd members that are cast iron for dirt cheap..

Nov 16, 2005 | 06:39 AM

jowilker

Fleet Owner

Joined: Jun 1999

Posts: 24,552

Likes: 74

From: Creedmoor, North Carolina

Quote:

Originally Posted by billemc

My Diff. is fine, I just think it might need some help with the increased power. And I dought it has any kind of traction control. Billemc

Anything can break, but the stock 9" will take anything the 390 can throw under normal daily driving conditions.
Drag racing with slamming gears could require a custom built unit. IMHO

John :=X06