diff question

Reply Subscribe

Thread Tools

Search this Thread

06-12-13, 09:03 PM

jonnyb07

Junior Member

Thread Starter

iTrader: (1)

Join Date: Sep 2012

Location: ga

Posts: 33

Likes: 0

Received 0 Likes on 0 Posts

diff question

I am trying to buy a diff from a guy for my fd. Hes not sure if it is the 3.9 or the 4.1. Its not stock .it was rebuilt with the clutch style limited slip. Is there any way to tell the differences in the two?

Reply Like

06-12-13, 10:14 PM

eage8

1308ccs of awesome

iTrader: (9)

Join Date: Sep 2003

Location: Woodbine, MD

Posts: 6,189

Likes: 2

Received 17 Likes on 15 Posts

spin the axle around in the diff once. If the driveshaft flange spins around just less than 4 times it's a 3.9, just more than 4 times it's a 4.1

Reply Like

06-19-13, 04:57 PM

SleepieDaze

240 Fan

Join Date: Jun 2005

Location: San Diego

Posts: 18

Likes: 0

Received 0 Likes on 0 Posts

^^thats probably the best way to find out

Reply Like

06-19-13, 08:47 PM

vrx8

Built not Bought

iTrader: (18)

Join Date: May 2010

Location: San Antonio, TX

Posts: 662

Likes: 3

Received 11 Likes on 8 Posts

you can count the teeth on the ring gear and divide it by the number of teeth on the pinion and that will tell you what gear it is.

Reply Like

Reply Subscribe

Related Topics

Thread

Thread Starter

Forum

Replies

Last Post

Adaptronic S5 Turbo PNP Unit questions

_Tones_

Adaptronic Engine Mgmt - AUS

05-25-21 05:37 AM

Zac's 1998 Series 7 RS

ZacMan

Build Threads

09-19-15 09:20 PM

yet another n/a 6 port turbo question

mulcryant

2nd Generation Specific (1986-1992)

09-09-15 05:24 PM

anti-skid deleted brake hard line questions

Nosferatu

2nd Generation Specific (1986-1992)

09-05-15 02:13 PM

Reply Share

First
Prev
1 / 1
Next
Last