rx7dreamn1

iTrader: (3)

im doing a manual swap in my car i wana use the 3:9 auto diff do i have 2 use a manual driveshaft or auto.and does any1 have a link where i can buy the companion plate? thanx

20B 3 Rotor

iTrader: (7)

From what I have read, you have to use the manual trans driveshaft. From there you have 2 options, either buy a manual differential companion flange, or drill out the automatic companion flange to accept the manual trans driveshaft.

Im just going to be drilling the companion flange when I do my swap, and then upgrade the diff sometime in the future.

rx7dreamn1

iTrader: (3)

do you know where i can buy 1? the manual differential companion flange

20B 3 Rotor

iTrader: (7)

when I checked on ebay a couple days ago, there were none. I would just keep checking on the board for one.

rx7dreamn1

iTrader: (3)

thanx guys 4 your help ill probaly end up drilling it if i cant find 1. dueces

2jzaddict

Is the 3:9 auto diff LSD like the manual?

IRPerformance

iTrader: (41)

The auto lsd is the same, but the ring and pinion have the taller 3.90 ratio. Personally I would not drill the companion flange because it can effect balance, but some people have done it. I would get the proper unit.

Fritz Flynn

iTrader: (263)

I have the manual diff companion flanges send me PM if you need one.

Thanks,
Fritz

IRPerformance

iTrader: (41)

Make sure you replace the crush collar if you are going to be changing flanges. You will also have to set the gear lash. This is another thing some people get away with by just slapping it together, but I like to do it right.