Hey all,
The car I am working on my restoration project swap with has turned up a nice surprise in it's rear end. Turns out the donated shell has a 3:53 posi rear end with about 120,000kms on it. The rear end in the original car that I was transplanting over has a 3:73 non-posi rear end in it.
I am pretty certain that I am going with the posi-rear end and taller gears, but I want to hear the brickboards thoughts on posi-rear ends and any experiences?

Cheers,
Phil


PS I finally have some more pictures of the torn down old car, and the new shell that it is going into, I will updated my website in the coming days, and will post when it's ready to go!
--
Phil Sinnott '81 245 630,000kms

newbie question:

My 81 DL wagon B21A was on a hoist 2 days ago. When I spun the back wheel, the other one spun too. Does this mean there is an LSD or posi there? I haven't had it for a winter yet, so I don't know if only one wheel spins.

__Stef

Hey,

Probably not an LSD. If it took a lot of effort to turn a wheel (handbrake off), maybe (i have no personal experience with them), but with a normal diff, if you turn one wheel, the other will rotate in the opposite direction. Also, with the motor still, both wheels may never be turned in the same direction.

Julian

I put a 3.73 LSD in the '83 242Ti "flathood" and it is fabulous. I like the compromise 3.73, plenty of propulsion and nice cruising too. At the time, I was told they could easily order gears to change it to any ratio, rather cheaply. Sooo, either ratio is fine but use the LSD!

I'm pretty sure the 3.54 uses a different carrier than the 3.73; the ratios aren't that much different, as you say, so definitely go fot the LSD.