<VV> positraction additive -yes or no

[Sethracer at aol.com]

In a message dated 5/1/2008 10:11:06 A.M. Pacific Daylight Time,  
dfamily at fairpoint.net writes:

I am  draining the differential and transmission 
on my son's 65 140 hp, 4 speed  , positraction 
Monza.  (I installed drain plugs about 10 years  ago).   
What is the latest thinking on using  a positraction additive?  Is it 
recommended or not.  


 
Dennis - Be very careful about using advice in this case. Remember that the  
Corvair manual transaxles share a common lube with the differential. As far as 
I  remember, no other car uses a plate type limited-slip differential in 
common  with the transmission. Corvair guys know this, and will take it into  
consideration. For example, if you ask Amsoil or Redline Oil for a  recommendation 
on a GM "Posi" additive, they might not know about the  commonality. In the 
past, I have heard of certain "slippery"  synthetic additives which make the 
gears in the differential last longer.  If added to the manual transmission, the 
additive makes the Synchronizers (which  rely on the friction of engagement) 
non-functional, causing grinding during  gear shifts - every time!  -Seth 
Emerson
 
PS, If I had some of the posi additive,  I would use it. 



**************Need a new ride? Check out the largest site for U.S. used car 
listings at AOL Autos.      
(http://autos.aol.com/used?NCID=aolcmp00300000002851)