[Alpines] How reliable is an overdrive unit?

[Tony Somebody]

Lauri- I cant help with your inspection or give directions in changing the
main shafts etc BUT I have a S5 with OD and I love it. The car flys in
comparison to my S5 w/out OD. Of course it is geared a lot higher- Im
wondering how much gas milage would improve with a stock S5 rearend as the OD
unit helps tranny wise but not rear end wise.
 
Just my thoughts.
TonytheTiger

--- On Mon, 2/9/09, jarrid_gross at earthlink.net <jarrid_gross at earthlink.net>
wrote:


From: jarrid_gross at earthlink.net <jarrid_gross at earthlink.net>
Subject: Re: [Alpines] How reliable is an overdrive unit?
To: "#auri" <lehtinen.lauri at kolumbus.fi>, alpines at autox.team.net
Date: Monday, February 9, 2009, 1:27 PM


Lauri,

In my experience even oil condition is not a good indicator for the condition
of the
overdrive, (although oil with brass specks is a very bad sign).

Basically to know if the overdrive hasnt been abused, you have to pull the OD
unit apart
and inspect the sun, planets and anulous gear faces, and also the planet
bearings since
this is a common sign of failure.  Look also for heat discoloration of the
planet carrier
this indicates the bearings have been very hot before.

HTH

Jarrid Gross
Alpines at autox.team.net
http://autox.team.net/mailman/listinfo/alpines

http://www.team.net/archive