Main shaft, Transmission...New vs. Old...

B

bigdogtech01

Well-Known Member
Not sure if anyone has posted pics of the Old Main shaft vs. the Newer in the DSSC 6 spd Right side drive Transmissions....if so, then my apologies :)

Otherwise, here are some pictures of what to look for to determine what is old and what is new. To start with, these shafts were produced from late 2004- to early 2006 transmissions. You can do an easy check by looking at the right side of the transmission, top of the case. There will be a set letters and numbers, reading from left to right.
-The first letters stand for the Baker part Number... Ex( AA )
-The second letter stands for a revision... Ex ( G )
-The first Number stands for the year produced... Ex ( 08 )
-The third set of numbers will be the day it's built... Ex (186)
-The last numbers are the Daily Build sequence...Ex ( 5 )

So a transmission with number AAG0818605, was built on the 186th day of 2008.

If it has an 04, 05 or early in the year 06, it most likely will need the updated shaft.
To verify if it does need one (unless you know for a fact it has already been replaced and updated) you can look at the end of the Main shaft ( Input side ) inside the primary.

Here are some pictures to help show what to look for.


This picture shows new M/S on the LEFT, and old M/S on the RIGHT...Notice how the new (Left) has threads that go all the way up to the splines, with no gap. The Old ( Right) has a small gap so because of this, the threads are not cut all the way up to the splines


If you happen to have the shaft out, the Newer M/S will show this part number


The OLD M/S will show this part number
 
Little-Boo

Little-Boo

Well-Known Member
Troop Supporter
Thanks Andrew, I will check mine once I take it off the Bike, I still have not installed the Tranny you did for me. Have not had time to do anything on the bike. Work , work or sick and work you name it, but eventually I get it done.

Carlos :whoop:
 
B

bigdogtech01

Well-Known Member
Brew said:
Great info, was wondering what the difference was...:D :2thumbs:
Click to expand...
Yes, that's the visual difference between the two. The actual difference is in the hardening of the shafts. The older one that has been known to fail is too hard. During a hardening process of metal, if it's heat treated and becomes too hard, it can become brittle. Almost like a Carbide cutting tool that we use for milling. It's very hard, hard enough to mill threw cold/hot rolled steel and aluminum, but if you were to take that end mill and throw it on the ground, it can shatter. I know that's an extreme example, but the hardening process of metal is very important in every application.
 
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