ps you said you put syncromesh fluid in there. BAD idea. they take type f atf. I believe i saw on this forum that syncromesh will screw your trans up in a hot second.
You might have read what I have said and experienced.
I know this thread is a few months old, but I ran across this in a search and just wanted to add information that I felt was left out.
I have used Synchromesh and not long after that time, I too blew my stock differential like the thread starter [have blown a number of differentials]. Using this fluid will not potentially damage anything else in the transmission, but it will help decrease the amount of **** that reaches the internals of the stock differential due to its extreme viscosity[thickness].
With the recommended fluid from the factory, the stock differetial does not have efficient ****. The result is a blown differential. By using Synchromesh, you potentially run the risk of blowing a stock differential because the starvation of fluid with the recommended fluid being increased with the usage of a thicker fluid [Synchromesh]. If you have a Quaife, WaveTech, or Reinforced Differential, it's no longer a problem for the transmission.
Yes, Synchromesh has been used successfully by others, but how many of them are running stock differentials? That's the big question. The thread starter was running a stock differential with Synchromesh. We don't know if the differential already had underlying problems from fluid starvation that the Synchromesh could have contributed to, but it's definately not out of the question.
Many SHO owners use Synchromesh to cure shifting problems. It works. However, there is a risk in my opinion if you are running Synchromesh. The best thing to do is get your differential reinforced, install a Quaife/WaveTech, or fix the real problems causing the shifting issues.
