I had a manual tranny 85 GL and currently running a manual tranny 88 GL.
Both have been run for untold miles on the Redline MT90. I made the
switch on the 85 GL when the tranny was re-built. I went to MT90 in the
88GL because of shifting issues. Problems instantly solvd as soon as the
Redline MT90 was installed.

My $.0.02.

John Rodgers
88 GL Driver

Don Hanson wrote:
> Changing mine.  Redline MT-90?  Right?  5sp manual, probably from a diesel.
> Currently running some Valvoline synthetic of some sort with no real issues
> of noise or shifting.
>
>
>