I recently installed a jspec swap and at first filled the tranny with 80/90 gear oil.
It was very hard to upshift and almost impossible to downshift.

I read all about the synthetics on here and decided to use Redline MTL. I decided on the MTL because I wanted it to shift good when it was cold too and it really worked.

I noticed an immediate improvement in synchro operation. After about a hunderd miles it shifts beautifully even when cold.

Just though I'd post my successful results of changing from the regular gear oil.

 

yeah all i hear is good results from using redline, might have to try using it in one of my NA which is gettin a bit "notchy" to shift

 

Note using the correct Redline gear oil for the rear differential & transmission (2 different types) will DRASTICALLY improve cold performance (ie bogging down).

If you mix it up & use the wrong type of Redline in the diff or trans, it will be a bit worse though.

 

anyone got a link to where to find redline products. I'm being lazy

 

LOL - For lazy people, try these links:
www.rx7club.com/search.php?
www.google.com

That would bring you to:
www.redlineoil.com

Note Redline is mostly carried in speciality shops.

 

haha thanks I and the rest of the lazy thank you