Since the syncromesh is designed for the manual trans, that's all I would use, but that's just conservative me. Looks like there's a variety of opinions on what various concoctions to put in there, but what's the long term effects? I'm sticking with pure syncromesh, but that's just me.

 

My real question is whether Synchromesh is its own oil or is it an additive? Also, how much do I need. I hate to be a lush, it's just that I'll be on leave and would like to get this stuff together beforehand.

 

Please, someone just fill me in on Synchromesh. Is it an additive to the oil or do I need 2.5 quarts of the stuff?

 

Does anyone know that answer to this?

 

I don't know, but I've heard MANY good things about the Red Line MT-90, and in fact bought myself some yesterday.

That nut on the bottom is a B*TCH to get off! I still haven't figured out how.... I have the proper (1") socket and wratchet, but it either slips off the bolt, or doesn't budge..

I would personally stick with either 75W90 oil or redline. I wouldn't touch the ATF, just in case :P I figure, it's your transmission, one of the most expensive single components in your car. Get the good stuff... Sure RedLine was damn near impossible to find around here, and sure it cost me 40$ canadian.. but I'm not gonna have to replace it for years, and it's specifically made for our types of manual transmission.

Why take chances?

As for filling, the IV idea is awesome, but I have the hand pump, so I use it instead.. Used it for rear diff, that worked well, but if only I could get that DAMN BOLT off the bottom.

Jon

 

GM syncromesh is tranny fluid. You buy it by the quart at any GM dealer, anywhere from $7 to $10 a quart. You'll need about 2 1/2 quarts. Just replaced a tranny in a 2nd gen with a used one, the guy put regular fresh tranny fluid it in. My son drove it for about 100 miles, complaining it was very hard to get into first and would scratch on quick changes 2nd to 3rd. I drained it and put in syncromesh, almost instant improvement. Shifts like a new tranny now.
Good stuff!

 

getting back to the original question, an Air hose usually fits over the nozzel in the gearbox oil bottle, get about 5 ft of it, stick 1 end in the oil filler hole, the otehr on the nozzel of the bottle, instead of letting gravity of squeezing the bottle, punch a small hole in the bottom of the bottle and if your lucky enough to have an air compressor around, pump it up to about 4 or 5 PSI, the entire bottle will flow into the gearbox in about 2 mins!

Ps, dont use more than 5 PSI, those botles are pretty week, and the hose wont like staying on either, then you will have to spend a few hours cleaning gear oil off you enigine and engine bay!

 

Aaron Cake has a good write up on how to change the tranny fluid you might find interesting.
http://www.aaroncake.net/RX-7/transfluid.htm

 

A tip: use a six-point socket to get the drain plug out.