90 B2200 help

[canucksfan1]

So while i am finishing up my 86 gmc high sierra build i am driving a little 1990 mazda b2200, which i am actually really liking driving (mostly cuz i get double or maybe even triple the mileage then i did when i had my big blazer)

Anyway my problem is when i shift gears. At low speed and low rpm it shifts fine, and when it's warm it shifts fine. The problem is at high speed, high rpm, and while it is cold that is is difficult to shift up or down. I dunno if it is the clutch or the syncros (never worked on a standard before, i have rebuilt an automatic tho (th350))

So what should i look for or change??? i don't wanna spend $150 bucks on a new clutch only to find out mine is still good. It feels good but like i said i have never worked on one, or drivin a truck that i knew the clutch was bad on so i have nothing to compare the feeling to.

Oh and i changed to fluid too didn't help any but it was pretty black, not really any noticable metal shavings that i could see.

[canucksafari]

Synthetic gear oil may solve your problem.

[canucksfan1]

I heard using heavy duty 50 weight motor oil can help out with this problem could this be a good idea????

[Lone Ranger]

I would think that if it is an issue with your clutch/slave, then it will be worse when its warm, not cold. I would think that your 2200 probably has a common tranny with the Rangers, so it'll be the usual Mazda or T/K variety. I would try synthetic as I've had good luck with the in my previous T/K's. If its ATF based then it won't make much of a difference. LR

[canucksfan1]

mazda recommends 80w90 gear oil so i am thinking about trying 75w90 synthetic, or straight 50 heavy duty engine oil (i have heard some performance places use that as it is beeter for transmissions, and transfer case, as appose to gear oil which should be run in the diffs.)


nevermind straight 50 engine oil is the equivalent of 90 weight gear oil, so i guess the 75w90it is

[fliptuner]

Read up on GM Syncromesh

http://www.stealth316.com/2-pennzoil-synchromesh.htm

A lot of VW, Mits and Honda guys swear by it. I had a problem getting into 1st on my Golf. Used OE synthetic and had the same problem. Switched over to non-modified Syncromesh and now I don't have to shift from 2nd to 1st at a dead stop.