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Shifting from 2nd to 3rd while merging into traffic at 75km/h the other morning. Incomplete shift, hand slipped while releasing the clutch... been a few years since I've done that... horrible noise...The bad news: Grinds when upshifting or downshifting into 3rd when the transmission is cold. Something's been damaged...The Good news: Once the transmission is warmed up, even after driving for 5 minutes it shifts fine. Everything works. It also doesn't grind when cold if I double clutch (good talent to know). The gear oil is coming out tomorrow after work if I get home before dark or Saturday. Got my parts retriever pencil magnet to fish around inside the tranny. Going to replace the oil with some 80W-140.Thinking about taking it into the dealer, but It would have to stay there overnight so they could test drive it cold otherwise it'll just be a waste of time.

Huh......shoulda bought an automatic, Ryan...

Quote, originally posted by BlueCrush »Huh......shoulda bought an automatic, Ryan... BITE YOUR TONGUE BRIAN! Ryan is that the oil weight that is suggested by GM/Toyota for the M/T Tranny? Seems heavy?Here's a amsoil link http://www.amsoil.com/mygarage...IBE+8

Quote, originally posted by rmckinjr »BITE YOUR TONGUE BRIAN! Indeed!!! You may have your supercharger but it's connected to your wheels by a rubber band and silicone, LOL!!! 75/90 synth is the stock gear oil weight. I've always ran slightly heavier oil in the gearboxes of all my cars/trucks. It's just like arguing with people over motor oil... I also work with industrial gearboxes everyday and have rebuilt enough of them to know the benifits and drawbacks of running a heavier synthetic oil. I'll be sure to post some pics of whatever comes out of the transmission tomorrow.

I work with that stuff also, but more of an controls guys (PLC, DCS). Back to the Gear oil, not to question your knowledge on the subject but living in a more northern part of North America I would figured you would want a lighter oil in there because of the cold. Now if you lived down by me I could see using the heavier oil. But I'm not going to open this pandora's box on this thread. Hey I just hope it all works out for you! Goodluck

Still deciding.... reading up on the pro's and cons, the technicals specs ect between Redline 75w140NS and Redline MT-90...

I don't see AMSoil up there! LOL You are trouble!

You mean this one? Yeah, it's on the list... but I have to find a place that sells it tomorrow!

Quote, originally posted by star_deceiver »Still deciding.... reading up on the pro's and cons, the technicals specs ect between Redline 75w140NS and Redline MT-90... Best of luck! Missed a gear, bad noises and now shifting problems?? Hmmmm, Magic snake oils rarely fix much! They may mask a problem for a little while but the problem is still there. I guess one can always close their eyes, click your ruby slippers together three times and repeat "I wish my transmission was fixed, I wish my transmission was fixed, I wish my transmission was fixed....."Keep us posted, hope for the best but......Dave

I agree... especially since you state that it grinds ONLY when cold. Heavier weight oil will quite simply take longer to warm up and even then the viscosity will be heavier. You could cause more harm to the already worn syncro by using 140, my friend.Either that, or get used to rev matching.I had a used Opel when I was a lot younger who's 3 and 4th gear syncros were weak/bad when I bought the car. Then I taught my female teenaged neighbor how to drive stick using the car. After that, I learned to rev-match 'cause using the clutch made no difference.

The missed shift happened a few days after I changed the transmission fluid. It also seems more notchy and touchy then it did before. I've bought some cheap GL-4 oil to flush out the transmission and see if anything comes out.Never had the chance to get at it tonight. Quote, originally posted by 06pvibe »I agree... especially since you state that it grinds ONLY when cold. Heavier weight oil will quite simply take longer to warm up and even then the viscosity will be heavier. You could cause more harm to the already worn syncro by using 140, my friend.Either that, or get used to rev matching. Rev-matching is easy on a car that doesn't revhang, ... Double clutching does the trick though!

Changed the fluid today with the cheapest GL-4 rated fluid I could find ($8 for 4L). Going to flush it again in a day or two. My mind in thinking that the GL-5 oil that I put in at the last change didn't cohabitate well with the Redline shockproof that was in there previously.There's nothing steel in the oil that came out. I'm leaving the oil bucket in a corner to see if any brass/aluminum or other non-magnetic metals settle out. On the plus side it didn't grind today, even with some aggresive non-revmatching shifts. There's a vid of it at my youtube channel. The strong pen magnet here was used to fish around the bottom of the transmission wherever it could fit through the drain plug and was was in the bottom of the drain bucket.

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