Switched to MT90 today

Cjanik · 02-01-2010, 08:13 AM

yeah I made the first one work, stupid pump took me 4 hours to fill up the transmission and differential. needless to say, i threw the damn thing away when I was finished.

and for the feel, I seem to get locked out of first gear more often from Neutral. I have to pump the clutch once to line up the syncro's or whatever it does to be able to get into 1st gear. this only happens in the cold.

ChrisSlicks · 02-01-2010, 12:18 PM

Quote:

Originally Posted by Cjanik

and for the feel, I seem to get locked out of first gear more often from Neutral. I have to pump the clutch once to line up the syncro's or whatever it does to be able to get into 1st gear. this only happens in the cold.

This is common, but more so in the cold. The reason is, with the clutch out, the input shaft to the transmission is spinning, when you clutch in the input shaft continues to spin for a second or two from residual momentum which gives you time to select a gear. When the fluid is cold the input shaft will stop spinning very quickly due to the highly viscous fluid quickly robbing the input shaft of its momentum. When the shaft is not spinning it is a crapshoot as to whether or not it will actually engage a gear.

Cjanik · 02-04-2010, 12:01 AM

Quote:

Originally Posted by ChrisSlicks

This is common, but more so in the cold. The reason is, with the clutch out, the input shaft to the transmission is spinning, when you clutch in the input shaft continues to spin for a second or two from residual momentum which gives you time to select a gear. When the fluid is cold the input shaft will stop spinning very quickly due to the highly viscous fluid quickly robbing the input shaft of its momentum. When the shaft is not spinning it is a crapshoot as to whether or not it will actually engage a gear.

ah gotcha, thanks for the explanation.

I thought of two possibilities before: either I did something wrong (i.e. not enough); or I was supposed to mix the MT90 w/ a less viscous fluid. Glad to see its neither!

vipor · 02-04-2010, 08:55 AM

Quote:

Originally Posted by ChrisSlicks

This is common, but more so in the cold. The reason is, with the clutch out, the input shaft to the transmission is spinning, when you clutch in the input shaft continues to spin for a second or two from residual momentum which gives you time to select a gear. When the fluid is cold the input shaft will stop spinning very quickly due to the highly viscous fluid quickly robbing the input shaft of its momentum. When the shaft is not spinning it is a crapshoot as to whether or not it will actually engage a gear.

Did some double-pumping this morning and it made 1st a breeze. Guess I'll have to make that a habit when I first start her on a cold morning.

ChrisSlicks · 02-04-2010, 09:41 AM

Quote:

Originally Posted by vipor

Did some double-pumping this morning and it made 1st a breeze. Guess I'll have to make that a habit when I first start her on a cold morning.

Yeah, I usually have to double clutch 1st and 2nd for the first mile or 2 until things start to warm up. Need an electric blanket for my transmission

1slow370 · 02-09-2010, 03:56 AM

Placed my spring order with redline today so in 3 months i'll be able to tell you how it goes. Picked up some 0w-30, Mt-90, redline powersteering fluid, and water wetter for my 80-20 propylene glycol switch.

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02-01-2010, 08:13 AM	#1 (permalink)
Cjanik Track Member Join Date: May 2009 Location: Las Vegas Posts: 578 Drives: N/A Rep Power: 19	yeah I made the first one work, stupid pump took me 4 hours to fill up the transmission and differential. needless to say, i threw the damn thing away when I was finished. and for the feel, I seem to get locked out of first gear more often from Neutral. I have to pump the clutch once to line up the syncro's or whatever it does to be able to get into 1st gear. this only happens in the cold.

02-09-2010, 03:56 AM	#6 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7252	Placed my spring order with redline today so in 3 months i'll be able to tell you how it goes. Picked up some 0w-30, Mt-90, redline powersteering fluid, and water wetter for my 80-20 propylene glycol switch.