Shifting problem
12-09-2008, 10:38 PM
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Shifting problem
I just changed my trans oil with redline MT-90 and now I'm having problems downshifting to 3rd and 2nd. when i downshift to 3rd and/or 2nd, sometimes it shifts smoothly and sometimes it doesnt go into gear all the way like it gets blocked half way. I'm not really sure what the problem could be but I think it's either my synchros or the forks. pls help
12-29-2008, 09:44 PM
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12-29-2008, 10:02 PM
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after about 5 min of driving when the car is cold, the transmission is like butter, but during those 5min I can't downshift into 3rd or 2nd. I know that your supposed to let the tranny warm up to get the smooth shifting, but the redline lube takes longer than the stock. I talked to a couple guys last night at a "walmart meet" and I was told to change the trans oil again still using MT-90 and that this time I should over fill it just a little and that this would fix my problem. Has anyone else heard or tried this?
12-30-2008, 09:29 AM
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There are a few problems that must be addressed;
1) How is the clutch pedal free-play cold versus warm? Does it change as the chassis of the car warms up (as opposed to simply as the engine warms up)?
2) How many miles on the car?
3) BHR suggests street-driven RX-8s use Mobil 1 75W90 or, if you can find it, a GL-4 fluid. Racing fluids are not typically good for the street.
4) Does the clutch pedal make any noise as you push it?
1) How is the clutch pedal free-play cold versus warm? Does it change as the chassis of the car warms up (as opposed to simply as the engine warms up)?
2) How many miles on the car?
3) BHR suggests street-driven RX-8s use Mobil 1 75W90 or, if you can find it, a GL-4 fluid. Racing fluids are not typically good for the street.
4) Does the clutch pedal make any noise as you push it?
2) 72K
3) My RX-8 is my only car, daily driver, autox, and drifter. I was told not to use the Mobil 1 75W90 because it is a GL5 and that GL5 is not good for the brass parts in the trans.
4) No
12-30-2008, 10:41 AM
#7
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some gl-5 use a sulfer additive to obtain the gl-5 rating. that sulfur was what is bad for the yellow metals. however if the GL-5 does not have that sulfur it is fine- and will most likely be noted on the label
this mobil1 LS gl-5 75-90 has the sulfur and i wouldn't recommend it for the tranny
http://www.mobil.com/USA-English/Lub..._LS_75W-90.asp
and neither would Mobil
this mobil1 LS gl-5 75-90 has the sulfur and i wouldn't recommend it for the tranny
http://www.mobil.com/USA-English/Lub..._LS_75W-90.asp
and neither would Mobil
Thank you for your inquiry,
Mobil1 LS 75W90 gear oil is an API GL-5 rated and should not be used in manual transmissions that require an API GL-4.
--
Thank you for choosing ExxonMobil products.
If you need further assistance, please contact ExxonMobil at 1-800-ASK-MOBIL
-Matt Jacob
Mobil1 LS 75W90 gear oil is an API GL-5 rated and should not be used in manual transmissions that require an API GL-4.
--
Thank you for choosing ExxonMobil products.
If you need further assistance, please contact ExxonMobil at 1-800-ASK-MOBIL
-Matt Jacob
12-30-2008, 11:14 AM
#9
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any gl-4 75-90 id say in particular
royal purple maxgear which meets gl-4 and gl-5 with no sulphur http://www.royalpurple.com/gear-oil.html
or amsoil http://www.amsoil.com/StoreFront/mtg.aspx?zo=515729
or redline mt90 http://www.redlineoil.com/products_g...7&categoryID=7
but pennzoil and mobil etc all make gl-4 75-90 that will do if you need to pick it up at the department store auto department
redlines gl5 75-90ns may be no sulphur but its hard to digest from their site and a chat is needed to confirm
royal purple maxgear which meets gl-4 and gl-5 with no sulphur http://www.royalpurple.com/gear-oil.html
or amsoil http://www.amsoil.com/StoreFront/mtg.aspx?zo=515729
or redline mt90 http://www.redlineoil.com/products_g...7&categoryID=7
but pennzoil and mobil etc all make gl-4 75-90 that will do if you need to pick it up at the department store auto department
redlines gl5 75-90ns may be no sulphur but its hard to digest from their site and a chat is needed to confirm
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