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#3382263 - 05/27/14 03:41 PM Re: Synchromesh Manual Transmission Lubricants [Re: MolaKule]
MolaKule Offline


Registered: 06/05/02
Posts: 14498
Loc: Midwest
The discussion here is focused on Manual Transmission Lubricants for Automobile and Light Truck applications.
_________________________
Good health is merely the slowest possible rate at which one can die. smile

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#3394417 - 06/10/14 10:11 PM Re: Synchromesh Manual Transmission Lubricants [Re: MolaKule]
benjy Offline


Registered: 08/23/10
Posts: 142
Loc: pa
in my O2J VW 5 spd 2001 jetta i switched to Amsoil series 2000 prolly about 2005. after about 50,000 shifting became poor, could barely get into 5th gear 90 some thousand miles. trannys were known for syncro issues, i changed to MT-90 and shifting got better + better after 2,000 miles worked decent until i ripped the teeth off 5th gear, 30,000 later. got it rebuilt and shifted well until i traded at almost 200,000 miles still with MT-90. traded on a 37,000 mile TT O6M 6 speed, shifting a little rough i put MT-90 in it, shifts great, changed all the fluids due to age! i surely believe in MT-90

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#3486726 - Yesterday at 09:58 PM Re: Synchromesh Manual Transmission Lubricants [Re: MolaKule]
Rand Offline


Registered: 08/20/03
Posts: 7474
Loc: Akron,Ohio
Since this whole topic is an epic resurrection of oldness.

I'll throw in my 2 cents and keep it going.

Most of the above doesn't apply to any awd subaru and some porche MT's as they are a transaxle and share the gear oil with hypoid gears.

as such they require a gl-5 which can cause poor shifting if you choose badly.


Some gear oils are dual rated gl-4 and gl-5 but almost always they will cause decreased shift performance if gl-5 isn't required.


Finally, its 2014 and some car manufacturers are going somewhat exotic. Many seem to have some OEM brew fluid that's 30$/qt. Sometimes a different one for different car models in their lineup.

Subaru starting in 2014 with their revised Forester MT
(6th gear added to older 5mt design IIRC)

Factory fills with Subaru Extra MT which is a 75w80 gl-5 MT oil.


Edited by Rand (Yesterday at 10:00 PM)
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