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Re: TSB-91-00-0003 (adding friction modifier to the manual transmission) [Re: Mudraider] #1036241 10/20/11 03:13 PM
Joined: Jan 2004
Posts: 2,413
martinez
dadrab Offline
Body Damage is Cool
Quote
...but really scared of the thing the way everyone bad-mouths the manual.


I've a a manual 2.6 for almost 24 years - the same one. Don't beat the hell out of it, but it's not that bad a tranny. It's just not as bullet-proof as the other incarnations.

I've had mine rebuilt once in 245,000+ miles.

87 Montero, bought new, by me -
88/89 intercooled Starion Turbo engine-
with awesome audio.
Re: TSB-91-00-0003 (adding friction modifier to the manual transmission) [Re: dadrab] #1036242 10/20/11 03:57 PM
Joined: May 2005
Posts: 927
San Jose, CA
8
89IsMine Offline OP
Rock Warrior
*****
Here's a link that Kevin C. posted a couple of years ago to an article that explains why the friction modifier should be added

Interesting read... (executive summary: paper-lined syncros <img src="/forums/images/graemlins/zombie.gif" alt="" />)

Eric W.

'89 Dodge Raider -- 3.0L V6, MT, SWB
Re: TSB-91-00-0003 (adding friction modifier to the manual transmission) [Re: 89IsMine] #1036243 10/20/11 05:10 PM
Joined: Jan 2000
Posts: 16,227
Bay Area, CA
off-roader Offline
Web Wheeler
*****
Quote
(executive summary: paper-lined syncros <img src="/forums/images/graemlins/zombie.gif" alt="" />)


To clarify further...
Quote
All 5 forward speeds are in constant mesh and synchronized. The 1-2 synchro rings are paper lined. The 5th-and-reverse synchro assembly is on the mainshaft. Reverse uses a conventional idler gear, and the reverse gears are helical cut for quiet operation. The lubricant specified for this trans is API GL-4 or GL-5. Because of the paper-lined synchro rings, a friction modifier should be added to the lube fill. One bottle of friction modifier, Mitsubishi part #ME581050, should ensure smooth shifts.

Off Roader
98 Montero with the Winter Package
89 Montero minty clean and reserved for overlanding trips or Cars and Coffee events
96SR (3.15:1 xcase, 35's) gone to the rust gods
96SR Build Up Thread
Old web page
Old web page
Re: TSB-91-00-0003 (adding friction modifier to the manual transmission) [Re: off-roader] #1036244 10/20/11 07:21 PM
Joined: May 2005
Posts: 927
San Jose, CA
8
89IsMine Offline OP
Rock Warrior
*****
Quote
Quote
(executive summary: paper-lined syncros <img src="/forums/images/graemlins/zombie.gif" alt="" />)


To clarify further...
Quote
All 5 forward speeds are in constant mesh and synchronized. The 1-2 synchro rings are paper lined. The 5th-and-reverse synchro assembly is on the mainshaft. Reverse uses a conventional idler gear, and the reverse gears are helical cut for quiet operation. The lubricant specified for this trans is API GL-4 or GL-5. Because of the paper-lined synchro rings, a friction modifier should be added to the lube fill. One bottle of friction modifier, Mitsubishi part #ME581050, should ensure smooth shifts.


...and to clarify even further, TSB-93-22-001 states:

Purpose

The manual transmissions/transaxles in Mitsubishi Motors vehicles require the use of API GL4 classification gear oil. Using an incorrect API classification gear oil may affect the shift effort and may cause transmission/transaxle component damage.

Use only gear oils having the API classification GL4.

Mitsubishi Diamond Gear Lube - A991ZC2X01 -- SAE 75W - 85W GL4, meets this requirement.

CAUTION: Do not use gear oils having the API GL5 classification. GL5 oils have additives which many chemically react with sintered copper synchronizer rings leading to manual transmission/transaxle damage.


So, sounds like GL4 gear oil plus a friction modifier is what my version of the V5MT1 transmission wants <img src="/forums/images/graemlins/smile.gif" alt="" />

Eric W.

Last edited by 89IsMine; 10/20/11 07:23 PM.
'89 Dodge Raider -- 3.0L V6, MT, SWB
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