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Can a 150k mile manual transmission oil be in good shape??? #5275148 11/23/19 07:06 AM
Joined: Nov 2019
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Umit Offline OP
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Joined: Nov 2019
Posts: 21
Hi
I checked my Hyundai oil and it dripped pretty yellow.
I was expecting a black colour.
And seemed pretty lubricative with my fingers.

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275152 11/23/19 07:21 AM
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demarpaint Offline
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Maybe, maybe not. Not the answer you were looking for but, without an analysis no one would know for sure. With 150K miles odds are it is spent and due for a change.


God Bless Our Troops

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275153 11/23/19 07:21 AM
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joegreen Offline
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I'm not knowledgeable in this but i am going to assume because there is no filter the manual transmission the oil wants the dirt to settle out making the fluid appear clean. Also different anti wear additives or viscosity modifiers are probably wearing out. I'm sure the gears inside are causing the fluid to shear out of spec

Last edited by joegreen; 11/23/19 07:22 AM.

1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275154 11/23/19 07:22 AM
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Railrust Offline
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I mean, you're probably going to get told to send it out for analysis...that color doesn't mean a thing...follow the owner's manual, etc, etc, etc. But I do think manual transmissions are probably "easier" on the fluid than an automatic transmission.

An automatic transmission fluid has to do more things...it has to perform hydraulic tasks, it runs hotter, it has to allow friction between the clutches, it has to lubricate, and it has to fight heat. The manual tranny has to lubricate and provide protection while supplying smooth shifts. It's generally a "thicker" fluid. It runs cooler. Having said that, I'd change the fluid. You'd spend the same getting an analysis done and changing the fluid isn't going to "hurt" anything, like it might do in an automatic transmission because of the friction qualities.


2018 Chevy Silverado 5.3
2007 Lexus LS460 (deceased)
2008 Honda CRV
(Whatever synthetic oil is on sale or rebate)
Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275177 11/23/19 08:11 AM
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Gebo Offline
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Does the owner's manual give you any instruction as to when to change it?

When I had manual transmissions, I would change about every 30K or when the shifting got a little clunky.

I'd just change it.


'98 LEX LS400 305K
'02 4Runner 250K
'05 Lex LS430 90K
'07 Lex GX470 70K

Shell Gas and Truck 5W-30
QS HM 10W-30
Toyota ATF's and Coolant
Amsoil Gear Oil and Grease
Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275201 11/23/19 08:51 AM
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Posts: 24,111
Mr Nice Offline
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Yep. 30K miles max with a manual transmission.

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275207 11/23/19 09:06 AM
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eljefino Offline
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Saturn recommended a change at 6k (to get initial wear particles out) then never again.

It was of course a mere 2.3 quarts of dexron so a change could be done for under $10.

Trannies don't get screaming hot-- they'd better not-- but if you drain it after a nice highway run the engine heat may have conducted through the bellhousing. This would thin the oil and shake up the junk on the bottom.

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275236 11/23/19 09:37 AM
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FordCapriDriver Offline
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300k+ miles on the manual gearbox in my Capri.

Until 2016 it had never had a single oil change, still going strong with absolutely no problems, i changed the oil in it again this September which improved the shift quality.


1975 Ford Capri II Ghia 3000 V6 - Repsol Elite Super 20W-50
1988 Ford Escort XR3i Cabrio - Repsol Performance 10W-40

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275269 11/23/19 10:18 AM
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Umit Offline OP
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Thx for answers.
To tell the truth i tried to change today but the tool was weak to open drain plug.
I had socket for fill plug so i checked and asked.
Manual says 100k km.
Shifting is a little poor btw 1 2 3 .
So i will buy socket for drain...

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275277 11/23/19 10:25 AM
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aquariuscsm Online Content
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Do standard transmissions truly ever fail? I've never seen it happen.


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 0W20

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: aquariuscsm] #5275291 11/23/19 10:39 AM
Joined: Sep 2017
Posts: 33
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SpitFire6 Offline
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Originally Posted by aquariuscsm
Do standard transmissions truly ever fail? I've never seen it happen.


Hi,
Mine have/do.
On my 5th gearbox in 20 years.
Lost 3 in four years.
My present one has lasted over ten years. a Little noise on 1st. Too expensive to replace at the moment.
Cheers,
Iain.


2002 206 CC 2L 4Cyl. 0W40 FS
1972 Spit 2L5 6Cyl. 0W40 FS
Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275335 11/23/19 11:30 AM
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JHZR2 Offline
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If the oil is at 150k, it’s likely to have wear materials, particles, moisture, etc.

Generally manual transmissions and differentials are considered “bulletproof”. Some of this is likely because they don’t face combustion situations/byproducts, don’t have the shearing and need for providing hydraulic pressure, and so they’re used in a much simpler way. So a relatively simple lubrications approach is sufficient to satisfy the need.

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275459 11/23/19 01:57 PM
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Mr Nice Offline
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Honda had a reputation in the past for input shaft bearings going bad at under 100K miles especially in the Civics even with 30K mile MTF changes.




Re: Can a 150k mile manual transmission oil be in good shape??? [Re: Umit] #5275463 11/23/19 02:01 PM
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benjy Offline
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prolly not good a long time ago but as noted manuals, my choice are longer lasting + durable except for a possible clutch job!! FWD's with shared driveline + tranny juice need more changes like a motorcycle that uses oil for engine + clutch, its your $$$ + DIY is CHEAP!!!

Re: Can a 150k mile manual transmission oil be in good shape??? [Re: aquariuscsm] #5275958 11/24/19 07:08 AM
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ka9mnx Offline
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Originally Posted by aquariuscsm
Do standard transmissions truly ever fail? I've never seen it happen.

I have only dealt with class 8 trucks but, yes, they do wear out. First the syncros, from sloppy shifting, then the bearings follow. Gears usually look like new.


2005 Ranger 3.0 - SuperTech Syn 5w-30/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
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