manual tranny on 1985 635 oil change

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sabershark
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manual tranny on 1985 635 oil change

Post by sabershark »

any suggestion on what oil to use for manual tranny thanks
the time I saw your eyes I fell in love with you my bmw
Alpinacsi
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Post by Alpinacsi »

Redline MTL
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GripGreg
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Post by GripGreg »

Wouldn't the tranny be prone to noise if the fluid isn't at least 80W?
Just askin',,,,Greg
Hit the apex
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Alpinacsi
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Post by Alpinacsi »

MTL = Manual Trans Lube
Alpina B9 coupe (Alpinweiss)
Alpina B9 sedan (Alpinweiss)
Alpina B6 clone in process (Alpinweiss)
Mini S (had to go: it was Electric Blue)
Rover Disco 1 (Alpine White)
Chris Wright

Post by Chris Wright »

IIRC, They make three weights of RedLine MTL now. RedLine MTL85 (85w) has been added to the original MTL (80w) and MTL90 (90w)

Google RedLine for more info.
GripGreg
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Post by GripGreg »

Thanx, Chris, good to know.
But, and not to slight anyone, because I have gotten a lot of great help here,
I know I read, either here or 'FirstFives.Org' that someone drained & filled
their tranny with a lighter grade than recommended by the factory but,
it made too much noise. So, they drained & filled it with a heavier weight & all was well.
I just hope someone with that experience will chime in.
Of course I don't remember what the different weights were!
I know I'm not that crazy,,,,Greg

Ps,,,,I'll go to 'FirstFives' and ask that question,
but, they're not too busy anymore.

PPs,,,,Okay, now, we just gotta wait for an answer. :roll:
Hit the apex
in Long Beach, Cal
Buster/'82Euro6 Build Date 9/81
Rosallina/'80 528i Build Date 4/80
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clipper47
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Post by clipper47 »

When I bought my 85 635CSi the trans had a small leak at the output shaft. The oil was red and appeared to be very light so possibly ATF. I replaced this with Pennzoil Synthetic GL 4 75-90 gear oil and all is well now for two years.
Dave
_____________
1985 635CSi US
Cosmos Blue/Pearl Beige
GripGreg
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Post by GripGreg »

Well, as of now, I've gotten eleven peek-a-boos,,,,,but no replies!
At least they're alive! =D>
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GazM3
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Post by GazM3 »

I use redline MTL also. Works nice with it.

Can u identify what trans it is. As some use different oil and some use auto trans fluid.
BMW’s
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Chris Wright

Post by Chris Wright »

clipper47 wrote: ....... I replaced this with Pennzoil Synthetic GL 4 75-90 gear oil and all is well now for two years.
Where did you find the Pennzoil GL 4 gear oil?
Chris Wright

Re: manual tranny on 1985 635 oil change

Post by Chris Wright »

sabershark wrote:any suggestion on what oil to use for manual tranny thanks
to your original question:

Transmission Oil type, drain and fill:
Manual Trans oil: viewtopic.php?t=10842&
How to fill: viewtopic.php?t=9111&
Manual Trans fill plug: viewtopic.php?t=10451&
What ever happened: viewtopic.php?t=1561&
Why GL4: viewtopic.php?t=6133&
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clipper47
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Location: Ontario, Canada

Post by clipper47 »

Chris Wright wrote:
clipper47 wrote: ....... I replaced this with Pennzoil Synthetic GL 4 75-90 gear oil and all is well now for two years.
Where did you find the Pennzoil GL 4 gear oil?
Chris, I bought the oil at NAPA.
Dave
_____________
1985 635CSi US
Cosmos Blue/Pearl Beige
janusz200
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Mannual tranny - hard shifting when cold

Post by janusz200 »

Since I've bought my 1980's 635 CSi with sport manual transmission I got hard shifting after start up in between 1-2 and 2-3. When warmed up after few minutes driving the shifting is smooth enough for me except reverse. Gear box is filled up with Valvoline 80W-90 - it's all I know about the fluid. No idea about API class (GL 4 or 5) nor oil base - supposly it's mineral.

It took me 2 evenenigs to do my homework suggested by Chris (links to bigcoupe and bimmerforums). I'm not the top student and like to ask for advises which oil will solve the problem of cold hard shift not giving the noisy work after warming up or excessive leakege. I've checked some oils available at domestic market (excepting Redline) - for the main features see attached table. Which one is the best for me?

When oil meets both GL-4 and GL-5 specification it's safe for "yellow metal" parts in the gear box - am I right?

Low viscosity @40°C will provide smooth shifting after start-up and higher viscosity @100°C will couse more silent work - am I right?

Higher Viscosity Index means the better oils is - right?

Due to avoid the leakege Miller's semisynthethic should be OK but the temptation is to use synthetic Shell Spirax or Motul Gear 300 - low viscosity when cold and higher when heated up. The german producer Ravenol recommends Ravenol MZG mineral 80W to use at mid 80's BMW 6ers.

I'll be thankful for advises.
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wjtesquire
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Post by wjtesquire »

Brad Penn classic gear lube, nothing else!
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Bat 1
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Brad Penn

Post by Bat 1 »

Plus 1 on Brad Penn, GL-4 and GL-5, transmission and diff. And my Six is also a 1985 manual.
1985 635CSI Manual
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wattsmonkey
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Post by wattsmonkey »

MT90 for me, accept no substitute!
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