gearbox oil

bmcecosse · Postby **bmcecosse** » 03 Oct 2009 18:32

Mine is on EP75/80 - as per manual. Yes - the first change from 1st to 2nd in the morning has to be done slowly - after that - it's fine!

saabfast · Postby **saabfast** » 03 Oct 2009 19:54

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by harvey

[quote][i]so use Dexron II ATF to spec M2C 33G (by Comma) as in the Handbook. <hr height="1" noshade id="quote"></blockquote id="quote">

Dexron II can't meet M2C-33G spec because that spec is specifically NOT Dexron type. I wouldn't use Dexron type fluids because they have friction modifiers in them which could affect the operation of the synchros. M2C-33G however doesn't have the modifiers in it, and doesn't get as thin when hot as the Dexron does, and that is what I have always used, and will continue to do so.
<hr height="1" noshade id="quote"></blockquote id="quote">
I will have to check what is in the garage (a few miles away). Stand corrected if it is not DII, I know I looked for the stated spec. (May be stated in error as I use DII in the Saab).

Alan
Saab 9000 Stg 1
Saab 9000 2.3 FPT Auto
'81 TR7 DHC

macmattom · Postby **macmattom** » 03 Oct 2009 20:08

So would any ATF do, or is there a prefferred choice? I'm leaning towards the Castrol SMX-S as I've seen that around, but is that a decent ATF? If not, what is good but, importantly, readily available?

I know opinions will vary, but they also help those of us new to the game make our own minds up.

Cheers,

Mac.

The pheonix rises from the ashes - just give it time!

http://s733.photobucket.com/albums/ww338/macmattom/

Beans · Postby **Beans** » 04 Oct 2009 11:57

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by macmattom

... I'm leaning towards the Castrol SMX-S as I've seen that around, but is that a decent ATF? <hr height="1" noshade id="quote"></blockquote id="quote">
It's definately not an ATF and I recommend it [:)]

http://tr7beans.blogspot.com/2007/08/more-10cr-preparations.html

<center>

1981 TR7 FHC Sprint (better known as 't Kreng)
1980 TR7 DHC (my first car currently being restored)
In parts a 1980 TR7 PI DHC, 1981 TR7 DHC, 1981 TR7 FHC
http://tr7beans.blogspot.com/</center>

saabfast · Postby **saabfast** » 04 Oct 2009 13:53

I stand corrected, the oil I use is Comma AQF (not Dexron II). It is to the (Ford) spec M2C-33G. I have not had a problem and it is only about Â£15 for 5 litres from the local factor.

Alan
Saab 9000 Stg 1
Saab 9000 2.3 FPT Auto
'81 TR7 DHC

mitchelltjohn · Postby **mitchelltjohn** » 05 Oct 2009 00:06

I listened to all the Castrol SMX-S recommendations on this forum and drained perfectly good ATF to fill with the expensive synthetic. And my expereince: SMX-S is definitely worse at cold, 2nd almost impossible to select. Slightly better 2nd grear selection when warm but that wasn't a problem I was trying to solve. Also I can't be sure, but I not happy with the sound coming from my tranmission over 70mph. If I could be bothered I'll be changing back to ATF and someone else have have 2liters of barely used SMX-S to play with!!

standard 1981 DHC

harvey · Postby **harvey** » 05 Oct 2009 15:07

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by saabfast

I stand corrected, the oil I use is Comma AQF (not Dexron II). It is to the (Ford) spec M2C-33G. I have not had a problem and it is only about Â£15 for 5 litres from the local factor.<hr height="1" noshade id="quote"></blockquote id="quote">

M2C-33G spec. fluid is also the only one to use if you have a car fitted with a BW65

Anonymous

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