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Re: [Mgs] 90w in Transmission?

To: "MG List" <mgs@autox.team.net>
Subject: Re: [Mgs] 90w in Transmission?
From: "Bob Donahue" <bobmgtd@comcast.net>
Date: Mon, 4 Aug 2008 17:14:31 -0400
I've always found heavier oil to be helpfull in an old trany with worn 
snycros. Am I wrong?

Bob Donahue (Still Stuck in the '50s)
Email - bobmgtd@comcast.net
Cars:       52 MGTD - #17639
               71 MGB - #GHN5UB254361
Member:  NEMGTR #11470
               NAMGBR # 7-3336
               Hoosier MGB Club
               Olde Octagons of Indiana

----- Original Message ----- 
From: "Richard Ewald" <richard.ewald@gmail.com>
To: "Dodd, Kelvin" <doddk@mossmotors.com>
Cc: "MG List" <mgs@autox.team.net>; <mg-mgb@yahoogroups.com>
Sent: Monday, July 21, 2008 1:15 PM
Subject: Re: [Mgs] 90w in Transmission?


> Been there done that.  I would change it.  With the engine cold, even in 
> the
> summer, the 90W will be too thick for the snycros to work properly.  Ask 
> me
> how I know this.
>
> I agree that once the trans is warm it will probablly work OK, but I would
> be worried about eating up the syncros during the time the trans is
> shifting.
>
> Kevin, 90W is not that much different in viscosity from 30W engine oil?
> What?  Maybe you have better go try pouring a litttle of each out at room
> temp.  90W is way thicker.
> Rick
>
>
>
> On 7/21/08, Dodd, Kelvin <doddk@mossmotors.com> wrote:
>>
>> Dan:
>>
>> If I had done this to my own transmission, I would just leave the 90W in
>> it.
>>
>> I'm doubting that you plan on driving the car during the winter, so
>> unless you find the shifting is really stiff I would not worry about it.
>>
>>
>> The 90W is not going to hurt the transmission at all. In really cold
>> weather, you may find that shifting is slightly stiffer but 90W gear oil
>> is not that much different in viscosity from 30W engine oil.
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