What oil in 4-speed 1974 99?

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Brian
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What oil in 4-speed 1974 99?

Postby Brian » Wed May 15, 2013 7:13 pm

The factory manual says straight 80, 75 in cold climates but it is not the easiest thing to find in local parts stores. Others have said they run a 10 w 30. What is the consensus here?
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DeLorean
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Re: What oil in 4-speed 1974 99?

Postby DeLorean » Wed May 15, 2013 7:26 pm

10-30 is not good enough in my opinion, 75-90 will work just fine in warmer weather.
Less brake more gas!
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Brian
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Re: What oil in 4-speed 1974 99?

Postby Brian » Wed May 15, 2013 8:41 pm

Well I was reading more of a manual and even though it's not listed on the main table they mention using a GL-4 or GL-5 on the instructions for filling the transmission. So looks like I'll just go with the 75w-90.
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Jordan
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Re: What oil in 4-speed 1974 99?

Postby Jordan » Thu May 16, 2013 6:40 am

Red Line makes an 85 weight that fits the bill pretty well. Might not be available locally, but most places have free or cheap shipping.
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