ConcoursMustang Forums
Restoring - General discussions that span across many different groups of years and models => Drivetrain => Topic started by: 65fastbk on December 17, 2013, 12:02:05 AM
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Hi,
What's the best rear end gear and transmission oil to use on my 65 mustang. It's a 4 Speed top loader, and 3.89 gears open end!
Thx
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I've been using Redline synthetic gear oils for many years. Their M/T-90 is made specifically for older manual transmissions, I use the 75W-90 in the rear end.
Dave
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I use the Mobil 1 75w-90 or the Mobil 1 75w-140 when I know the car will see some hard use. Been using them for over 15 years / 180,000 miles without any measurable wear in both toploaders & T-10 transmissions. The same lube in the rear end as well.
Z.