WHY?
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
WHY?
I cant say for sure , But I suspect its for a couple of reasons ... One , Atf flows better at cold temps compared to a 70 or 80W gear oil . Plus a lot of manaul transmissions are aluminum ( M5OD) for instance & I think the Atf disipates heat better . These are the only reasons I can think of for the Atf use ?
Thread Starter
|
Post Fiend
Joined: Jan 2000
Posts: 5,860
Likes: 4
From: Metro Detroit (Redford)
WHY?
I suppose it is another question for my Ford-engineer neighbor. When I had the tranny on my '84 F150 inspected at 90,000 miles the man at the tranny shop (an experienced old timer) told me to refill the tranny with 10w40 motor oil. That truck shifted nice and easy on the coldest of mornings. That oil has been in there about 10 years and 85,000 miles and still running strong. I agree that ATF is good at dissipating heat, esp synthetic, but it sure is thin! I wonder if anybody is running something else in their Mazda 5 speed. I am running 20W50 motor oil in mine since about 500 miles ago. That ATF business rubs me the wrong way.
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
WHY?
Ive run Mobil 1 Syn fluids from the engine to the rear axle for 10 yrs , no trouble with any of them . Another thought may be the synchronizers do better with the Atf ? Bottom line , I think one can run most any quality lubricant in the M5OD & they still do well .
Thread
Thread Starter
Forum
Replies
Last Post
doubledee715
Vendor Specials, Discounts, Product Announcements & Group Buys
4
Apr 16, 2008 01:14 PM
Stingray42
General NON-Automotive Conversation
4
Jul 3, 2003 05:54 PM
