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Change Transmission Oil?

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Change Transmission Oil?

Post by Etohboy on Fri Oct 26, 2012 9:40 am

I have one of the 81 white Corona wagons that is mated to a 5 speed (not sure if it's a W50, since it was switched out before I bought it). My first question is, how do I know what tranny I have? My next question is, how do I go about changing the oil and what oil should I be using? Thanks for any help!
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Re: Change Transmission Oil?

Post by a2ndopinion on Fri Oct 26, 2012 11:45 am

IIRC, the W50 is the only steel cased W series trans, so that would be a start - just grab a magnet. If it's an aluminum case, then your stuck counting engine to trans output revolutions in different gears trying to compare it to different ratios of the like six different possibilities of aluminum cased W trans.
As for changing the oil, go for a drive, especially pulling some hills, in lower gears preferably to get it good and warm, then pull the plug on the bottom of the trans and drain it out - and plug your nose! There is a fill plug almost half way up on the side of the case that is either a square head, or uses a 3/8" drive ratchet to remove. You fill it until the fluid dribbles out the fill plug hole.
Any "gear oil" works, but the synthetics are the better bet for smoother shifting. Oil weight depends on the local temperatures and how hard you'll be on it. The 80/90 range is what your looking for, but there are multigrades going all the way from like 70 to 140. The higher the number, the better the heat resistence. For those of you in very cold climates, adding about a pint of ATF can make shifting easier when its down around or below freezing.

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DD -'81 Corona wagon - 22R hybrid P&P, Crane stage 3, Si valves, Erson springs/retainers, Weber, Cannon, MSD, Thorley, Borla, 3rd gen Celica front suspension, Cressi Big Brakes, coilovers, Camber plates, RCAs, AGXs, Addco, all urethane bushings, Hilux leafs...
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Re: Change Transmission Oil?

Post by Etohboy on Fri Oct 26, 2012 12:01 pm

Thanks! I'll give it a go this weekend. I was also think of pulling off my catalytic converter and going with a glasspack (cheap and easy). What are your thoughts?
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Re: Change Transmission Oil?

Post by a2ndopinion on Thu Nov 01, 2012 12:31 am

A good high flow cat like the Magnaflow I got through Amazon for like $46 including shipping doesn't hurt flow and is very good for the air. I'm not a tree hugger, but I do like breathing air.
For a "glass pack" type muffler, try the Dynomax Bullet. Very high flow, low restriction, deep sound, and available in a variety of lengths and diameters. Summit Racing has about the best price.

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DD -'81 Corona wagon - 22R hybrid P&P, Crane stage 3, Si valves, Erson springs/retainers, Weber, Cannon, MSD, Thorley, Borla, 3rd gen Celica front suspension, Cressi Big Brakes, coilovers, Camber plates, RCAs, AGXs, Addco, all urethane bushings, Hilux leafs...
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Re: Change Transmission Oil?

Post by Etohboy on Thu Nov 01, 2012 9:35 am

I got under the car the other day and tried to work at the car bolts-way too rusted! I guess I'll hold off till spring to do anything more with the exhuast (working under a car in Montana isnt that fun in the winter).
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Re: Change Transmission Oil?

Post by a2ndopinion on Thu Nov 01, 2012 10:31 am

I hear ya, it isn't much better here just because it's so wet.

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ASE certified: Master Auto, Truck, Machinist & Collision Repair/Refinish Tech/Damage Estimator, Undercar & Parts Specialist, Service Advisor; Oregon Certified Vehicle Appraiser
DD -'81 Corona wagon - 22R hybrid P&P, Crane stage 3, Si valves, Erson springs/retainers, Weber, Cannon, MSD, Thorley, Borla, 3rd gen Celica front suspension, Cressi Big Brakes, coilovers, Camber plates, RCAs, AGXs, Addco, all urethane bushings, Hilux leafs...
20/22R/RE & Celica Guru, 2nd & 3rd gens - GT-Ss - 'vert, coupes & liftback... & Chevy fanatic
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Re: Change Transmission Oil?

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