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July 23, 2010, 06:51:22 PM

When draining the torque converter, does it matter which way you turn the crankshaft to get the drain bolt to align with the drain hole? This is an mn-12 4r70-w tranny

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Reply #1 – July 23, 2010, 08:28:38 PM

Not really , but it is better to turn it the direction it normally turns while running if you are not close

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Reply #2 – July 23, 2010, 08:53:25 PM

what difference will it make if you turn it either way? none... the pistons go up and down in the cylinders the same, now the only real difference would be the wear in the bearings but as far as you are going to be turning it wont make any difference what so ever.

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Reply #3 – July 23, 2010, 09:45:00 PM

I know it was a kinda dumb question guys, I just wanted to be sure before I screwed something up, I changed my tranny fluid over to Mercon V (eeeexxxppeeennsssiivveee) and had to drain a TC for the first time. Thanks for the reply's guys.

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Reply #4 – July 24, 2010, 09:27:47 AM

next time,
just drain your fluid and with the cover / filter off.

simply start your car, put in drive and watch the rest of the fluid dump out.
go to reverse and drive and traped fluid will now be able to come out. This happens pretty much instantly so your looking at 10sec or so of runtime. add a tiny bit of rmp to get more out and quicker.

this way you dont have to drain the converter, let the engine do it for you. You will realize your sucess when your well into your 6th qt and adding more fluid. dont forget to cycle to D and R after adding more (after you add your initial 5qts)

btw, change trans fluid once a year if its your daily driver its cheap and easy PM.

its a good opportunity to drill you a hole and add an auto parts store after market drain plug.

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Reply #5 – July 24, 2010, 04:36:47 PM

Quote from: jcassity;329380

btw, change trans fluid once a year if its your daily driver its cheap and easy PM.

I've always heard that if you're having no issues with the transmission that it's better to just leave everything as is, unless I'm being led to believe and old wives tale :dunno:

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Reply #6 – July 24, 2010, 05:46:20 PM

Gotta change the tranny fluid. Not changing it til there's a problem is crazy.Like changing your oil only when the engine starts knocking.LOL.

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Reply #7 – July 24, 2010, 06:28:41 PM

Unfortunately, I have done that. Now I have quite a bit of blowby even at idle. If I take the hose off my V/C to throttle body, it feels like compressed air.

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Reply #8 – July 24, 2010, 11:50:48 PM

Quote from: vinnietbird;329403

Gotta change the tranny fluid. Not changing it til there's a problem is crazy.Like changing your oil only when the engine starts knocking.LOL.

See, that's why I posted what I did. Sometimes you've got to ask, eh?

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Reply #9 – July 25, 2010, 01:10:07 AM

especially in the temps down south,, but if its not redish anymore, it needs changed.

its too easy to change,, even though 99 percent of us dont have a drain plug to help us out which really sux.

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Reply #10 – July 25, 2010, 12:08:11 PM

Quote from: vinnietbird;329403

Gotta change the tranny fluid. Not changing it til there's a problem is crazy.Like changing your oil only when the engine starts knocking.LOL.

words of wisdom

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Reply #11 – July 25, 2010, 12:11:51 PM

I don't put that many miles on my car but even if I did 15k a year, annually seems a little excessive? Are you guys concerned about the filter or the fluid itself? I assume the fluid in a vehicle with no/small transmission cooler?

I'm all about "whenever I get around to it in a few years", with a large transmission cooler and Amsoil synthetic. Cost is about $100 in fluid for a full drain and refill in a 4r70w.

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Reply #12 – July 25, 2010, 01:10:50 PM

my comments were based on a daily driver ,, some may not think like me if they only put on 15k less a year.

For me as rual and remote as i am, everything is 30-40 miles one way.

I like changing fluid that still looks usable, its not a waste by any means but a way to work your way up to flushing out and flushing in new fluids that over the course of a couple changes actually clean the system out of any debris.

my oil changes are a little aggressive on every 3rd change. I buy 10 qts and drain the old. Add 5 new, run the motor for a while and let it cool down.

drain that 5 new , remove filter and add new oil and filter.

you may not agree but my oil looks better and better and gets dirtly less quickly than when i purhased it. IT took me almost 6 changes over time to get the oil looking like this but now that im here, i know the color of my fluids are perfect.

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Reply #13 – July 25, 2010, 02:19:05 PM

Quote from: jcassity;329477

you may not agree but my oil looks better and better and gets dirtly less quickly than when i purhased it. IT took me almost 6 changes over time to get the oil looking like this but now that im here, i know the color of my fluids are perfect.

Old engines, yeah they can be pretty nasty. I don't have that problem anymore with the rebuilt one but even then, new (quality) oil will get dark long before it's ready to be replaced. Oil buttstuffysis will tell you the true story of everything and I'm a firm believer in extended oil change intervals as long as you use something that doesn't break down very quickly. In quality oils, the TBN seems to be the decided factor on when the oil needs to be changed (unless you have engine issues and are getting abnormal wear from a failing part). In engine oil using Amsoil, I stick with 3k filter changes though, and top off with another quart. I just like doing synthetic transmission fluid about every 50k, even if I don't need to. It'll probably be based on years instead of mileage on the car at the moment though.

The original engine that came out of my car had over 1" thick carbon buildup in the lifter valley - NASTY. Anyways, it seems most people are driving closer to 20k miles/year now days so 1 year is good if the fluid gets very hot, 2 with any normal name brand fluid and a transmission cooler.

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Reply #14 – July 26, 2010, 07:13:29 PM

I have a 120 mile a day (round trip) commute to work, not to mention the weekend trips with the wife and kids to go swimming/camping and trips to the grocery store and everywhere else I gotta go. I've probably put around 120k on my 'bird in the 2 years I've owned it. My bird is my DD and since my truck don't fit 5 it dosen't get used too much. Soooooo,,,,, I change my tranny fluid about twice a year, I've just never drained the TC before since I always used a different fluid.