1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

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1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby oldschool1 » Sun May 01, 2016 10:28 am

1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Yup.
I cooked another one.
This post is to show owners how a pin hole can cost you $3,000.00
OLD SCL3, my 1990 Lincoln Mark VII LSC SE in Titanium, had a pin hole in the timing chain gasket. I ignored it over the winter and just kept adding anti-freeze. Somewhere around the first day of Spring, the transmission coughed up three gears. The car officially only had 1.5 gears:
forward in first
reverse but only at about 2000 rpms
Fortunately, one of my spare transmissions is at the Mechanic's shop so the job is going smoothly. To get to the timing chain cover gasket, all of the accessories in front of it had to be removed. The 160,000+ mile timing chain had slack in it so I had that replaced at the same time.
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby CDW6212R » Sun May 01, 2016 10:10 pm

What ... huh, what's a timing chain gasket, and how does that affect the transmission. Is it April 1st again, I thought this was May 1st?
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby oldschool1 » Sun May 01, 2016 11:22 pm

I was too tired to post and should have known better Don. 16 hour shifts will do that to me.

Timing chain cover gasket.

hehehe

Yeah, I was NOT paying attention. I'm currently battling an image posting issue so I'm tired AND my eyes hurt.
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby CDW6212R » Mon May 02, 2016 3:24 pm

Okay, you stopped driving the trans quickly, so it should rebuild and last a long time again. Is nothing hurt besides the normal clutches and bands? Is the planetary okay, you posted close pictures of it?
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby oldschool1 » Tue May 03, 2016 9:15 pm

Image
Image

The shop said that they were in good shape and I was fortunate as the assembly is made of Unobtanium. Cool thing is that we own three spares. The bands and a couple of clutches were toast but over all, it's rebuildable.

The water pump and timing chain cover came into play so that I could show and tell the Club how an ignored coolant leak can cook a transmission ... even during a Pennsylvania winter.
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby CDW6212R » Tue May 03, 2016 10:28 pm

I've never liked heating the ATF with the radiator, it assumes you want ATF at least 190 degrees, and without that it'd be pushing higher than that. I'm going to try to modify an engine thermostatic adapter to open at a lower temp than 180(like 120), and skip the radiator cooler.

BTW, I have some spare AOD parts, mostly a complete 86 police AOD and a shift kit built 91 from my first LSC(has a non lockup single input shaft and blue frictions, Kolene steels etc).
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby oldschool1 » Wed May 04, 2016 3:36 am

The tranny internals are still foreign to me. I just know that I've paid for clutches and bands for about five transmissions in the last ... twenty or so years.
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby 90 MarkVII BB » Thu May 05, 2016 10:37 am

May be a silly question, coming from someone with zero knowledge on trannys.

Could the pinhole really have caused that? How so? loss of pressure or fluid or something?

Could you have band-aided it with rtv?

Just curious.
"Ivory" - 1990 Mark VII Bill Blass Edition
3G Alternator, Arnott Air springs front/rear, hardwired dashcam, Tigerpaw whitewalls, all 4 brake lines new NiCopp, all else factory.
In the works - Backup cam, Addco#415.
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby Falkon » Thu May 05, 2016 5:11 pm

Sort of wondering the same thing, how a leak at the front of the engine ruined a trans. OR, did it get low, and overheat?
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby oldschool1 » Fri May 06, 2016 5:35 am

Our automatic transmission fluid is actually cooled by our engine's radiator.

Hot or no coolant will let the tranny fluid run hotter than design.

Running the tranny fluid hotter than design greatly lowers the life of the bands and clutches.

Worn or burnt clutches and bands lowers the ability to provide friction.

Lowered friction equals ... no go :)

Again, I'm more of a Historian than a drivetrain specialist so I'm sure that someone <cough don cough> could explain it better than me.
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby K MANIAC » Fri May 06, 2016 10:12 am

This adventure should point out to everyone the importance of correcting coolant leaks sooner than later.

Having said that, I should point out that a timing cover gasket failure, especially where the gasket seals a coolant channel, is more common than one might think.

About six months after acquiring my LSC, I experienced a sudden major coolant leak on the front of the engine, passenger side. After thorough examination, I discovered the leak was coming from the timing cover gasket. So I proceeded to disassemble the front of the engine to change the gasket. Once I exposed the timing chain, I noticed a little slop in the chain, which is expected with 140,000 miles on the clock. So I decided to change the timing chain set while I was at it. And I decided to install a new water pump while everything was apart, too, and new rubber hoses.

In the meantime, my Blass had been parked since the water pump had developed a major leak at the impeller seal. After having gone through the process with the LSC, I decided to do it all again with the Blass. Not wanting to do the procedure twice on one car, I took the Blass all the way down to the timing chain, as well. That timing chain was even sloppier, given 170,000 plus miles. So the Blass got a timing chain set, too. And while I was there, the Blass got a new thermostat (195), as well as a new idler pulley and air pump, since the bearings in both were bad. It also got a new radiator (all brass, three row core) and all new rubber hoses. I don't have to worry about the Blass overheating.

After completing this work on both Mark VII's, I did a visual inspection of my Continental. I discovered signs of coolant weeping from the timing cover gasket. I plan to do it all again on the Continental this summer.

My advice to all is this: If you have to replace the water pump, go all the way in to the timing chain, and replace the thermostat, rubber hoses, and any other rotating accessory in questionable condition at the same time.

One more thing regarding timing chain sets. Once completed, I discovered that the new timing chain set "woke up" the engines in both Mark VII's. The increase in power and performance was noticeable in both cars.
"This car may be old, but it will still climb Kirker Pass at 110!"- quote of the original owner of my green 1964 Chrysler 300-K

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1986 Continental
1989 Mark VII Bill Blass (Oxford White)
1989 Mark VII LSC (Pewter Metallic)
1989 Mark VII LSC (Sandstone Metallic)
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby oldschool1 » Sat May 07, 2016 7:35 pm

Hear hear!
I started with just the tranny issue and once we found the cause to be coolant related, I took the opportunity to correct four things at once.
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1LNCM93E8LY696041 LINCOLN MARK VII LSC SE

Postby oldschool1 » Sun May 22, 2016 10:27 pm

1LNCM93E8LY696041 LINCOLN MARK VII LSC SE

New Stuff!

ImageImage

Radiator.
Water pump.
Timing chain cover.
Timing chain.
Transmission internals (details when I see the bill).
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby 2manymarks » Mon May 23, 2016 7:13 pm

JOHN!

You are having way too much fun ! 8-)
As of June2016,[code][/code] 10Mark[*] VII's, 3licensed for the road:
1989 Midnight/Current Red c/c (9G) mostly stock99k.
1989 Current Red c/c (9G) 124k, mostly stock, needs airsuspension & bodywork.
1989 Light Titanium c/c (11) BillBlass-stock. miles unk
1989 Medium Sandalwood (62) Mass air+ 111k FOR SALE $900.
1986 BB(8T)stock125k(wife'sDD)
1987 BB (4L)stock(miles unk)under repair.
1984 TurboDiesel Base model,Platinum(1Q),131k+ FOR SALE $1000.
Parts cars: 88LSC,89BB, 90LSC-TLZ5spd(complete conversion w/extras 4SALE)
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby oldschool1 » Thu Jul 07, 2016 10:18 pm

1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

With 2016 Carlisle and a couple of holidays out of the way, I can update this thread.

The transmission section of this repair includes:
Transmission Rebuild
- DK7600B Kit With Seals
- 2640HS Conv. V8
- 76001 Pump Bushing
- 76409C FR. Pump Washer
- BW76320 Band AOD
- 76422 Filter
- 76528B Piston 2GR. Rev Servo
- 76885 Piston Cover
- 26713 Grommet TV
- K001 Throttle Valve Bushing
- U76876A Reverse Drum With Sprag (Bearing Type)
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Re: 1LNCM93E8LY696041 OLDSCL3 TRANSMISSION

Postby GRANADOJL » Thu May 11, 2017 5:20 pm

Makes me appreciate how much I spent on a trans from a junkyard and a built coming out to $450 with my Pops and I building the trans
1990 Lincoln Mark VII LSC SE 5.0l
1957 Ford F100 347 Stroker
2006 Ford Explorer 4.6l
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