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Unread 06-23-2009, 06:30 PM   #1
Bezzell
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Michigan
Posts: 51
TF999 Auto Trans Leak

Well, my 89' TF999 is leaking like crazy. Seems to be leaking out the weep vent.

I've never done any type of trans work, but would like to attempt this myself cause money is tight at the moment. I've found alot of the same problems and solutions on standard transmissions, but nothing on the automatic.

Some type of walk through or schematic of the trans is what I need. Also any suggestions.

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Unread 06-23-2009, 06:40 PM   #2
Burnerman
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1989 YJ Wrangler 
 
Join Date: Oct 2006
Location: Vernon, NJ
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What weep vent? the vent is behind the torque converter. Is the fluid leaking from the bellhousing? If so it may be the front seal. If you have to pull the trans do this mod.. It's on my list...http://www.pirate4x4.com/forum/showthread.php?t=586054
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Unread 06-23-2009, 06:41 PM   #3
skip-yj
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1988 YJ Wrangler 
 
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Location: cinnaminson nj
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well im shure im no help. buutt i did have that trans and did have a major leak. it ended up being a stress crack in the torque converter. and it was leaking out of the bottom where the dust cover is. if its not that then check the fluid when its hot. srri man. haha i know htat didnt help to much
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Unread 06-23-2009, 06:45 PM   #4
Burnerman
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1989 YJ Wrangler 
 
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Mine was blowing fluid out of the selector shaft seal. cost me $40 in fluid, filter and a $4 seal.
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Unread 06-23-2009, 07:05 PM   #5
speepdaedeesi
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1997 TJ Wrangler 
 
Join Date: Mar 2009
Location: fort drum ny
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+1 on the selector shaft seal...

i had an old 89 with a tf999 and i thought it was leaking from the pan gasket when i bought it. installed a pan gasket and trans filter and it was still leaking. didnt realize for a few days that it was the selector shaft seal... i think it was even less than 4 bucks on rockauto

make sure you pinpoint that leak before you start dropping cash
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89 yj stock- sold
92 yj stock- sold
97 tj 2"bb,31" tires- sold
95 yj soa,350 v8,sm465,44" tires,d60,14bolt- sold
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current ride-97 TJ- 86k miles, 4cyl auto, black casinos, 31" BFG A/T
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Unread 06-26-2009, 01:47 PM   #6
Bezzell
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Michigan
Posts: 51
Do I need to pull the entire trans to get to the selector seal?
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Unread 06-27-2009, 11:15 PM   #7
Bezzell
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Michigan
Posts: 51
Well, i replaced the selector shaft seal, filter, pan gasket and ZERO leakage!! Put about 25 miles on it repeatedly checking the fluid level and for any leaks. Can't believe it. I was prepared for a nightmare. Thx alot fellas for the advice.
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Unread 06-28-2009, 02:40 AM   #8
speepdaedeesi
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1997 TJ Wrangler 
 
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well i was gonna say use a short puller to get to the selector seal without dropping the tranny but looks like you already figured it out lol.

howd you get it?
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89 yj stock- sold
92 yj stock- sold
97 tj 2"bb,31" tires- sold
95 yj soa,350 v8,sm465,44" tires,d60,14bolt- sold
95 yj soa,350v8,700r4,35" tires,d30, 8.8, fuel cell- sold
current ride-97 TJ- 86k miles, 4cyl auto, black casinos, 31" BFG A/T
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Unread 06-28-2009, 12:11 PM   #9
Bezzell
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1989 YJ Wrangler 
 
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Location: Michigan
Posts: 51
I ended up lowering the trans a tad and the valve body.
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Unread 07-04-2009, 06:50 PM   #10
NMjeepguy
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2014 JK Wrangler 
 
Join Date: Jan 2009
Location: Port Orchard, WA
Posts: 29
Mine was leaking from the front pump. The input shaft seal was OK, but the leak was coming from behind the pump.

I looked all over town and was unable to locate a new gasket and O-ring without buying a gasket kit. While searching, I stopped at a local trans shop, where I was advised to remove the pump (instructions below) and try my best to salvage the old gasket. I removed most of the gasket, except the part with the oil passages to the pump, cleaned everything really well with brake cleaner, then applied a thin coat of black RTV sealer to everwhere the gasket covered, and a light coat of RTV to the outside of the O-ring which surrounds the outside of the pump. I let is sit for a few minutes in the air, then put it all together.

While I had everything apart, I took the opportunity to replace the filter and pan gasket.

My brief visit with the transmission shop guy was quite educational:

I learned that the rear flange of the torque converter (the part that goes into the pump) is prone to cracking on the edges of the slots which drive the pump. You need to make sure your converter isn't craked there, or you will be guaranteed a leak when you reassemble.

Also, you want to be sure to use a scotch-brite pad to buff up the flange on the torque converter to ensure the new seal doesn't leak.

Inside the bell housing, on the bottom corner, there is a plug. To avoid future leaks, remove it and coat with RTV, then reinstall.

All in all, the removal and replacement of the transmission is a bit of a PITA. The parts are heavy, and high up.

Use a transmission jack. It's worth the money. I didn't have one, and I live far away from a Harbor Freight, plus I wasn't willing to pay my local parts store price. I ended up tack welding a 18 inch piece of flat steel to the top of my floor jack, then another one across the top of the first, making a "T" shape. It worked fine, but not everyone has a good welder, nor are they willing to compromise a good jack. Once I was done, I took one end of the "T" and stuck it under my differential and attampted to lift my Jeep. The pieces broke right off, as planned.

***pump removal instructions***

Remove torque converter.

Stand transmission on end in 5 gallon bucket, so that bell housing is upward. This is necessary to keep internal parts in position when pump is removed. Don't skip this part, says the trans guy!

Remove bolts around the pump. 2 holes on the front of the pump are threaded for 3/8 - 16 bolts.

Screw in 3/8 - 16 bolts into the holes on the front of the pump. These will press the pump out of the housing.

Pull pump out.



I hope this helps!!

Happy Jeeping.
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