999 tranny rebuild.... - JeepForum.com
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post #1 of 16 Old 03-09-2013, 03:55 AM Thread Starter
stuckparatroope
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999 tranny rebuild....

This is my first ever forum post so go easy on me! 90 wrangler 4.2, picked it up for cheap $2,300, only 100,000 miles!, wife can't drive a manual so got the auto. Kept breaking flexplates (2 in a week!) Thought it was TC, bought new one, went to replace it and found stator support shaft chewed up so I have decided to rebuild myself. First time rebuilding one so any input/ advice would be great! Have all the tools, getting astg manual tomorrow, probably going to get the super kit from wit trans and get a transgo kit...anyone have the transgo kit installed? I will be taking lots of pics and posting on this rebuild step by step, as I couldn't find any full writeups 999 specific. Thanks!


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post #2 of 16 Old 03-09-2013, 04:41 PM
jay-h
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I'm assuming that you've rebuilt automatics before. There are a number of articles with general torqueflite hints over at allpar.com

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post #3 of 16 Old 03-09-2013, 05:02 PM
Plato2k5
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I built my 727 with the transgo kit. I did the stage 3 (or whatever the highest stage is) and it its a fast snappy shift. Probably not something you will want for a DD.

Get yourself a nice set of snap ring pliers
use vasoline for all the pistons/seals when you rebuild

BENCH TEST BEFORE PUTTING THE VALVE BODY BACK ON!!!!! This will tell you if you screwed something up before putting in the vehicle to find out all you have is reverse because a seal was installed wrong...... yeah I learned the hard way on that lol.

With bench testing you use compressed air and it will test each clutch pack and servos.

I would buy a deeper aluminum pan and install a trans temp gauge and aux cooler. Also replace the torque converter.
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post #4 of 16 Old 03-09-2013, 05:19 PM
Chrisnvegas
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Quote:
Originally Posted by Plato2k5 View Post
I built my 727 with the transgo kit. I did the stage 3 (or whatever the highest stage is) and it its a fast snappy shift. Probably not something you will want for a DD.

Get yourself a nice set of snap ring pliers
use vasoline for all the pistons/seals when you rebuild

BENCH TEST BEFORE PUTTING THE VALVE BODY BACK ON!!!!! This will tell you if you screwed something up before putting in the vehicle to find out all you have is reverse because a seal was installed wrong...... yeah I learned the hard way on that lol.

With bench testing you use compressed air and it will test each clutch pack and servos.

I would buy a deeper aluminum pan and install a trans temp gauge and aux cooler. Also replace the torque converter.
Sorry about jumping in here, but I think it's relevant.

Can an automatic be overcooled? Mt trans (T999) works great. I change the fluid every fall and it's not a DD so it probably has 2000 to 3000 miles between changes. BUT, I run sand dunes much of that time. Big sand dunes. I figure it is a big strain on the trans.
I have a Behr trans cooler. It's 2x4x20 inches. It's a heavy duty stacked plate cooler. Is it too big? I haven't installed it yet.

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post #5 of 16 Old 03-09-2013, 07:36 PM Thread Starter
stuckparatroope
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Quote:
Originally Posted by Plato2k5 View Post
I built my 727 with the transgo kit. I did the stage 3 (or whatever the highest stage is) and it its a fast snappy shift. Probably not something you will want for a DD.

Get yourself a nice set of snap ring pliers
use vasoline for all the pistons/seals when you rebuild

BENCH TEST BEFORE PUTTING THE VALVE BODY BACK ON!!!!! This will tell you if you screwed something up before putting in the vehicle to find out all you have is reverse because a seal was installed wrong...... yeah I learned the hard way on that lol.

With bench testing you use compressed air and it will test each clutch pack and servos.

I would buy a deeper aluminum pan and install a trans temp gauge and aux cooler. Also replace the torque converter.
I already have a new tc and flexplate ready to go, should be tackling this within the next few days, just waiting for the kit to arrive. I also plan to relocate the vent as I have heard the flood out fairly easy. This is the first automatic vehicle I have ever owned and the first trans ever rebuilt but I'm fairly mechanically inclined jeeper so I'm gonna give it a swing! Thinking about getting the stage 2 transgo.
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post #6 of 16 Old 03-09-2013, 07:58 PM
jay-h
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Just remember, in an auto, cleanliness is everything--far more critical than engines or manual transmissions. No dust, no paper towels, lint free cloth only.

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post #7 of 16 Old 03-09-2013, 08:21 PM Thread Starter
stuckparatroope
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So I have heard...my wife doesn't know it yet but I plan to commandeer our kitchen for it lol. Probably a dumb question but what is the vasoline for?? Holding parts in or for other reasons?
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post #8 of 16 Old 03-09-2013, 08:25 PM
Yankee-Juliet
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Subscribed. Looking forward to this. Please be thorough and post lots of pics.

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post #9 of 16 Old 03-09-2013, 09:02 PM Thread Starter
stuckparatroope
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I have a feeling this is going to get interesting

"If a trail breaks your jeep....this is a formal insult, grounds for retaliation from the jeep gods in the form of a motor swap, bigger lift kit, bigger tires, and a grudge run at it....break out your cameras boys...and, WATCH THIS!!!!" - last words before the demise of my favorite jeep!
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post #10 of 16 Old 03-11-2013, 03:10 AM Thread Starter
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Sooo...beginning to wonder if a rebuild is even necessary.. I bought the jeep with a broken flex plate, the guy thought it was a rod knock, I replaced the flex plate and put back together, drove around 20 miles and broke another flexplate exactly the same way as the first one! I replaced the dowel pins and the alignment was perfect so I thought it may be a bad torque converter so I bought a new one and when I went to reinstall it, I found that when it is fully seated into the trans, it will wobble, and the stator support shaft had about an 1/8" of the splines nearest the bellhousing worn down, and the tc will wobble left right up down, by hand....but the input shaft doesn't have hardly any play....I'm almost at a loss as to whether I need to rebuild or if the problem is something else. Few metal shavings in bellhoising but I think they were from the inspection plate, because there was none in the trans fluid... any suggestions?!

"If a trail breaks your jeep....this is a formal insult, grounds for retaliation from the jeep gods in the form of a motor swap, bigger lift kit, bigger tires, and a grudge run at it....break out your cameras boys...and, WATCH THIS!!!!" - last words before the demise of my favorite jeep!
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post #11 of 16 Old 03-11-2013, 12:34 PM Thread Starter
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Anyone?

"If a trail breaks your jeep....this is a formal insult, grounds for retaliation from the jeep gods in the form of a motor swap, bigger lift kit, bigger tires, and a grudge run at it....break out your cameras boys...and, WATCH THIS!!!!" - last words before the demise of my favorite jeep!
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post #12 of 16 Old 03-11-2013, 08:10 PM Thread Starter
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Bump

"If a trail breaks your jeep....this is a formal insult, grounds for retaliation from the jeep gods in the form of a motor swap, bigger lift kit, bigger tires, and a grudge run at it....break out your cameras boys...and, WATCH THIS!!!!" - last words before the demise of my favorite jeep!
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post #13 of 16 Old 03-11-2013, 08:39 PM
jay-h
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I'd ask around on some Mopar boards. I'm not sure what would cause a flex plate to simply break but I'm guessing you need to talk to an experienced auto trans guy.

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post #14 of 16 Old 03-12-2013, 03:26 AM Thread Starter
stuckparatroope
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Checked on mopar boards earlier and everyone that had this issue never said if they got it resolved or not...

"If a trail breaks your jeep....this is a formal insult, grounds for retaliation from the jeep gods in the form of a motor swap, bigger lift kit, bigger tires, and a grudge run at it....break out your cameras boys...and, WATCH THIS!!!!" - last words before the demise of my favorite jeep!
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post #15 of 16 Old 05-18-2013, 07:14 AM
rksnow1
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wondering how you ever made out with this? Did you have to rebuild the trans or find the problem?
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