TF999 Rebuild - JeepForum.com
 
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post #1 of 4 Old 03-21-2012, 04:08 PM Thread Starter
VACJ5
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1991 YJ Wrangler 
 
Join Date: Jul 2008
Location: Chesapeake/Virginia Beach
Posts: 829
TF999 Rebuild

I have a spare 4.0 and TF999 lying around. I am building them both to swap out my wore out old motor and trans.

These torque flights are really easy to work with. No real specialty tools needed, a pick set and some good snap ring pliers. I took the pan off and pretty stoked by what I found. Turns out this trans has an electronic solenoid for a lock up converter. Unfortunately my 91 doesn't have the electrical connection for a lock up converter off the pcm. BUT, this is a simple 1 wire solenoid that is internally grounded. So I am going to hook a switch on the dash with a 12V+ and wallah! have a "4th gear" when I am on the highway.

This is the part I was interested about... Will some of you guys who have rebuilt a transmission take a look at these bands and clutch plates. They look like they are in good condition to me. I actually believe this thing might have been recently rebuilt due to the fact that all of the gaskets looked new and oil seals. I figure while I'm in there I will still replace everything, but I just wanted some opinions on the condition of these clutches.

I am going to start modifying the valve body for the Transgo shift kit.

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79 CJ5 Silver Anniversary Edition... revived & sold *sniff
91 YJ 4.0 L, with some stuff bolted to it... 3/4 Ton YJ
91 2 door Cherocar... in progress

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post #2 of 4 Old 04-01-2012, 10:47 AM
dusterdude
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1996 ZJ 
 
Join Date: Jan 2012
Location: hopewell
Posts: 2,048
Im no expert but they look good to me
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post #3 of 4 Old 04-17-2012, 03:30 AM
budello
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1987 YJ Wrangler 
 
Join Date: Mar 2010
Location: Roma
Posts: 18
I'm going to rebuilt my tf999 too. I have a spare tf 999 that I just opened for take a look inside and band and clutch are worst than yours. They have black stripe and look worn. Yours seem near new.
Are you planning modify the vent hose moving it from the pump to the top of the case?
Let us know about the rebuild!
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post #4 of 4 Old 04-17-2012, 11:16 AM Thread Starter
VACJ5
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1991 YJ Wrangler 
 
Join Date: Jul 2008
Location: Chesapeake/Virginia Beach
Posts: 829
Yep, I was worried about welding up the vent hole and warping the pump, so I saw where a fellow YJ owner on here drilled and tapped it. Plugged it with a flush hex head screw and RTV'd the heck out of it.

The transmission itself is really easy to work on. Only tools I really used were a pair of snap ring pliers, a small pick set and standard sockets. Just pay attention to the order you take things apart... sit them off to the side in the same order.

79 CJ5 Silver Anniversary Edition... revived & sold *sniff
91 YJ 4.0 L, with some stuff bolted to it... 3/4 Ton YJ
91 2 door Cherocar... in progress

BeachMetalWorks Custom CNC cut Jeep parts & more
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