CJ vs YJ TF999 - JeepForum.com

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post #1 of 24 Old 01-11-2010, 09:13 AM Thread Starter
VACJ5
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CJ vs YJ TF999

I am still trying to get a replacement TF999 for my YJ... I found a great deal on a rebuilt 999 from a CJ... are there any differences?


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post #2 of 24 Old 01-11-2010, 12:19 PM Thread Starter
VACJ5
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Or how about... are the bolt patterns for transmission bellhousing on the 4.2 and 4.0 the same?

79 CJ5 Silver Anniversary Edition... revived & sold *sniff
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91 2 door Cherocar... in progress

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post #3 of 24 Old 01-11-2010, 01:23 PM
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Quote:
Originally Posted by VACJ5 View Post
Or how about... are the bolt patterns for transmission bellhousing on the 4.2 and 4.0 the same?
Same tranny, no differences.
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post #4 of 24 Old 01-11-2010, 02:31 PM
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Quote:
Originally Posted by Why J? View Post
Same tranny, no differences.
Lock up torque converter?

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post #5 of 24 Old 01-11-2010, 02:40 PM
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Quote:
Originally Posted by kingcandy View Post
Lock up torque converter?
no- not in Cj's and older Yj's until 92.

May need to swap bell housings. I don't remember if the Cj had a hole for the CPS or not.

Everything you need to know about the 999.

http://www.4wdandsportutility.com/te...ild/index.html
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post #6 of 24 Old 01-11-2010, 02:54 PM
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Quote:
Originally Posted by Why J? View Post
no- not in Cj's and older Yj's until 92.

May need to swap bell housings. I don't remember if the Cj had a hole for the CPS or not.
Some CJs did have a lock up TC. Mine does (84). I just rebuilt the tranny so I am sure. It is a mechanical lock up though, not electrical. No solenoid.

CJs did not have a hole for a CPS.
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post #7 of 24 Old 01-11-2010, 04:41 PM Thread Starter
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I don't currently have a lock up converter in my 91... So the only difference is that there is no hole for the cps? Is there anyway around that other than swapping bellhousings? I wanted to buy this one to try and avoid completely rebuilding one... but if I have to swap everything over to the other bellhousing, kinda eliminates the point.

79 CJ5 Silver Anniversary Edition... revived & sold *sniff
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91 2 door Cherocar... in progress

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post #8 of 24 Old 01-11-2010, 07:18 PM Thread Starter
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Okay, so I have heard about this Hensco kit... But I can't find it for sale online anywhere, if I could it is supposedly 370 dollars, and it relocates my cps. I have seen on other sites where people had a bracket and drilled a hole in the bellhousing... called it good.

Can anyone help me locate a hensco kit or tell me about drilling the bellhousing?

79 CJ5 Silver Anniversary Edition... revived & sold *sniff
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91 2 door Cherocar... in progress

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post #9 of 24 Old 01-11-2010, 08:03 PM
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Rebuilding the tf999 is just about as simple as it gets.

Last edited by Why J?; 01-12-2010 at 07:34 AM.
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post #10 of 24 Old 01-11-2010, 08:32 PM
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It's Hesco
Hesco Inc. - High Performance Engine Service

This is the part # you supposedly need HES9199ED but it's not listed on their site. Also it appears to be for 91-03 4.0L. You should give them a call in the morning.

Advance Adapters also has a kit. 91-96 4.0L
716012-C | Engine & Transmission Conversion Adapters - Advance Adapters

I hope that helps you.
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post #11 of 24 Old 01-12-2010, 04:37 AM
ctm
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on the tf999 there is no 'swap' bellhousings...it's part of the tranny, not bolted on like a manual tranny.
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post #12 of 24 Old 01-12-2010, 05:06 AM
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Honestly, it doesn't take much more mechanical knowlege to rebuild one of those trannies than it takes to get one out of the jeep and replace it correctly. Much cheaper, and you have the assurance of everything that needs replaced, was replaced. OR a trans thats been removed is much cheaper to have rebuilt than one they have to take out, call around. All of this is cheaper than buying another one and rigging up a cps.

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post #13 of 24 Old 01-12-2010, 05:23 AM Thread Starter
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Well hell... I have a spare TF999 laying in the shop... looks like I will be investing in a rebuild kit...

here goes nothing!

79 CJ5 Silver Anniversary Edition... revived & sold *sniff
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91 2 door Cherocar... in progress

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post #14 of 24 Old 01-12-2010, 07:32 AM
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just went through this a few months ago, u need a tranny from a 91-93 they came with cps sensor in bellhousing early yj (non fuel injected) and cj obviously didnt have this... they are hard to find to say the least..

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post #15 of 24 Old 01-12-2010, 07:34 AM
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Quote:
Originally Posted by ctm View Post
on the tf999 there is no 'swap' bellhousings...it's part of the tranny, not bolted on like a manual tranny.
That's right.............. sorry it's been some time since i worked on one of these.
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