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automatic transmission


 
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oldwindsurfer
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Joined: 29 Nov 2007

PostPosted: Thu Nov 29, 2007 1:30 pm    Post subject: automatic transmission Reply with quote

Sorry to ask this question cause it probably been asked a million times before.I have a 1990 Wrangler standard transmission in line six with a weber carb conversion and I want to convert it to an automatic.There is a 1994 yj in the junk yard with an automatic in it.I know I'll have to change the pedal assy but what else is needed.Thanks Newbie so be gentle on me.
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Tardis
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Joined: 07 Aug 2004
Location: Ohio

PostPosted: Sat Dec 01, 2007 12:22 am    Post subject: Reply with quote

Here are the specs:
The trans you found is a A904TF(30RH) Standard Duty 3spd with lock-up torque converter.
It's part of the TF family aka 904/998/999/TF727.

Here's what you'll need:
*Trans/Torque Converter
*Inspection cover(s)
*Flywheel
*Starter
*Kick-Down Linkage/Cable
*Automatic Steering Column w/linkage (Or a Good Floor Shifter Set-Up)
*Auto Trans Radiator
*Tranny Lines
*Auto Trans mount
*Auto Trans Belly Pan (Or modded belly pan that fits the tranny mount)
*Drive shafts
**Neutral Safety Switch Wiring (aka Trans Wiring Harness)
***Torque Converter Lock-up kit Non-ECM/Carb Vehicles (Switch/Relay)
****Lots of Beer and Patience

**Chrysler used a 1 wire NSS on the 904 from 86-96, 2 wire NSS for 97-up.
***Locks the torque converter to a 1:1 ratio in 3rd gear for better fuel economy.
Keeps the RPM's lower for freeway driving.
Lock-up kits are avaialbe for GM 700R4/200R4/200C trannys.
I haven't seen any available for A904's yet.
An 87-90 YJ Auto ECM will make the lock-up work, that's a whole other can of worms!
****This is a must! Laugh


If this is your 1st trans swap then do some more research before continuing.
It's a big job that can be a pita if you don't know what you're doing.
Make sure the trans you get is good, or get it rebuilt before you put it in.
If you don't, you'll be kicking yourself in the a$$ later when you have to take it out to again.
If you want to save yourself a ton of work just stick with the AX-15 in and call it a day... Smile
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98' TJ, 99' XJ
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oldwindsurfer
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Joined: 29 Nov 2007

PostPosted: Mon Dec 03, 2007 12:40 pm    Post subject: auto transmission Reply with quote

You talked me out of it.The wife doesn't need to drive my Jeep anyway.
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Tardis
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Joined: 07 Aug 2004
Location: Ohio

PostPosted: Mon Dec 03, 2007 4:36 pm    Post subject: Re: auto transmission Reply with quote

oldwindsurfer wrote:
You talked me out of it.The wife doesn't need to drive my Jeep anyway.

Heh, clutches are easy enough to change. Teach her how to drive a stick Laugh
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98' TJ, 99' XJ
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