Jeep Wrangler Forum

Jeep Wrangler Forum (
-   YJ Tech Forum (
-   -   V8 and auto trans swap (

RustedYJ 09-07-2011 11:23 AM

V8 and auto trans swap
I'm thinking about my build (89 YJ). I'm planning a V8 and automatic transmission but trying to decide what mill to go with (Dodge 360 and Chevy 350 are my top picks) and what transmission to make the swap as simple as possible. I'm planning to keep the NP231 TC and would like to have something that mates to that fairly easily (Novak or Advance for adapters, etc). I'd prefer to get all the parts from one donor vehicle. What do you all think?

IndyJeepMan 09-07-2011 12:43 PM

The Chevy LS series are great motors, and with the 4.8l or 5.3l you can have the 4L60E or 4L80E. The 4L80E is a Turbo 400 with overdrive, the better choice but more expensive.

Lastly, for all swap knowledge, parts, and tech. Go to,

Copperhead 09-07-2011 12:48 PM

I'm going to install a Dodge 318 and a 727 4x4 automatic into my '89 YJ. It will mate up to my NP231 without adapters. I pulled the trans out of a '85 Dodge Ramcharger.

1995yj318 09-07-2011 02:41 PM

I would go 5.2 or 5.9 magnum. But then again I am working on it now.

RustedYJ 09-07-2011 03:00 PM

I should have been a little clearer. 5.9 Magnum is actually what I'm thinking for the Dodge motor. Is the transmission controller part of the engine controller for those motors?

1995yj318 09-07-2011 03:39 PM

Yup the PCM controls the engine and trans. Plus wiring the whole shebang is fairly straight forward.

All times are GMT -5. The time now is 10:04 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.