Chevy 350 W/ Chevy Tranny - Will It Work??? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Chevy 350 W/ Chevy Tranny - Will It Work???

FS: Wrangler RGB Multicolor Fog Light LEDs: Awesome EffectFS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits

Reply
Unread 09-15-2004, 09:54 PM   #1
I8JPB4U
Registered User
 
Join Date: Sep 2004
Posts: 2
Chevy 350 W/ Chevy Tranny - Will It Work???

Looking for help anywhere !!
I have an 89 Wrangler with a CJ body, has a 350 chevy motor in it.
I have been told that you can use any chevy automatic truck tranny and its transfer case it would fit with this motor.
Has anyone attempted this and was it succesful? WHat was the donor car and did you run into any problems?
My original thought was to replace my manual with a TH400 automatic but ... I am trying to avoid spending several hundred dollars on adapters and so forth.
Any thoughts/ideas/resolutions greatly appreciated!
Mike

I8JPB4U is offline   Reply With Quote
Unread 09-15-2004, 10:30 PM   #2
NYWheeler
Registered User
2012 JK Wrangler 
 
Join Date: Mar 2002
Location: Long Island
Posts: 171
You can use a 700r4 and np231c from an s-10. The 700r4 will give you the overdrive and the np231c will give you a bigger chain.
NYWheeler is offline   Reply With Quote
Unread 09-16-2004, 05:57 AM   #3
I8JPB4U
Registered User
 
Join Date: Sep 2004
Posts: 2
Quote:
Originally Posted by NYWheeler
You can use a 700r4 and np231c from an s-10. The 700r4 will give you the overdrive and the np231c will give you a bigger chain.
With that configuration - Does that mean I will not need an adpater plates?
And what year S-10 , will any work?
Thanks
Mike
I8JPB4U is offline   Reply With Quote
Unread 09-16-2004, 06:48 AM   #4
BESRK
GROUND POUNDER
 
BESRK's Avatar
1980 CJ5 
 
Join Date: Nov 2002
Location: Newport News, VA
Posts: 12,268
Not sure about the S10 but your average GM 4wd has a passenger side drop on the transfer case which would not be compatible with your driver's side pumpkin on the front axle. You'd need to swap the front axle out for something with the passenger side drop. That could end up costing you more than an adapter to mate a Chevy tranny to your current NP231... you could swap the whole drivetrain from a 70 something Chevy truck into your Wrangler with relative ease. The front truck axle is a bolt in spring over. The rear axle would need the spring perches moved a bit. The tranny and transfer case can use the stock Wrangler tranny crossmember with a little tweaking. You would wind up with a V8 Wrangler, full-sized axles running spring over.. I just helped my buddy do this very swap on his YJ and it was pretty easy..
__________________
'80 CJ5 w/AMC360, T176, D44 w/Detroit 4.56, RE 4" YJ lift and 35s..

Ground Pounder Fab


Lower 2

Guardrail

Down Schoolbus

Slickrock Tellico

Save

Crozet

More Crozet
BESRK is offline   Reply With Quote
Unread 09-16-2004, 07:30 PM   #5
NYWheeler
Registered User
2012 JK Wrangler 
 
Join Date: Mar 2002
Location: Long Island
Posts: 171
If you use a 700r4 and np231c from an s-10 with the 4.3l motor than the front drive shaft will be on the correct side for the stock axle. I believe you can use 87-90. I'm not 100% sure on the years. You will not need any adapters if you go that route. Plus the np231 from the s-10 has a bigger chain than the jeep np231 so it will handle the power a little better.
NYWheeler is offline   Reply With Quote
Unread 09-16-2004, 10:53 PM   #6
Jeepfreak81
Registered User
1994 YJ Wrangler 
 
Join Date: Apr 2002
Location: Lennon, Mi
Posts: 2,041
that is all accurate with the 231C, drivers drop, heavier chain and is mounted behind 700r4's in all S-trucks from the mid to late 80's (87 IIRC) until the 2000 model year or so... the front half of the 231 case is different then the jeep so there are no adapters. The internals for the most part are the same, except the heavier chain and sprockets to accomodate. HOWEVER the later model s-trucks electronically shifted the t-case (pushbutton 4wd) I have a 1991 NP231C behind my 355 (was a manual shift model) and have had no ill effects so far. I just put the front shaft back on tonight and dropped it into 4 low to the floor to test the driveshaft fix done that a few times

the drivers drop will severly limit what you can use behind that 350 for a tranny and t-case without adapters.
__________________
94 V8 YJ, SOA, H1's, 37's, HP D44, D60, 4.88's, winch and some other goodies
1946 CJ2A, 225 V6, T98 D18, Warn OD, D30/D44. Dual winches mild lift & 34's
1966 M416 1/4 ton Military Trailer Expo Trailer
Full Page Club member #004
Green Jeep Club Member #005
Jeepfreak81 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.