Off road buggy build - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ General Discussion Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 01-14-2014, 08:55 PM
Thread Starter
Join Date: Feb 2013
Posts: 4
Off road buggy build

Alright I'm looking for suggestions on my fully custom build here tell me what I'm doing wrong and let me know what type of better ideas y'all got. I was thinking of using a 2.5 I4 yj motor mated with a t15 tranny with a d18
tcase if I can find an adapter for that setup next I was thinking d30 axles with 4.10 gearing and a yj suspensions stock and a soa conversion I want the axles to stick out beyond the body enought so the tires do not come into contact with the body I was thinking of running 35's and I want around 18-24" of ground clearance so it's not too unstable. Yj steering and brakes and any type of wiring and engine control computer stuff (yeah I know I got some reseArch to do...) now I'm not sure what type of frame to use I don't know if their is any vehicle frame I can use or if I have to go all custom I was thinking of having a short length maybe 72" I'm still working out details and looking for parts but I figured I would pitch it to you guys see what you think....

Bertkeeley is offline   Quote
Old 01-14-2014, 09:02 PM   #2
harleydragon's Avatar
Join Date: Jul 2012
Location: south georgia
Posts: 3,939
buy you a yj with a junk body and snatch it off

harleydragon is offline   Quote
Old 01-14-2014, 10:16 PM   #3
daddyjeep's Avatar
Join Date: Apr 2005
Location: Smethport, PA
Posts: 3,995
D30 is only a front axle to my knowledge. YJs came with a d35 in the rear which is a questionable axle even with a lightweight buggy. The ford 8.8 is a common swap and should be good for what you are planning. Sounds like a fun build.
87 YJ, 5.7/TH350/NP241, Custom 4 link/ Radius Arms, ADS Nitrogen Shocks, 35" Cooper STT
DaddyJeep build Thread:
daddyjeep is offline   Quote
Sponsored Links
Old 01-14-2014, 10:18 PM   #4
daddyjeep's Avatar
Join Date: Apr 2005
Location: Smethport, PA
Posts: 3,995
Why the t18 case? The np231 in most YJs is a good case.
87 YJ, 5.7/TH350/NP241, Custom 4 link/ Radius Arms, ADS Nitrogen Shocks, 35" Cooper STT
DaddyJeep build Thread:
daddyjeep is offline   Quote
Old 01-15-2014, 10:50 AM   #5
OregonPlinker's Avatar
Join Date: Dec 2012
Location: Creswell, OR.
Posts: 878
I would go full width on the axles my self. Light weight like that you would be fine with a full width 8.8 and a d44 and 35s probably up to 37s really or D44s front and rear... The 8.8 is stronger though..

And all that work to run a 4 cylinder? Nah, at least set it up with a 4.0 or 4.3. SBC would be my choice unless I had something sitting in the shop or was getting a smoking deal on a whole power train...
91 Laredo, 4.0ho, TF999, Magnaflow exhaust, Yukon rear axles, Spartan Lockers, Posi locker, 3.5 inch springs, 1"MML, 1"BL, 1"shackles, trimmed fenders, raised flares, 35x13.50s.
OregonPlinker is offline   Quote
Old 01-21-2014, 06:17 PM   #6
0III0forlife's Avatar
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 4,757
Ok, I will give it a shot...Good ideas but wrong calculations.

You want stock YJ axles with 4.10 gears and 35's? that 4cyl is going to have a tough time trying to turn 35's with only 4.10 gears. I would think more like 5.13's would be better, but you cant get anything deeper than 4.88's in the stock housings.

You want 18-24 inches of ground clearance on 35" tires. The center of a 35" tire is 17.5" and minus the inches to the bottom of the differential, and you are down to about 12" of ground clearance. (actually 11.75" on my YJ with 35's) you have to install much larger tires to get 18-24" of ground clearance...That little 2.5L is hating you by now!

You want spring over axle suspension, but full width axles, so the tires stick out past the body, so you aren't running stock axles anymore. cause they don't make a D30 in full width. So, go to a D70 or D80 so you can install some 5.13 gears. that way your 4cyl motor will make them go around.

And you want all of this in a 72", I'm assuming, wheel base? Short and tall? lol. Nice try, but you forgot to factor in the fact that if you have a 72" wheel base, the drivetrain isn't even possible. The back of the t-case will be beyond the front of the back rear end. I would love to see how you are going to make that driveshaft work.

Its nice to dream about a cool buggy, but in all reality, just cause it looks good in your isn't feasible to put on paper much less make it happen in real life. Keep dreamin' kid, someday you might come up with a winner.

'87 YJ, 4.2L built and bored, 8" of lift, 8.8 rear, AX15/NP 231J, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote

« Shocks | help »
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 09:16 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC