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05-31-2009, 07:51 AM
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#1
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Registered User
Join Date: May 2009
Location: pa
Posts: 20
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is it possible to drop a cummings in my 89 yj?? i wonder how much work it would be has anyone here every tried this type of swap?
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05-31-2009, 09:01 AM
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#2
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Registered User
Join Date: Mar 2009
Location: North Carolina
Posts: 376
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Possible? The frame is plenty strong, but you'd need stronger axles, stronger transmission and possibly a stronger transfer case. Better brakes wouldn't hurt either. Plus you need to rewire, modify your driveshafts and a bunch of other fabrication.
A lot of time, work and expense. Be prepared for that. Then maybe you end up with something like this:
http://www.youtube.com/watch?v=5Z-IRm4Wg0Q
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05-31-2009, 09:32 AM
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#3
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Registered User
Join Date: Jan 2009
Location: mi
Posts: 4,158
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Don't forget the weight factor in it. Do a search on here there are lots of information about this same subject.
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A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
Quote:
Originally Posted by bigsquat
im just cheap, and cheap makes you creative.
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05-31-2009, 09:37 AM
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#4
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Registered User
Join Date: May 2009
Location: pa
Posts: 20
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yeah i figured itd be very time consuming great thing is i have winters off lol an a whole farm full of tools for this but yeah so yeah id need beefed up axels tranny an tcase an probaly heavy leafs right??
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05-31-2009, 09:45 AM
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#5
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Registered User
Join Date: Apr 2007
Location: Vineland, NJ
Posts: 1,707
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Quote:
Originally Posted by mulcahy2713
yeah i figured itd be very time consuming great thing is i have winters off lol an a whole farm full of tools for this but yeah so yeah id need beefed up axels tranny an tcase an probaly heavy leafs right??
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with that much front end weight you'll need some big tires too
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05-31-2009, 10:54 AM
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#6
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Registered User
Join Date: Jan 2008
Location: petrolia
Posts: 141
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Quote:
Originally Posted by SteveJcoYJ
with that much front end weight you'll need some big tires too
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Why big tires?? and also its Cummins not Cummings
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05-31-2009, 10:56 AM
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#7
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Registered User
Join Date: Feb 2009
Location: Southern Indiana
Posts: 541
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Quote:
Originally Posted by yea_mitch
Why big tires?? and also its Cummins not Cummings
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if your doing an engine swap you gotta get bigger tires. its a man law 
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95 Rio Grande YJ. Power generously provided by 4 angry squirrels and a 20 gallon squirrel feeder. Sitting on 31x10.5 ATs with AR wheels
Yes I'm 20, Yes I like Jeeps, Yes I do not know everything
Originally Posted by GrandLaredoWJ
You should be fine with the axle setup, just as long as you don't beat on it as hard as you would looking at a Playboy magazine, the d30 and d35 should hold up.
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05-31-2009, 12:23 PM
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#8
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Registered User
Join Date: Mar 2009
Location: North Carolina
Posts: 376
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Quote:
Originally Posted by YJteen
if your doing an engine swap you gotta get bigger tires. its a man law |
True Dat! 
Plus larger tires have more load capacity to support the added weight of the engine, axles and trans, plus cargo capacity (figure 300lbs per passenger plus gear) ie. You need to define a new Gross Vehicle Weight. Something like 32" or 33" tires should be plenty though.
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05-31-2009, 01:51 PM
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#9
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Registered User
Join Date: Nov 2004
Location: Birmingham, Al.
Posts: 5,030
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The Cummins is a great motor but it is a heavy pig. There are some lighter diesels out there that are strong, the duramax has alot of aluminum although i dont know what it weighs.
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Your limited slip differential sucks.
Quote:
Originally Posted by Anticanman
Any video of the sound?
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05-31-2009, 01:55 PM
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#10
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Registered User
Join Date: Mar 2007
Location: Old Forge, PA (Scranton)
Posts: 2,507
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For a Jeep-sized vehicle, the 4BT swap is sort of becoming the "norm."
http://www.4btswaps.com/forum/index.php
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94 YJ w/ stuff. All the work/money I put into it, and the comment I get most is my $20 mod: "Hand throttle?!? That's awesome."
Quote:
Originally Posted by dmcanally
You know you drive a YJ when it is no longer getting older, but slowly becoming brand new part by part.
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05-31-2009, 02:10 PM
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#11
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Registered User
Join Date: Jan 2008
Location: petrolia
Posts: 141
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Quote:
Originally Posted by YeepieJeepie
True Dat!
Plus larger tires have more load capacity to support the added weight of the engine, axles and trans, plus cargo capacity (figure 300lbs per passenger plus gear) ie. You need to define a new Gross Vehicle Weight. Something like 32" or 33" tires should be plenty though. |
you sir need to be more informed
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05-31-2009, 03:12 PM
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#12
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Registered User
Join Date: May 2009
Location: pa
Posts: 20
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yeah whats another good smaller diesel?? i found a cummins in upstate ny for 600 what tranny an tcase would i need
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05-31-2009, 06:50 PM
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#13
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Registered User
Join Date: Mar 2009
Location: North Carolina
Posts: 376
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Quote:
Originally Posted by yea_mitch
you sir need to be more informed
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 Informed about what? Is there something in my post that you don't agree with?
When you start adding a lot more weight to your vehicle, you do need to consider the load capacity of your tires. Vehicle weight + cargo capacity = GVW. Your tires need to support your new GVW safely (as does your brakes and suspension).
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05-31-2009, 07:17 PM
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#14
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Registered User
Join Date: May 2009
Location: Guam
Posts: 11
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300lbs per person???? You must have some big women where your from!!!! lol. I'm kidding keep up the great posts guys. My girlfriend hates you all because i spend more time on here and with my jeep than i do with her!
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05-31-2009, 07:50 PM
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#15
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Registered User
Join Date: Feb 2009
Location: Lockport, IL
Posts: 206
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LOL, I am considering a 4BT or a V* gas not sure which though. i'm kinda on a time line with a somwhat limited budget. although I do already have my Dana 60's
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Sunday Drivers # 5
Jeeps Gone Wild # 43
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>
cummings turbo diesel
