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Go Back JeepForum.com > Models > Jeep Cherokee & Comanche Forums > MJ Comanche Technical Forum > 351w swap questions

Building a Bumper?Ruffstuff Axle Simple Swap Kit!~Artec JK 1 TON SWAP~

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Unread 02-28-2012, 01:23 AM   #1
Thegtwyo86
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Join Date: Feb 2012
Location: Zephyrhills, Florida
Posts: 2
351w swap questions

I am looking in to doing a ford 351w swap in to my Comanche. I was wondering if anyone has done this swap,also if anyone could give me some info on transmission and transfer case options. I would prefer to go with an auto tranny if at all possible.......

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Unread 03-10-2012, 10:03 PM   #2
ltrail
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1984 XJ Cherokee 
 
Join Date: Sep 2010
Location: mesa, AZ
Posts: 1,461
Engine tranny and tease from bronco should do. Or f150?
Does it need to be 351w?
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84 xj 350tbi, sm465, 203/205, 60/70. links and other junk.
what size sawzall blades does it take to fit 40's?
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Unread 03-10-2012, 10:46 PM   #3
Garvin
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1986 MJ Comanche 
 
Join Date: Feb 2005
Location: Wrightstown, New Jersey
Posts: 313
Full size Bronco's had the 351W in them. When I was looking at doing the Ford swap, I was looking at an F250 for the setup with the 351W/ZR5/205 setup, the ZR5 is a stick though. I think they came with E4OD's for the automatics. I think the late 70's/80's also came with a C-6.

Now the question is, is there a reason you need to jump up to that size of an engine? You going to be moving big tires or racing or just looking for a little bit more up and go?
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[B]1986 Jeep Comanche 126000+ miles[/B]
Long Bed, Chevy 350 TPI (5.7L V8), AX15, NP231
Roll Bar, 15/38.5R16.5 Ground Hawgs, Bastard lift (Custom 3-link long arm system, 4.5" Rusty's front springs w/ 1.75" spacers and 6.5" RC shocks, SOA rear), Dana 60HP/Sterling 10.25, 4.10's, Recessed winch, more mods to come...

[B]1992 Jeep Comanche 174000+ miles[/B]
Short Bed, 4.0L I6 HO, AX15, NP231
In the process of doing a frame up restoration.

...RIP...
[B]1990 Jeep Cherokee XJ 207774 miles[/B]
4.0L I6, AW4, NP231. Tom Woods SYE and Drive Shaft, Rusty's 8.0" Long Arm Suspension Lift, 36/13.5R15 Super Swamper IROK's, Dana 30 Front, Tube Diff Guard, Dana 44 Rear, 4.56 gears, Ox Locker, disc brake conversion
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Unread 03-11-2012, 10:04 PM   #4
ltrail
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1984 XJ Cherokee 
 
Join Date: Sep 2010
Location: mesa, AZ
Posts: 1,461
E4od is a solid unit and easy rebuild. Im going from 4cyl 4spd to 350 and 700r4. But with the early 90's t case 231 i believe, so I keep driver drop and run my hp ford 44 and a 9". The bronco swap was my second choice had I not found a chevy pickup as a donor!
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84 xj 350tbi, sm465, 203/205, 60/70. links and other junk.
what size sawzall blades does it take to fit 40's?
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Unread 03-11-2012, 10:06 PM   #5
ltrail
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1984 XJ Cherokee 
 
Join Date: Sep 2010
Location: mesa, AZ
Posts: 1,461
I was thinking the 205 or 208 had a poor gear reduction? Only 1.97-1? Could be wrong but one of the factory cases had an ugly crawl ratio.
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84 xj 350tbi, sm465, 203/205, 60/70. links and other junk.
what size sawzall blades does it take to fit 40's?
ltrail is offline   Reply With Quote
Unread 03-11-2012, 10:12 PM   #6
Garvin
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1986 MJ Comanche 
 
Join Date: Feb 2005
Location: Wrightstown, New Jersey
Posts: 313
205 is the Ford one with an ugly ratio. I think you're about right with that number. I know a few people that run 203/205 doublers and have just under 4:00:1 in low low, which I really don't understand why. A 231 is 2.73:1 and Dana 300 is 2.62:1, leaving you with a nice 7.16:1 low low. The advantage of the 205 is that it is strong and has the iron case (opposed to the 231 with the aluminum housing). I honestly forget if it is gear driven or chain driven.

With my MJ I ended up going from the V6 to the 350, a bit larger of a change than you since, sadly, mine put out less power.
__________________
[B]1986 Jeep Comanche 126000+ miles[/B]
Long Bed, Chevy 350 TPI (5.7L V8), AX15, NP231
Roll Bar, 15/38.5R16.5 Ground Hawgs, Bastard lift (Custom 3-link long arm system, 4.5" Rusty's front springs w/ 1.75" spacers and 6.5" RC shocks, SOA rear), Dana 60HP/Sterling 10.25, 4.10's, Recessed winch, more mods to come...

[B]1992 Jeep Comanche 174000+ miles[/B]
Short Bed, 4.0L I6 HO, AX15, NP231
In the process of doing a frame up restoration.

...RIP...
[B]1990 Jeep Cherokee XJ 207774 miles[/B]
4.0L I6, AW4, NP231. Tom Woods SYE and Drive Shaft, Rusty's 8.0" Long Arm Suspension Lift, 36/13.5R15 Super Swamper IROK's, Dana 30 Front, Tube Diff Guard, Dana 44 Rear, 4.56 gears, Ox Locker, disc brake conversion
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Unread 03-11-2012, 10:25 PM   #7
ltrail
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1984 XJ Cherokee 
 
Join Date: Sep 2010
Location: mesa, AZ
Posts: 1,461
Ya, the ugly ratio is blessed with a gear drive making it an excellent doubler! Been thinking of doing such. My buddy picked up a samurai with a 6.5-1 case and it's amazing ! I checked out today when we wheeled. It was awesome!
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84 xj 350tbi, sm465, 203/205, 60/70. links and other junk.
what size sawzall blades does it take to fit 40's?
ltrail is offline   Reply With Quote




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