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05-20-2009, 12:05 PM
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#1
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Registered User
Join Date: May 2009
Location: Durand,MI
Posts: 57
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should i use a 700r4 or a 400 trans
so i've got myself a 1995 yj i got from my uncle with a blown up 2.5l so my plan is to put in a 4.3l gm engine and auto trans. but i cant decide whether to use the 400 trans that came with the 4.3 i bought or to use a 700r4 trans which i know i can get my hands on. the jeep will be driven to the trail so i want the overdrive. any pros and cons you guys have will help.
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05-20-2009, 01:10 PM
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#2
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Registered User
Join Date: Oct 2008
Location: on a boat
Posts: 725
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the 400 is strong, depending on the gearing, if you need overdrive or not? what gears? tires size?
__________________
FOR SALE:SOLD
2000 TJ 2.5" CLAYTON L.A. W/HYDROS, SYE/XJ SHAFT, 4:10 GEARS, 8.8 MINI SPOOLED, LOC-RIGHT FRONT, 1" BODY LIFT, 1" MML, 35" MAXXIS BIGHORNS, RE GEN 2DISCOs, BELLY UP, ALCOS IN FRONT, WARN X8000I
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05-20-2009, 01:19 PM
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#3
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Registered User
Join Date: May 2009
Location: Durand,MI
Posts: 57
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havent quite decided yet but the goal will be 35s after axles are swapped out for some stouter ones. gears i dont know yet either. kind of new to building a 4x4 so i dont know what will work best. i had a good idea at some point but dont remember
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05-23-2009, 01:04 PM
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#4
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Registered User
Join Date: Mar 2009
Location: MS
Posts: 6
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watch the 700r4 - you need to make sure the converter is locking in 2nd and 4th or you'll burn it up.
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05-26-2009, 06:59 PM
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#5
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Registered User
Join Date: May 2009
Location: Durand,MI
Posts: 57
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thanks for looking out. it will be awhile before i get to that point. gonna need to find an s10 transfer case soon to use instead of an adapter from the trans to the jeep t case
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05-26-2009, 07:22 PM
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#6
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XJ on 37's
Join Date: Jul 2006
Location: missouri via blackpool,lancs.
Posts: 10,435
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what is the donor? model/year?
most came with 700r4's already.
i wheeled hard on a rebuilt to stock 700r4, never had a single issue with it.
just be sure the case has a big "K" on it and you will be just fine.
you can get a 700r4/231c hd combo from a early90's s10 blazer, FIY.
i would run the K case 700r4 any day of the week myself.
martin
__________________
1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/f12/swap-offically-underway-324622/
Years to gain the hands on experience, and offer it freely.
Minutes to gain the knowledge from the internet, and quote it just as freely.
Choose wisely!
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05-27-2009, 10:13 AM
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#7
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Registered User
Join Date: Jan 2007
Location: Houston, TX
Posts: 2,075
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If you are planning this for a YJ you'll need a different tcase....chevy tcases and axles are all passenger side drop from what I understand. YJ's run Drivers side drop axles and tcases... So unless you plan on swapping your front axle you might want to take this into consideration...
__________________
1985 CJ7 Project
Phase One : 5.3L Vortec/4L60E, Moser axles for AMC20, Twin Stick'd Dana300 - Completed
Phase Two: Bedliner, Rollcage, Seats, BESRK Rear Bumper w/ tire swing, Soft Top, and a few other goodies - Mostly Complete
Phase Three: Waggy 44 front, Scout D44 Rear, 4.56's, ARB's (F/R) SOA with YJ Springs, 35x12.50x15 BFG MT - Not Even Close to beginning
Also a mostly rust-free 1970 Scout 800A That I'll get to start working on someday...
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Chrome won't get you home...BUT Rattle Can Black may just get you back"
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05-27-2009, 10:57 AM
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#8
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XJ on 37's
Join Date: Jul 2006
Location: missouri via blackpool,lancs.
Posts: 10,435
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Quote:
Originally Posted by kickingprop
If you are planning this for a YJ you'll need a different tcase....chevy tcases and axles are all passenger side drop from what I understand. YJ's run Drivers side drop axles and tcases... So unless you plan on swapping your front axle you might want to take this into consideration...
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wrong.
both fullsize and smaller had drivers side drop t/cases. such as the example of the 700r4/231c combo i suggested from a s10 blazer, driver side drop.
241's and 231's were abound in the drivers side drop variety.
dont know why most people think chevys are ALL passenger side drop front axles..... 
have a look at a 700r4 oil pan, and see how fun it would be to put a passenger side drop t/case in there, with the oil pan as offset as it is.... 
martin
__________________
1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622
Years to gain the hands on experience, and offer it freely.
Minutes to gain the knowledge from the internet, and quote it just as freely.
Choose wisely!
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06-10-2010, 02:14 PM
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#9
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Registered User
Join Date: Apr 2010
Location: Las Vegas
Posts: 473
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Quote:
Originally Posted by leftlanetruckin
wrong.
both fullsize and smaller had drivers side drop t/cases. such as the example of the 700r4/231c combo i suggested from a s10 blazer, driver side drop.
241's and 231's were abound in the drivers side drop variety.
dont know why most people think chevys are ALL passenger side drop front axles.....
have a look at a 700r4 oil pan, and see how fun it would be to put a passenger side drop t/case in there, with the oil pan as offset as it is....
martin |
So, TC isn't need on a YJ if you go with a 700r4?
__________________
'97 Cherokee, 99+ intake, 62mm TB, 703 injectors (new), k&n intake, Hypertech III, 180* t-stat (1/8" drilled hole), 2.5" manifold-->tail pipe (Magnaflow muffler & hi flow cat), 4.5" zone lift, 32" Good Year Dura Trac, Rear seat head rests. Comp cam & Performance head (LS1 valves) going in next.
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06-11-2010, 09:35 PM
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#10
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XJ on 37's
Join Date: Jul 2006
Location: missouri via blackpool,lancs.
Posts: 10,435
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You can, and should, use a 231c hd. That will bolt right up to the 700R4 and be the correct drop for the front axle. The mounting pattern and clocking is all wrong on a 231j to bolt up to a 700R4, not to mention the minor issue of the Jeep's 21 or 23 spline input shaft vs the 700R4's 27 spline.
Martin
__________________
1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622
Years to gain the hands on experience, and offer it freely.
Minutes to gain the knowledge from the internet, and quote it just as freely.
Choose wisely!
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06-11-2010, 09:38 PM
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#11
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Registered User
Join Date: Apr 2010
Location: Las Vegas
Posts: 473
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To avoid AA prices to adapt it. Sounds like its cheaper to get the 4.3l motor, 700r4 and the tc then mount it up?
__________________
'97 Cherokee, 99+ intake, 62mm TB, 703 injectors (new), k&n intake, Hypertech III, 180* t-stat (1/8" drilled hole), 2.5" manifold-->tail pipe (Magnaflow muffler & hi flow cat), 4.5" zone lift, 32" Good Year Dura Trac, Rear seat head rests. Comp cam & Performance head (LS1 valves) going in next.
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06-12-2010, 08:26 AM
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#12
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XJ on 37's
Join Date: Jul 2006
Location: missouri via blackpool,lancs.
Posts: 10,435
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Quote:
Originally Posted by Jeeper_YJ
To avoid AA prices to adapt it. Sounds like its cheaper to get the 4.3l motor, 700r4 and the tc then mount it up?
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Wow, wish I had thought of that..............  
This is why EVERY TIME I suggest getting a complete S10 etc to use as a donor. Zero adapters needed.
Martin
__________________
1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622
Years to gain the hands on experience, and offer it freely.
Minutes to gain the knowledge from the internet, and quote it just as freely.
Choose wisely!
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06-12-2010, 08:46 AM
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#13
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Registered User
Join Date: Apr 2010
Location: Las Vegas
Posts: 473
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Quote:
Originally Posted by leftlanetruckin
Wow, wish I had thought of that..............
This is why EVERY TIME I suggest getting a complete S10 etc to use as a donor. Zero adapters needed.
Martin |
And I thought you were older... Nothing like forum humor for the young ones.
All jokes aside, doing research before hand, can save you. Which is what I am going to do. Plan it out. 
__________________
'97 Cherokee, 99+ intake, 62mm TB, 703 injectors (new), k&n intake, Hypertech III, 180* t-stat (1/8" drilled hole), 2.5" manifold-->tail pipe (Magnaflow muffler & hi flow cat), 4.5" zone lift, 32" Good Year Dura Trac, Rear seat head rests. Comp cam & Performance head (LS1 valves) going in next.
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06-12-2010, 10:37 AM
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#14
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XJ on 37's
Join Date: Jul 2006
Location: missouri via blackpool,lancs.
Posts: 10,435
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I posted that because that is exactly what I say to do for every swap, get the whole drivetrain in the donor rig if at all possible. Too many people want to get a motor here, tranny there, and a transfer case from God knows where..... Then ask questions when it doesn't all go together!
A complete donor will also get you the wiring, any cables you need, and so on. Not to mention the guarantee that it will all just bolt together 
I have yet to use a single adapter for any swap I have done myself...... 
Martin
__________________
1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.The Cherylkee....
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover 4.6 HSE
2000 4.7 4WD WJ with a rebuilt motor.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/showthread.php?t=324622
Years to gain the hands on experience, and offer it freely.
Minutes to gain the knowledge from the internet, and quote it just as freely.
Choose wisely!
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>
should i use a 700r4 or a 400 trans
