46RH swap into 96-98??? - JeepForum.com

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post #1 of 19 Old 08-02-2010, 11:14 PM Thread Starter
freakinheep89
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46RH swap into 96-98???

Ive been thinking about the long run plans on my ZJ. I was wondering your honest opinions about whether or not I should sell my 95(OBDI) to get a 96-98(OBDII). the only thing keeping me holding onto the 95 is that the 46RH is stronger than the 46re.

The Problem: i want to do a motor swap to a 5.9 (maybe even stroke it or do a 408 stroker) but I dont want to abandon the FI system. They dont make any programmers or SCT tunes for OBDI equipped jeeps.

Possible solution: ditch the 95 and grab a 96-98 V8 to obtain the OBDII system and wayy more capability.

My hang-up: I have heard that the 46re is a "weak" trans, and I dont wanna lose my 46rh because i have heard its "strong".

I know you can do a 5.9 swap to a 46rh but can you do a 46rh swap to a 96-98 ZJ?

Anyone who has more experience with this and could shed some light on the situation would be greatly appreciated.

T.J.


TJ-
95 ZJ 5.2- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.

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How would i go about Stroking it?
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post #2 of 19 Old 08-02-2010, 11:20 PM
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they are both the same strength one is just an electronic version of the other
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post #3 of 19 Old 08-02-2010, 11:24 PM Thread Starter
freakinheep89
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elaborate please

TJ-
95 ZJ 5.2- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.

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How would i go about Stroking it?
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post #4 of 19 Old 08-02-2010, 11:44 PM
ratmonkey
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One uses an electronic governor the other doesn't. Everything else beside the valve body and od unit is the same.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #5 of 19 Old 08-03-2010, 11:59 AM Thread Starter
freakinheep89
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gotcha, alright I'm gonna guess and say since the RE has OBDII that its the one with the electronic gov, but what I really wanna know is can i swap an RH into a 96-98, or would the PCM not function right due to lack of electronic governor? I know you all say their the same strength but i would rather keep the RH if at all possible cause it was rebuilt 18k miles ago.

TJ-
95 ZJ 5.2- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.

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Originally Posted by slayercr23 View Post
How would i go about Stroking it?
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post #6 of 19 Old 08-03-2010, 02:36 PM
JrMechanic
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NO. It's been asked several times and it is not feasible, plus it's pointless.

You will need custom drive shafts (RH OD unit is longer, and can't use DS's from a 93-95 due to the different pinion lengths on the LP30's, as well as the D35/D44a).

You will have no way to control the TCC or overdrive without a 93-95 V8 PCM. The RE transmissions use a separate TCM to control the transmission functions and would not work with the RH transmission. The only option would be to wire the TCC and OD solenoids directly to a couple of toggle switches.

Then you would also need a transfer case with a 1.55" input to match the 46RH.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #7 of 19 Old 08-03-2010, 03:36 PM
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Rh uses tcm re uses pcm. You'd need to build a tcm for 96-98 and use an ecu from a manual dodge to use the rh trans in obdii.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #8 of 19 Old 08-03-2010, 04:48 PM
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Quote:
Originally Posted by ratmonkey View Post
Rh uses tcm re uses pcm. You'd need to build a tcm for 96-98 and use an ecu from a manual dodge to use the rh trans in obdii.
46RH definitely uses the PCM for TCC and OD solenoid function, Rat.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #9 of 19 Old 08-03-2010, 05:13 PM
ratmonkey
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my bad, you'd still need to build one to use it in an obdii vehicle as there is no interface for it.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #10 of 19 Old 08-03-2010, 05:35 PM
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Late ChryCo transmission naming system (I'll use ones we know about - 37RH, 42RE, and 46RE):

37RH - Three forward speeds, "relative strength index" of 7, Rear-Wheel Drive/Longitudinal Mount, Hydraulic Controls (this is the old A727.)

42RE - Four forward speeds, "relative strength index" of 2, RWD/Longitudinal, Electronic controls (shift and/or governor.) (Behind the 6-242 in the ZJ and WJ)

46RE - Four forward speeds, "RSI" of 6, RWD/Long, Electronic controls (shift and/or governor) (Behind the LA-block V8 in the ZJ)

A few additional examples:

45RFE - Transitional model: Four forward speeds, RSI of 2, RWD/Longitudinal, "full electronic" controls . (Behind the V8-287 in the WJ. Notable for also having two second gear ratios - a "second upshift" and a "second downshift.")

The chart on the Wiki page seems to be reasonably accurate, but I intend to verify it and flesh it out a bit when I get in contact with someone at ChryCo engineering: List of Chrysler transmissions - Wikipedia, the free encyclopedia.

It is worth noting that the "Big 3" automakers have all adopted substantially similar naming systems for their in-house slushboxen - rather than the hodgepodge of model numbers you had to wade through and recall the comparisons for before.

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post #11 of 19 Old 08-03-2010, 05:38 PM
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Quote:
Originally Posted by ratmonkey View Post
my bad, you'd still need to build one to use it in an obdii vehicle as there is no interface for it.
Yeah, it would be almost impossible to make it work without reverting the entire Jeep to OBD I. The easiest thing to do would be to run a hot wire to the transmission and a separate toggle switch to each ground to control the TCC and OD functions. They also make aftermarket controllers for that type of thing, and you can also use a vacuum switch for the TCC.

Not worth the amount of time, rigging, and money involved to make it work... Leave well enough alone.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #12 of 19 Old 08-03-2010, 09:07 PM Thread Starter
freakinheep89
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Ok thanks for all the replies. Its alot more clear now. Ok final question, in your opinions, am i better off getting an OBDII equipped jeep instead of my 95? it seems like there are so many more possibilities with OBDII especially if i'm tryin to get some power out of it. I've found some good deals on some and just feel like its a better system

TJ-
95 ZJ 5.2- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.

Quote:
Originally Posted by slayercr23 View Post
How would i go about Stroking it?
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post #13 of 19 Old 08-03-2010, 10:00 PM
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One point not mentioned here is that the 96-98 5.2's have a 44RE , slightly weaker that the 46RE which is only found in the 98 5.9 model , as you know , 93-95 5.2's have the 46RH

most trans issues are from poor maintenance , insufficiant cooling and the check valve sticking . Install a good cooler , change oil and filter regularly , and remove the check valve . it will give your trans much better odds .

You can get just as good power from a OBD1 , plug and plays are limited , but the bolt on's are endless
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post #14 of 19 Old 08-03-2010, 10:06 PM Thread Starter
freakinheep89
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yea i know but when you start adding the endless bolt ons, it gets to a point when the PCM cant handle the parts and you have to get a tune or programmer

TJ-
95 ZJ 5.2- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.

Quote:
Originally Posted by slayercr23 View Post
How would i go about Stroking it?
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post #15 of 19 Old 08-04-2010, 02:14 AM Thread Starter
freakinheep89
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Ok one more question... i just happen to have a trans(46re) from a 98 5.9, and since i would be doing a 5.9 swap into a 5.2 anyway, would i be able to swap the 46re in place of the 44re. both are in OBDII, so i dont see why it wouldnt work unless I would also need a PCM from a 98 5.9

TJ-
95 ZJ 5.2- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.

Quote:
Originally Posted by slayercr23 View Post
How would i go about Stroking it?
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