42RE rebuild

**death-mobile** · 08-16-2009, 12:29 PM

http://www.moparchat.com/FORUMS/arch...?t-111289.html

If you skim through this...I have a gut feeling APS did some bad things to my valve body and I need to stop wasting time trying to diagnose it and slap a new one on it.

**cavaliers1323** · 08-16-2009, 03:12 PM

What mods do they actually do?

**cavaliers1323** · 08-16-2009, 03:21 PM

Originally Posted by death-mobile

It's the resistor that was recommended, but honestly, no. I haven't put a meter on it. I never heard of a resistor not working before...but maybe it's worth a shot to put a different brand on it.

Yea it's not very often that they don't work. But they also never work at the advertised resistance. There are different tolerances eg 10%, and yours
may be out of tolerence. Worh a shot, o ky take a couple minutes and eliminate one more thing. You never know, may save you from dropping the pan again.

**death-mobile** · 08-16-2009, 03:23 PM

They won't tell you...it's fucking gay. I asked him to just install the transgo shift kit for street/offroad use. They took it upon themselves to do their "APS tweeks". I have a feeling they might have drilled some passages too big and made this a valve body strictly for off-road or racing or whatever.

I would be all for the o2 sensors being bad since the MIL seems to come on only when the jeep is in the hole going up a hill. Hence...more heat/fuel...tripping out the o2 sensor...creating the P1763. BUT, I never got a code for the o2 sensors...and it's too hard to recreate the fault...so disconnecting the sensors isn't a logical step in troubleshooting.

**death-mobile** · 08-16-2009, 03:25 PM

Originally Posted by cavaliers1323

Yea it's not very often that they don't work. But they also never work at the advertised resistance. There are different tolerances eg 10%, and yours
may be out of tolerence. Worh a shot, o ky take a couple minutes and eliminate one more thing. You never know, may save you from dropping the pan again.

I found an old post from APS on jeepsunlimited and I took the tolerance and resistance right from Wayne's post....but who knows.

**cavaliers1323** · 08-16-2009, 05:02 PM

Its probably the right one, I'm just saying it may be out of tolerance. Do you know what the color bands, multiplier band, and tolerance band is/are?

That is gay, I have a HD trans-go kit ready for install and I was curious about the mod someone mentioned to get flow while in park. But now I'm not so sure....

**death-mobile** · 08-16-2009, 05:06 PM

Don't be afraid of those little things. Those are small fixes, APS did some shit that they thought would be all bad-ass. I should have done the damn thing myself, but if I were to save time, I'd probably buy one from IPT. After all this time of researching about what APS did to my valve body...since they appear to have gone out of buisness...IPT and APS seem to have been feuding for a while. Tranzdude and WayneAPS go at it in a lot of mopar forums.

**cavaliers1323** · 08-16-2009, 09:06 PM

cant seem to find any info on the valve body tweaks, do you know of any?

**cavaliers1323** · 08-17-2009, 08:09 AM

The more I read, the more it sounds like a bad o2 sensor.

**death-mobile** · 08-17-2009, 09:20 AM

I would love that to be the case, but I have yet to get any codes for an o2 sensor. All four of them are original and have about 140K miles on them...but...no codes...

**cavaliers1323** · 08-17-2009, 11:26 AM

Let me dig up a wiring diagram from the FSM, the O2 sensors tied in with a bunch of stuff. Not to long ago my downstream O2 sensor pigtail was resting on my rear diveshaft, and it kept blowing a mini fuse intermitantly. IIRC the fuse was for the ASD relay, so I never thought to check O2 sensor wires. The sensor went bad from being shorted, no codes stored the only reason I knew is because I changed it. With a buck fourty on yours it wouldnt hurt to go ahead and change them! Bit pricey, but if your at wits end....

**cavaliers1323** · 08-20-2009, 06:50 PM

**cavaliers1323** · 08-20-2009, 06:51 PM

**cavaliers1323** · 08-20-2009, 06:52 PM

**cavaliers1323** · 08-20-2009, 06:56 PM

little info on what the O2 sensors are tied into:

**cavaliers1323** · 08-20-2009, 07:16 PM

As you can see the governor pressure sensor is tied into the same circuit as the O2 sensors (K4)

**death-mobile** · 08-21-2009, 11:39 AM

a little confusing...

what do they consider the vehicle speed sensor? the speed sensor is technically the ABS. I have a truspeed calibration tool inline with the abs to correct speedo/tire size, I'm trying to dismiss the possibility of it causing any problems as well...it's been installed for like 4 years, so I doubt it.

i'll probably change the o2 sensors because they are old, but I still have a hard time figuring why ONLY after the rebuild that I get this code now? odd coincidence?

i have to brush up on my schematic reading, but does the transmission temp sensor work into the equation? what about the od solenoid and the other sensors in the block with the governor pressure?

**kaption12** · 08-22-2009, 10:38 AM

Just a newbie here but I have been having ploblems with my 42re as well I talked to these guys and they really helped me out here is their link.
http://www.smrtrans.com/ hope they can help you out.

**cavaliers1323** · 08-22-2009, 05:58 PM

Sorry, for some reason the last image wont upload.

**cavaliers1323** · 08-22-2009, 10:04 PM

Continued from governor pressure sensor.

The temp sensor does play a role.

**cavaliers1323** · 08-23-2009, 09:59 PM

Not to hi-jack but I just pulled my valve body and the accumulator piston spring was broken. And the piston has what seems to be excessive wear, can I just clean it up?

This is what the spring looked like when I pulled it out

Sorry for the shitty pics, iphone sucks.

EDIT: I didn't get a chance to look through the kit, but does anyone know if it comes with a new spring and accumulator seals?

**cavaliers1323** · 08-23-2009, 10:30 PM

FWIW the Trans-go kit came with a resistor, going off memory of the color bands I believe it is a 2500ohm resistor. I will double check tomorrow because my memory is terrible!

EDIT: Good thing I checked, the first band was brown not red. Meaning it is a 1,500 ohm resistor (1.5k ohm) I will defenitly be checking mine before installing it.

**death-mobile** · 08-24-2009, 07:20 PM

Woooah...did you say 1500 ohm??? I have a 150 ohm resistor inline. Can you triple check that to make sure? That would be some shit. The dude from APS posted on another forum about 6 years ago it was a 150ohm 8% tolerance resistor. I would love for that to be the case. I am having a hard time believing the coincidence that directly after the rebuild...that my first day on the road...my o2 sensors started crapping out. I do have some wiring issues with the TPS, but it rarely, and I mean rarely happens, and it will just cause the jeep to stall out...but that happened before the rebuild. I'm leaning towards the pressures created in the body are just TOO HIGH.

**cavaliers1323** · 08-24-2009, 08:58 PM

Color band
If you look at a resistor, one end should have a gold, silver, or white band. Turn the resistor so that this band is to your right. That band represents the resistor’s tolerance. You begin by translating the colored bands into numbers and recording those numbers. For the first and second colored bands, the values are as follows:
Black = 0
Brown = 1
Red = 2
Orange = 3
Yellow = 4
Green = 5
Blue = 6
Violet = 7
Grey = 8
White = 9

Multiplier band
Once you find the values for the first two bands, write them down. For example, if you have a red band and a black band, then the values will be 2 and 0. Put these two numbers together and you’ll get the number 20. The third band is the multiplier band. This is the number you'll multiply the first two bands by to get the resistor’s value. The color scheme for the third band is as follows:
Black = 1
Brown = 10
Red = 100
Orange = 1000 (or 1 K)
Yellow = 10,000 (or 10 K)
Green = 100,000 (or 100 K)
Blue = 1,000,000 (or 1 M)

Tolerance band
Let’s take a look at the tolerance band. The reason for having a tolerance band is that no resistor performs at exactly its rated value. The tolerance band is there to let you know how much the resistor could potentially be off by. A gold resistor means that the rated value is within plus or minus 5 percent of being accurate. A silver band means that the resistor’s actual value may be within plus or minus 10 percent of the rated value. If there is no tolerance band, it means that the resistor has an actual value within plus or minus 20 percent of the rated value.

Brown = 1
Green = 5
Red = 100
Gold = 5%

1500 ohm's 5% tolerance. Thats what came with the Trans-Go kit. 1425-1575 would be the tolerance, mine tested at 1476. A 5 pack at radio shack is $0.99

FWIW- 3-4 accum piston spring is included with the kit

**death-mobile** · 08-25-2009, 10:38 AM

I was going to say...replace all the little parts like that. I replaced a lot of the teflon seals with metal bands too. I knew that metal would wear the case out, but after 150K or whatever this trans lasts...I don't plan on rebuilding it a second time, so I'll take advantage of less leakage using steel.

I can't believe the trans go kit comes with a 1500ohm resistor, and not only did APS NOT mention that I would need a resistor, but when I did find out that it was needed...I got bad advice to use a 150ohm resistor. I'll head to radioshack today and pick up a 5 pack and solder it in later this week. I'll eat my hat if that fixes it.

BTW: the kit you got was for a 42RE? does the vehicle year matter or change what resistor you use?

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