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07-30-2015, 04:04 AM
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#1
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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47re no 3rd gear
So trans has been good since I got the truck back a couple weeks ago. Been hauling with it, no racing, haven't even been full throttle with it yet. Today while driving home from work, I unlocked the trans while slowing down at a red light. Went to take off, 2nd gear shift was very delayed and then harsh, and it wouldn't go into 3rd at all. Then I lost 2nd for about 10 seconds.
Any ideas? Oil is full, doesn't smell burnt.
__________________
Mike Hill
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07-30-2015, 10:31 AM
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#2
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Went out and test drove it again this morning with some rest and a calm mind.
Got 3rd gear twice, and then on 3rd attempt it just stays in 2nd. No sure if it's heat related this time or not, but it's pretty annoying.
__________________
Mike Hill
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07-30-2015, 10:35 AM
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#3
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Name: LAmiller
Title: THE KT-BOUNDARY
Status: Not Here
Join Date: Aug 2006
Location: Plain City, OH
Member`s Gallery
Posts: 3,603
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Regular high pressure valve body or Full manual? Govenor pressure controls 1-2 and 2-3 shift points, so if the solenoid is stuck or the Output shaft speed sensor is glitching it can give you those symptoms. Does 3rd feel solid when it does engage?
Lavon
__________________
04.5 QDLB 4x4 Diesel Power Challenge 2014/2015 Champion, ODSS 6.70 Points Champion 2015/2016
06 RaceCab 4x4 Ulimate Callout Challenge 2016, 2017, 2018 Champion, ODSS Pro Street Points Champion 2016
2016 QDLB 4x4, Firepunk EZLynk.
http://www.shop.firepunk.com
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07-30-2015, 02:11 PM
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#4
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Quote:
Originally Posted by LAmiller
Regular high pressure valve body or Full manual? Govenor pressure controls 1-2 and 2-3 shift points, so if the solenoid is stuck or the Output shaft speed sensor is glitching it can give you those symptoms. Does 3rd feel solid when it does engage?
Lavon
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Full manual, constant pressure. When it does shift, it feels normal. I'll check the speed sensor tonight. Is it possible for the Speedo to still be accurate if the sensor is bad in any way? Can I unplug the harness to help diagnose?
Thanks!
__________________
Mike Hill
Last edited by madmikeismad; 07-30-2015 at 02:22 PM.
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07-30-2015, 05:32 PM
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#5
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Name: LAmiller
Title: THE KT-BOUNDARY
Status: Not Here
Join Date: Aug 2006
Location: Plain City, OH
Member`s Gallery
Posts: 3,603
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If its full manual then the Gov pressure solenoid is unplugged and run wide open all the time so the speed sensor/gov pressure control should not be your problem. try loosening your TV cable a little and see if it shifts (assuming you have it tied back)
Lavon
__________________
04.5 QDLB 4x4 Diesel Power Challenge 2014/2015 Champion, ODSS 6.70 Points Champion 2015/2016
06 RaceCab 4x4 Ulimate Callout Challenge 2016, 2017, 2018 Champion, ODSS Pro Street Points Champion 2016
2016 QDLB 4x4, Firepunk EZLynk.
http://www.shop.firepunk.com
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07-30-2015, 06:28 PM
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#6
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Quote:
Originally Posted by LAmiller
If its full manual then the Gov pressure solenoid is unplugged and run wide open all the time so the speed sensor/gov pressure control should not be your problem. try loosening your TV cable a little and see if it shifts (assuming you have it tied back)
Lavon
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I'll try that.
But I was under the impression that the tv arm was no longer functioning. I could have misunderstood though. I know the cable is just tied out of the way under the truck.
Thanks.
__________________
Mike Hill
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07-30-2015, 07:39 PM
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#7
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Name: RDPsmoker
Title: OUT TO LUNCH..
Status: Not Here
Join Date: Nov 2010
Location: Casper or Laramie WY
Member`s Gallery
Posts: 1,815
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Damn mike you must live on top of Indian burial grounds or something!
__________________
-DUSTIN-
THANKS TO MAXTORQ
95 2500
-DPC
-SUNCOAST
03 3500
-Stock for now
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07-30-2015, 09:32 PM
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#8
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Quote:
Originally Posted by RDPsmoker
Damn mike you must live on top of Indian burial grounds or something!
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No crap. Since I bought this house, I can't keep my cars together. I've even slowed down and dropped power and stuff is still being stupid.
__________________
Mike Hill
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07-30-2015, 10:30 PM
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#9
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Quote:
Originally Posted by madmikeismad
So trans has been good since I got the truck back a couple weeks ago. Been hauling with it, no racing, haven't even been full throttle with it yet. Today while driving home from work, I unlocked the trans while slowing down at a red light. Went to take off, 2nd gear shift was very delayed and then harsh, and it wouldn't go into 3rd at all. Then I lost 2nd for about 10 seconds.
Any ideas? Oil is full, doesn't smell burnt.
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Quote:
Originally Posted by LAmiller
Regular high pressure valve body or Full manual? Govenor pressure controls 1-2 and 2-3 shift points, so if the solenoid is stuck or the Output shaft speed sensor is glitching it can give you those symptoms. Does 3rd feel solid when it does engage?
Lavon
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Quote:
Originally Posted by madmikeismad
Full manual, constant pressure. When it does shift, it feels normal. I'll check the speed sensor tonight. Is it possible for the Speedo to still be accurate if the sensor is bad in any way? Can I unplug the harness to help diagnose?
Thanks!
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Quote:
Originally Posted by LAmiller
If its full manual then the Gov pressure solenoid is unplugged and run wide open all the time so the speed sensor/gov pressure control should not be your problem. try loosening your TV cable a little and see if it shifts (assuming you have it tied back)
Lavon
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Quote:
Originally Posted by madmikeismad
I'll try that.
But I was under the impression that the tv arm was no longer functioning. I could have misunderstood though. I know the cable is just tied out of the way under the truck.
Thanks.
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Just for organization.
Went out tonight and tried again. Just a bunch of starts and stops. Start in 1st, through all the gears, then OD and LU. 3rd works every time for about 4 minutes. Then I lose 3rd until I let out of the throttle/rpm's just a tad, and it grabs. Then I lose it completely until I shut down the truck and it completely cools down.
I looked for the TV lever, can't find it, and where I remember it being on the front left above the trans pan flange, is just what feels like a plug (can't see it).
__________________
Mike Hill
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07-31-2015, 05:23 PM
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#10
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Did some more diagnostic driving. Same as before, but today I locked it in 2nd, and then shifted to 3rd, wait 5 seconds and success! Jerks really hard and chirps the tires unless I stay in the throttle, but it does do locked shifts to 3rd, and then everything works from there. I can unlock, turn OD on/off, etc and it will always hold 3rd, even if I slow down to a crawl and roll back into it softly. I didn't think to flip OD on and see if it would shift, but I didn't think it would be of any value to try.
So conclusion:
Full manual, constant pressure valvebody, fresh rebuild less than a month ago.
Truck will only shift to 3rd if it's cold, or if converter is locked when warm.
What could that mean?
__________________
Mike Hill
Last edited by madmikeismad; 07-31-2015 at 05:25 PM.
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08-01-2015, 10:41 PM
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#11
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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So using this chart, my front clutch pack isn't engaging? What tells it to engage, and why would it only do it with locked converter? I'm assuming a small leak somewhere, that's why pressure is ok when it's cold, but I don't get the converter deal.
__________________
Mike Hill
Last edited by madmikeismad; 08-01-2015 at 10:43 PM.
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08-02-2015, 12:01 PM
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#12
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Name: lorendiesel5.9
Title: OG Hunnybadger
Status: Not Here
Join Date: Apr 2009
Location: NE IA or the lower 48
Member`s Gallery
Posts: 3,909
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Isn't line pressure higher when the convertor is locked?
__________________
Rest in Peace Dex aka BFD99 6/2/12
97 #12vqclbmafia slipping auto
00 Pete 378 12.7 Detroit 10spd
03 Pete 379 6NZ Caterpillar 18spd
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08-02-2015, 12:34 PM
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#13
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Quote:
Originally Posted by lorendiesel5.9
Isn't line pressure higher when the convertor is locked?
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I'd like to say yes, but I don't know for sure. If it is actually higher, that would explain the problem, and I believe that would mean I am indeed losing pressure somewhere that keeps the front clutch from engaging?
__________________
Mike Hill
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08-04-2015, 12:38 PM
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#14
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Name: ChrisG88
Title: Diesel Enthusiast
Status: Not Here
Join Date: Jun 2011
Location: Mechanicsburg PA
Member`s Gallery
Posts: 219
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Line pressure should be higher in lockup. Mine increase by about 20-25 psi in lockup.
__________________
2006 QCSB 6300lbs 5.60@130.5
CG Diesel Performance Transmissions 48RE
Gtx5533r 91mm
400% Exergy
2x 12mm Exergy
Nitrous Express
Goerend Transmission
Firepunk Diesel
D&J Precision
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08-04-2015, 12:49 PM
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#15
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Quote:
Originally Posted by ChrisG88
Line pressure should be higher in lockup. Mine increase by about 20-25 psi in lockup.
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Thanks. I'm pretty confident that I've found the problem then, just gotta hope the builder will fix it.
__________________
Mike Hill
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08-04-2015, 12:50 PM
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#16
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Name: ChrisG88
Title: Diesel Enthusiast
Status: Not Here
Join Date: Jun 2011
Location: Mechanicsburg PA
Member`s Gallery
Posts: 219
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Keep us posted please.
__________________
2006 QCSB 6300lbs 5.60@130.5
CG Diesel Performance Transmissions 48RE
Gtx5533r 91mm
400% Exergy
2x 12mm Exergy
Nitrous Express
Goerend Transmission
Firepunk Diesel
D&J Precision
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08-04-2015, 12:54 PM
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#17
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Quote:
Originally Posted by ChrisG88
Keep us posted please.
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I always try. I hate leaving a dead end thread. I get pissed when I'm looking for something, find someone with the same problem, and the pricks never post the fix.
__________________
Mike Hill
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08-07-2015, 10:36 AM
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#18
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Name: raychem
Title: Not enough time
Status: Not Here
Join Date: Sep 2006
Member`s Gallery
Posts: 476
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Mike,
Put a pressure gauge, at least 200 psi in the front servo port of the transmission. Check the pressure gauge when you shift to 3rd. Check it cold when it is working and check it when it is hot when it is not working. This will tell you the apply pressure for direct (3rd). Use the same rpm to check... say 1800 rpm for both checks. If you see a large pressure drop from cold to hot that will explain the delay in 3rd. Trans fluid from cold to hot should experience a 3-5 psi drop in overall pressure with dex 3. I had something similar bite me a few years back and it was a cracked case which like you took a few drops of the transmission to get ironed out. My other recommendation would be to run a stock VB as a double check.
As for converter drain back. Unfortunately many builders drill a passage in the lube regulator valve passage which allows for lube in park but the converter will drain when not running.
Get back to us on this.
Last edited by raychem; 08-07-2015 at 10:39 AM.
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08-08-2015, 12:13 PM
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#19
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Name: madmikeismad
Title: So mad
Status: Not Here
Join Date: Dec 2009
Location: Newalla, OK
Member`s Gallery
Posts: 14,347
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Quote:
Originally Posted by raychem
Mike,
Put a pressure gauge, at least 200 psi in the front servo port of the transmission. Check the pressure gauge when you shift to 3rd. Check it cold when it is working and check it when it is hot when it is not working. This will tell you the apply pressure for direct (3rd). Use the same rpm to check... say 1800 rpm for both checks. If you see a large pressure drop from cold to hot that will explain the delay in 3rd. Trans fluid from cold to hot should experience a 3-5 psi drop in overall pressure with dex 3. I had something similar bite me a few years back and it was a cracked case which like you took a few drops of the transmission to get ironed out. My other recommendation would be to run a stock VB as a double check.
As for converter drain back. Unfortunately many builders drill a passage in the lube regulator valve passage which allows for lube in park but the converter will drain when not running.
Get back to us on this.
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Thanks, for clearing up that drain back thing. The lube in park is probalby what I've always experienced, so I never noticed the drain back lol. Maybe the hole is just a little bigger now or something.
Anyhow, the truck is back to get fixed, so hopefully this week I'll know what was wrong. I can tell you, the builder is not afraid to thrash on a trans lol. Once I told him it will shift just fine with the tc locked, he proceeded to do every upshift and downshift with the tc locked What a ride. I'm very glad I just put in new ujoints.
__________________
Mike Hill
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