Trying to figure out what went wrong with 48re (stumped).. - Competition Diesel.Com

Asher · 08-13-2017, 02:34 PM

I have about 30k/2yrs on my rebuilt tranny, the thing was a monster, shifted great, shifted exactly when it was supposed to... no issues at all until Tuesday morning leaving work.. Jumped in pulled across the lot kind of a acceleration/coasting, and about the time it should have went into 2nd gear it just lost everything like it was in neutral, no clunk, no bang nothing... I had reverse as strong as usual but noting in forward gears..

Tranny fluid is as red as the day it was put in, dropped the pan nothing in there, pulled the tranny out and we can't find a single thing wrong. All the clutches (forward/direct/both bands) look as good as the day we put them in, air pressure tested and everything seems to be locking up and working as usual.. The one thing we didn't do was to put a pressure gauge on the tranny before we pulled it out... The only thing that was never touched in this transmission was the rear overdrive assembly, but I can't thing of any reason there is anything in there that would cause this...

Again the truck has strong reverse but nothing in forward gears...

Specs below...

04 Ram 305/555 48re 4x4

-Transgo shift kit (drilled only 1 hole for lock up)
-Sonnax Intermediate Super Servo kit
-Sonnax Billet accumulator
-Governor Solenoid to GM Pressure Control Solenoid Conversion Kit
-Billet Band anchor
-HD Band strut
-4.2:1 apply lever
-Extreme Duty Brass Impregnated Carbon Fiber Flex Band
-HD reverse band
-5 Red Eagle clutches and Kolene steels
-7 Red Eagle clutches and Kolene steels
-Billet input shaft
-Heavy Duty flexpalte
-DPC triple disk converter

Again the fluid looks great, nothing in the pan... I'm stumped....

Could there be something in the valve body that is causing this?

This is a home built tranny, built by my dad (retired Chrysler master tech, and myself) so no shop was involved..

Thank you in advance for any input...

joefarmer · 08-14-2017, 11:08 AM

I'd say put pressure gauges on it and see which pressure is off.

dangerous06 · 08-17-2017, 09:18 PM

Valve body issue

Red Sleeper · 08-24-2017, 08:19 AM

Did you tear into the trans and find anything wrong?

YOUNG GUNS15 · 08-24-2017, 02:03 PM

Forward clutch piston lip seal?

Sent from my iPhone using Tapatalk

msantwire · 09-25-2017, 06:36 AM

Quote:

Originally Posted by YOUNG GUNS15

Forward clutch piston lip seal?

Sent from my iPhone using Tapatalk

what this guy said.

08-13-2017, 02:34 PM	#1
Asher Name: Asher Title: Rookie Status: Not Here Join Date: Mar 2015 Member`s Gallery Posts: 9	Trying to figure out what went wrong with 48re (stumped).. I have about 30k/2yrs on my rebuilt tranny, the thing was a monster, shifted great, shifted exactly when it was supposed to... no issues at all until Tuesday morning leaving work.. Jumped in pulled across the lot kind of a acceleration/coasting, and about the time it should have went into 2nd gear it just lost everything like it was in neutral, no clunk, no bang nothing... I had reverse as strong as usual but noting in forward gears.. Tranny fluid is as red as the day it was put in, dropped the pan nothing in there, pulled the tranny out and we can't find a single thing wrong. All the clutches (forward/direct/both bands) look as good as the day we put them in, air pressure tested and everything seems to be locking up and working as usual.. The one thing we didn't do was to put a pressure gauge on the tranny before we pulled it out... The only thing that was never touched in this transmission was the rear overdrive assembly, but I can't thing of any reason there is anything in there that would cause this... Again the truck has strong reverse but nothing in forward gears... Specs below... 04 Ram 305/555 48re 4x4 -Transgo shift kit (drilled only 1 hole for lock up) -Sonnax Intermediate Super Servo kit -Sonnax Billet accumulator -Governor Solenoid to GM Pressure Control Solenoid Conversion Kit -Billet Band anchor -HD Band strut -4.2:1 apply lever -Extreme Duty Brass Impregnated Carbon Fiber Flex Band -HD reverse band -5 Red Eagle clutches and Kolene steels -7 Red Eagle clutches and Kolene steels -Billet input shaft -Heavy Duty flexpalte -DPC triple disk converter Again the fluid looks great, nothing in the pan... I'm stumped.... Could there be something in the valve body that is causing this? This is a home built tranny, built by my dad (retired Chrysler master tech, and myself) so no shop was involved.. Thank you in advance for any input...

08-14-2017, 11:08 AM	#2
joefarmer Name: joefarmer Title: MR. Supreme Overlord Status: Not Here Join Date: Jul 2006 Location: ohio Member`s Gallery Posts: 6,137	I'd say put pressure gauges on it and see which pressure is off. __________________ brandon'); DROP TABLE Users;-- 1948 Dodge 1.5t 12v RH swap \| 99 F250 12v RE test rkt \| 11 X5 'no soup' \| 08 F250 CR RE swap \| 05 2500 CR 68 standalone firepunk.com

08-17-2017, 09:18 PM	#3
dangerous06 Name: dangerous06 Title: diesel tech Status: Not Here Join Date: Mar 2008 Location: Escondido CA Member`s Gallery Posts: 3,564	Valve body issue __________________ E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built 48RE, 5" exhaust,Carrillo rods, Pacbrake!

08-24-2017, 08:19 AM	#4
Red Sleeper Name: Red Sleeper Title: Too Much Time Status: Not Here Join Date: Aug 2009 Location: Lone Star State Member`s Gallery Posts: 4,597	Did you tear into the trans and find anything wrong? __________________ Nick J '14 Silverado LTZ 5.3 4wd '05 Cummins QCSB 4wd 48re '91 Cummins w350 5spd

08-24-2017, 02:03 PM	#5
YOUNG GUNS15 Name: YOUNG GUNS15 Title: Im AWESOME!!!! Status: Not Here Join Date: Sep 2009 Location: Utah Member`s Gallery Posts: 7,346	Forward clutch piston lip seal? Sent from my iPhone using Tapatalk __________________ Spence -1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O -2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp