'05' tsb 48RE

[BelgianMagic]

Here ya go

NUMBER: TSB-21-006-07
GROUP: Transmission
DATE: March 20, 2007

SUBJECT:
Flash: New 48RE Feature That Allows Normal Shift Schedule With Full Disable Of 4th Gear Overdrive

OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Cummins Engine Control Module (ECM) with new software.

MODELS:
2005 (DH) Ram Truck (2500/3500)

NOTE: This bulletin applies to vehicles equipped with a 5.9L Cummins turbo-diesel engine and a 48RE automatic transmission (sales codes ETH and DG8
respectively).

SYMPTOM/CONDITION:
1. The following enhancement is included with this software:
a. A new 48RE transmission feature that will allow normal shift schedule with full disable of 4th gear (overdrive gear), when the customer selects the Over-Drive (O/D) switch.
Prior to the implementation of this new transmission feature, the use of the O/D switch changed the automatic transmission shift schedule from a “normal” shift schedule to a tow/haul mode shift schedule, and allowed 4th gear (overdrive gear) engagement.
This new transmission feature will not change the transmission shift schedule, but will allow full 4th gear overdrive disable (lock out). With this new feature the customer will have the “normal” shift schedule with NO overdrive (4th gear).

NOTE: To enable the new 4th gear disable feature, the ECM must first be
reprogrammed (flashed) with the latest software level, and then the 4th gear
disable feature “O/D OFF ENABLE” must be selected (turned on) using the
DRBIII®. Tow/haul mode is not an available feature whenever the DRBIII® has enabled the “O/D OFF ENABLE” selection. :coorslight::m2c::exactly:

[BelgianMagic]

YOU MIGHT NOT want to do this...

I would think with all the bad and blownup torque converters DC has had that this is going to be something other than OD LOCKOUT:m2c:

NITE yall, Flip

[12PACK]

Reason #43 on why I got the NV: "Full disable of 4th gear is determined by the driver and not a TSB." :stirthepot:

[BelgianMagic]

Yea I understand that...I blew up my 1970 pontiac 400 like that shifted when I didn't want it to.... BOOM !