Dodge Cummins Diesel Forum - View Single Post

flubyux2 · 09-14-2007, 10:39 PM

i did it ALL except buying a noise filter from an aftermarket source

Remove engine harness and install braided noise sheilding on TPS wires from TPS to PCM and on Trans control wires from Trans to PCM. (this precludes the need for a noise filter since the braided sheilding prevents the noise from entering the wires intially)

Ground PCM case w/ 8awg fine-strand cable to negative battery ground

Replace Ground cables on battery

Replace Gov Press sensor and Gov solenoid

Replace trans fluid and filter

Replace Output shaft speed sensor

Remanufacture PCM

Rebuild Generator.

my Gov sensor/solenoid were faulty and that got my PCM out of limp and allowed it to shift normally. however, nighttime driving made the TC lockup, OD/D shifting problem apparant. i knew it was dependant on electrical load since it only happened at night, when running the lighting increased the Generator load dramatically. turns out the brush in the generator was worn down to the shoe and was arcing out on the armature. this acring created RFI which was introduced into the harness and the PCM via inductance. replacing this brush (even though my truck produced 14v while running and showed no evident signs of failure) solved my shifting problems 100% . my truck is now shifts as strongly, predictably and reliably as it did when it first rolled of the Lot.

Moral of the story; REBUILD YOUR GENERATOR FIRST, before buying ANYTHING else.

__________________
`97 12v 2500, STD cab, 12v, #100 plate, tweaked AFC, Tabbed KDP, 4" FBD exh, BHAF, Built 47RE/VB/DTT 89% TC, 2wd, 3rd Gen Rims, 3.55's, PSI/Trans/EGT guages... And a `97 Dually "Handshaker"!

Last edited by flubyux2 : 09-14-2007 at 10:49 PM.

09-14-2007, 10:39 PM	#12 (permalink)
flubyux2 Cummins Nut Join Date: Dec 2006 Location: Spring Hill, FL Posts: 364 flubyux2's Truck Pics	i did it ALL except buying a noise filter from an aftermarket source Remove engine harness and install braided noise sheilding on TPS wires from TPS to PCM and on Trans control wires from Trans to PCM. (this precludes the need for a noise filter since the braided sheilding prevents the noise from entering the wires intially) Ground PCM case w/ 8awg fine-strand cable to negative battery ground Replace Ground cables on battery Replace Gov Press sensor and Gov solenoid Replace trans fluid and filter Replace Output shaft speed sensor Remanufacture PCM Rebuild Generator. my Gov sensor/solenoid were faulty and that got my PCM out of limp and allowed it to shift normally. however, nighttime driving made the TC lockup, OD/D shifting problem apparant. i knew it was dependant on electrical load since it only happened at night, when running the lighting increased the Generator load dramatically. turns out the brush in the generator was worn down to the shoe and was arcing out on the armature. this acring created RFI which was introduced into the harness and the PCM via inductance. replacing this brush (even though my truck produced 14v while running and showed no evident signs of failure) solved my shifting problems 100% . my truck is now shifts as strongly, predictably and reliably as it did when it first rolled of the Lot. Moral of the story; REBUILD YOUR GENERATOR FIRST, before buying ANYTHING else. __________________ `97 12v 2500, STD cab, 12v, #100 plate, tweaked AFC, Tabbed KDP, 4" FBD exh, BHAF, Built 47RE/VB/DTT 89% TC, 2wd, 3rd Gen Rims, 3.55's, PSI/Trans/EGT guages... And a `97 Dually "Handshaker"! Last edited by flubyux2 : 09-14-2007 at 10:49 PM.