12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

All rmp's no go

Thread Tools
 
Search this Thread
 
  #1  
Old 09-30-2011, 06:15 AM
98.12.valve's Avatar
Diesel Fan
Thread Starter
Join Date: Aug 2011
Location: Florida
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
Default All rmp's no go

When i take off with my truck i can give it about half throttle and it goes up to about 1700 rpms and it slowly takes off, im afraid this is wasting a lot of diesel and it isnt cheap! last time i checked i was only getting about 12 mpgs with stock everything! the injector pump is turned up a little bit, can someone help me please if i turned the pump back down would i get better mpgs and would that affect how slow it takes off? or is it slow cus its so much weight?
 
  #2  
Old 09-30-2011, 09:33 AM
Al31031's Avatar
Diesel Enthusiast
Join Date: Sep 2011
Location: upstate NY
Posts: 280
Received 7 Likes on 7 Posts
Default

how much weight?
 
  #3  
Old 09-30-2011, 11:03 AM
94 12valve's Avatar
Diesel Bomber
Join Date: Jan 2009
Location: Pylesville, Maryland
Posts: 3,504
Received 157 Likes on 142 Posts
Default

how does your tranny fluid smell/look? sounds like your TC needs some help
 
  #4  
Old 09-30-2011, 11:23 AM
Benjamin's Avatar
Bombardier
Join Date: Mar 2007
Location: Da' Dirty South
Posts: 9,655
Received 607 Likes on 502 Posts
Default

welcome to a stock auto transmission. mine did that and eventually would have to get to about 2100 before it would pull and would hold 3000 everytime it would shift and not change RPM.... but that was after a couple years of abuse.

depending on your mileage and the condition of the fluid you might can get away with a good converter and a valve body, if the fluid looks DARK and the mileage is high you might want to look into a full rebuild. but when you rebuild, look for a GOOD converter and valve body, on these parts you get what you pay for, cheaper is not better.....
 
  #5  
Old 10-01-2011, 06:50 PM
mikej's Avatar
Diesel Fan
Join Date: Jun 2011
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Default

I got a full built Goerend tranny as far as i can tell the thing seems to be unbreakable.By the time you buy tc and valve body have someone install it you are taking a big chance with a lot money.
 
  #6  
Old 10-03-2011, 06:23 AM
98.12.valve's Avatar
Diesel Fan
Thread Starter
Join Date: Aug 2011
Location: Florida
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
Default

I know the trannies been rebuilt i just dont know how well, when i put it in gear though the truck bumps forward slightly and when i let off the gas it does this also, i have to get up to about 1800-2000 rpms to accelerate at a decent speed.
 
  #7  
Old 10-03-2011, 07:10 PM
mikej's Avatar
Diesel Fan
Join Date: Jun 2011
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 98.12.valve
I know the trannies been rebuilt i just dont know how well, when i put it in gear though the truck bumps forward slightly and when i let off the gas it does this also, i have to get up to about 1800-2000 rpms to accelerate at a decent speed.
I would take it to a good shop and have the solenoid pack scanned.But most likely its the TC if its slipping.I dont know it all but i have seen a lot of guys go the route of piecing together there trannys valve bodies ect.A month latter it breaks the money they spent is gone plus buying a new one anyway.A good valebody and TC will cost $2,300 plus labor.
 
  #8  
Old 10-03-2011, 08:35 PM
Benjamin's Avatar
Bombardier
Join Date: Mar 2007
Location: Da' Dirty South
Posts: 9,655
Received 607 Likes on 502 Posts
Default

sounds like it was rebuilt with a STOCk converter, they are the problem the trannies burn up, so that is why i wander why a tranny builder will replace a converter with stock junk....
 
  #9  
Old 10-04-2011, 08:12 PM
seandonato73's Avatar
Diesel Wrench
Join Date: Oct 2009
Location: lebanon, Pa
Posts: 603
Received 9 Likes on 9 Posts
Default

so they can do your tranny again and again and again and again..
 
  #10  
Old 10-04-2011, 08:21 PM
Benjamin's Avatar
Bombardier
Join Date: Mar 2007
Location: Da' Dirty South
Posts: 9,655
Received 607 Likes on 502 Posts
Default

Originally Posted by seandonato73
so they can do your tranny again and again and again and again..
i guess the same reason that Dodge put in the junk one to begin with....why build something that will last.... noone will want that....
 



All times are GMT -5. The time now is 04:33 AM.