12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

Higher GSK needed??

Thread Tools
 
Search this Thread
 
Old 04-29-2007, 02:15 AM
  #1  
Registered User
Thread Starter
 
Mslaughter's Avatar
 
Join Date: Apr 2004
Posts: 146
Likes: 0
Received 0 Likes on 0 Posts
Higher GSK needed??

Here's my problem, at WOT the 2nd-3rd shift and 3rd-OD shift is delayed. It'll wind out as high as it'll go (maybe 2500-2700rpms) and sit there, defuel from 35lbs of boost to 20lbs or so then shift. It seems as if the motor hits a goverend spot and sits there for maybe 2 seconds then shifts which is what makes me think it's GSK related. The truck sort of sounds like I'm driving a 5 speed from outside because of the time delay between shifts. Tranny has less than 500 miles on it and I adjusted the kickdown cable when I installed it. I also put on a new tps and set it around 0.8 if I remember right. Does it sound like my stock GSK isn't allowing the motor to rev high enough to reach a certain shift point? It did this with the old tranny too but it was worse, like 5 second delays between shifts. I just want quick bangbang shifts through the gears, not ..........bang..........bang like what it's doing now. Thanks everyone
Old 04-29-2007, 02:20 AM
  #2  
Registered User
Thread Starter
 
Mslaughter's Avatar
 
Join Date: Apr 2004
Posts: 146
Likes: 0
Received 0 Likes on 0 Posts
I haven't checked but are the shifts based on speed? Maybe the motor defuels before the certain mph is reached needed for the shift and that's causing the delay? If that's the case the GSK would fix the problem right?
Old 04-29-2007, 04:55 AM
  #3  
Registered User
 
XLR8R's Avatar
 
Join Date: Nov 2005
Location: Pattonville, Texas
Posts: 7,785
Likes: 0
Received 2 Likes on 2 Posts
Are you sure you adjusted the cable properly?

When I put the built tranny in the '98, I had to adjust the cable several times until it would allow the engine to wind up to redline at WOT without hanging there.... had to give up a couple of hundred RPM to get a reliable shift point every time.
Old 04-29-2007, 06:42 AM
  #4  
Registered User
 
Andy505's Avatar
 
Join Date: Sep 2005
Location: Bristol, Indiana
Posts: 659
Likes: 0
Received 2 Likes on 1 Post
I think a GSK would work, I've got a similar problem were I am going from 35 down to 30 lbs when I get around the 2500 to 2700 rpm range and it seems like the engine hangs there at about 2700-2800 for a second before the tranny shifts, I am gonna install a 4000 GSK here in a week or so and see what happens. It should allow the engine to pull harder at higher rpms without loosing any power.
Old 04-29-2007, 08:44 AM
  #5  
Registered User
 
ratsun's Avatar
 
Join Date: Jan 2004
Location: Wet Coast, Canada
Posts: 2,342
Likes: 0
Received 1 Like on 1 Post
Originally Posted by Mslaughter
Here's my problem, at WOT the 2nd-3rd shift and 3rd-OD shift is delayed. It'll wind out as high as it'll go (maybe 2500-2700rpms) and sit there, defuel from 35lbs of boost to 20lbs or so then shift. It seems as if the motor hits a goverend spot and sits there for maybe 2 seconds then shifts which is what makes me think it's GSK related. The truck sort of sounds like I'm driving a 5 speed from outside because of the time delay between shifts. Tranny has less than 500 miles on it and I adjusted the kickdown cable when I installed it. I also put on a new tps and set it around 0.8 if I remember right. Does it sound like my stock GSK isn't allowing the motor to rev high enough to reach a certain shift point? It did this with the old tranny too but it was worse, like 5 second delays between shifts. I just want quick bangbang shifts through the gears, not ..........bang..........bang like what it's doing now. Thanks everyone
So you don't have a GSK kit of any kind now? IMO that is one the best mods you can do to a 12v.
Yes it will help radically and allow your fueling right up to and past the shift point with the 100 plate.
Also your TPS should be set at 1.4-1.5v
Old 04-29-2007, 09:42 AM
  #6  
Registered User
 
TxDiesel007's Avatar
 
Join Date: Dec 2004
Location: Laredo
Posts: 3,411
Likes: 0
Received 1 Like on 1 Post
What Ratsun said is correct

its night and day between the stock Governer springs and the 3 or 4 K GSK. I will say this tho, the 4k can be a bit touchy if not adjusted properly, but it will really wake ur truck up once u get it in. Also that smaller pump might be defueling much quicker, IE it dont fuel as hard as a larger pump, and as a result that is hurting you...

Rick
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
SHARPMACHINE
Performance and Accessories 2nd gen only
7
03-06-2007 08:45 AM
plow
Performance and Accessories 2nd gen only
6
08-09-2005 04:25 PM
MR HYDROSEED
Performance and Accessories 2nd gen only
6
03-09-2005 10:49 PM
jerry007
General Diesel Discussion
82
10-28-2004 08:24 AM
Got Smoke?
Performance and Accessories 2nd gen only
7
10-26-2004 03:57 PM



Quick Reply: Higher GSK needed??



All times are GMT -5. The time now is 03:00 PM.