I have a 88 GMC Jimmy w/ the potent 2.8L V6 :mwink:
Recently it started intermittantly not shift from 1 to 2, manual or otherwise, had to blip the throttle a couple of times to get it to shift.
I got a Transgo 700 JR kit to hopefully elleviate a sticking throttle valve.
Here's where things get different: The trans has been rebuilt, so other hands have been inside this. It has a 82-86 valve body and does not have the external accumulator. No problem, just follow the directions to a T.
I have the 554 2nd gear piston, so I used the orange spring in the valve body, turned the one accumulator piston upside down, had a .471" throttle valve so I used the pink spring, etc etc. The only thing I wasn't really sure about is the instructions say absolutely nothing about the big check ball above the throttle valve, why is that? They show the location of all the other checkballs..
Now it will not shift unless I run the poor engine out to redline. I have all gears, reverse, drive, even goes into lockup after it hits fourth.
The only thing I can think of is I screwed up the TV bore trying to remove the inner bushing from the valve body OR I stretched the TV cable or whatever connects the tv cable to the transmission linkage.
Could I be getting low line pressure due to the cable? I had to re-use the spring that came out of the valvebody because it was bigger than the transgo supplied one, I had a #94 on the tv plunger so I used the supplied new valve and put the little brown spring inside the snout and the tapered spring over the snout, I also installed the little metal shim inside the tv spring.
I do not have access to a line pressure gauge and my wife is slowly plotting ways to kill me since we have to car pool, so any and all help would be gladly welcome. I'm just about to drive it like I stole it to a REAL transmission shop and leave it, I'm seriously worried about my skills. I have all kinds of 4L60-E manuals, but not one 700r4.
Thank you in advance,
Jeff
Recently it started intermittantly not shift from 1 to 2, manual or otherwise, had to blip the throttle a couple of times to get it to shift.
I got a Transgo 700 JR kit to hopefully elleviate a sticking throttle valve.
Here's where things get different: The trans has been rebuilt, so other hands have been inside this. It has a 82-86 valve body and does not have the external accumulator. No problem, just follow the directions to a T.
I have the 554 2nd gear piston, so I used the orange spring in the valve body, turned the one accumulator piston upside down, had a .471" throttle valve so I used the pink spring, etc etc. The only thing I wasn't really sure about is the instructions say absolutely nothing about the big check ball above the throttle valve, why is that? They show the location of all the other checkballs..
Now it will not shift unless I run the poor engine out to redline. I have all gears, reverse, drive, even goes into lockup after it hits fourth.
The only thing I can think of is I screwed up the TV bore trying to remove the inner bushing from the valve body OR I stretched the TV cable or whatever connects the tv cable to the transmission linkage.
Could I be getting low line pressure due to the cable? I had to re-use the spring that came out of the valvebody because it was bigger than the transgo supplied one, I had a #94 on the tv plunger so I used the supplied new valve and put the little brown spring inside the snout and the tapered spring over the snout, I also installed the little metal shim inside the tv spring.
I do not have access to a line pressure gauge and my wife is slowly plotting ways to kill me since we have to car pool, so any and all help would be gladly welcome. I'm just about to drive it like I stole it to a REAL transmission shop and leave it, I'm seriously worried about my skills. I have all kinds of 4L60-E manuals, but not one 700r4.
Thank you in advance,
Jeff