700R4 acts strange
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
700R4 acts strange
It's a Pete K trans so it should be a problem free trans. I'm noticing some problems. I asked to Pete, but he is very busy with work.
I Said to Pete to think to his family first than my trans.
Pete is a friend for me. He made also the best engine I ever had.
I'm trying to understand these problems: (probably someone had the same kind of problem.)
The trans has TransGo shift kit on it.
-Situation: 70 mph freeway, selector lever in OD.
I lift the gas pedal, I move the selector lever from OD to D.
It not backshift from 4 to 3. It stays in 4.
This happens for all speed over 53 mph.
If i apply a small amount of gas pedal (say 10%) it start to gain speed in 4th gear (even if the selector lever is in D)
-It has an hesitation shifting from 2 to 3.
During the shift, it seems that it stay in 2 and when it shift in 3rd , it feels like if it is braking. It's like I have for a while both the gears applied
This happens on part throttle and lately I discovered that it happens also at WOT.
-I'm not able to shift manually the gears. It shifts, yes, but if I try to shift at WOT at over 5500 rpm , the shift is very late (too much time to exit from the gear and enter in the next gear).
-Beppe-
I Said to Pete to think to his family first than my trans.
Pete is a friend for me. He made also the best engine I ever had.
I'm trying to understand these problems: (probably someone had the same kind of problem.)
The trans has TransGo shift kit on it.
-Situation: 70 mph freeway, selector lever in OD.
I lift the gas pedal, I move the selector lever from OD to D.
It not backshift from 4 to 3. It stays in 4.
This happens for all speed over 53 mph.
If i apply a small amount of gas pedal (say 10%) it start to gain speed in 4th gear (even if the selector lever is in D)
-It has an hesitation shifting from 2 to 3.
During the shift, it seems that it stay in 2 and when it shift in 3rd , it feels like if it is braking. It's like I have for a while both the gears applied
This happens on part throttle and lately I discovered that it happens also at WOT.-I'm not able to shift manually the gears. It shifts, yes, but if I try to shift at WOT at over 5500 rpm , the shift is very late (too much time to exit from the gear and enter in the next gear).
-Beppe-
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
I have to add that ALL others operations are fine (no slipping) and all gears are engaged from 1 to 2 to 3 to 4 and from 4 to 3 to 2 to 1.
It downshifts good doing WOT.
The torque converter locks good and it's a 9.5 unit (3000 stall ).
What I need, is something to start to check.
-Beppe-
It downshifts good doing WOT.
The torque converter locks good and it's a 9.5 unit (3000 stall ).
What I need, is something to start to check.
-Beppe-
Instructor
Joined: May 2008
Posts: 234
Likes: 1
From: Midland Texas
It is got to be in the valve body some of those shift kits can be tricky to install where I would start is to drop the VB and check for missing or misplaced check ***** and then get the directions from the shift kit and check each spring and make sure that nothing was misplaced (there might be more that one way to install the kit some will have different stages you can install on what you want out of you tranny), just don't wait to long because the springs in the kit are colored and the dye the the transmission fluid can change or remove the spring color and that is the only way you can indemnify them and while you have the vb check for a stuck or a sticky valve Good luck
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
I found this definition for the 2 to 3 shift:
" It doesn’t slip or anything but it takes for ever. At the top of second gear you can feel it stop pulling for probably close to a second while it shifts before it sorta enters 3rd, it’s just very slow, not crisp feeling at all. The car actually noses down during the shift, badly enough that I had another driver in the other lane ask me about it, thinking that for some reason I tapped my brakes and my brake lights didn’t come on. "
At part throttle the 2-3 problem is VERY noticeable when the car is cold or during the first times the car performs the 2 to 3 shift.
After 3 or 4 times (and the car is warmed) the 2-3 problem continue to occurs but not so noticeable.
-Beppe-
" It doesn’t slip or anything but it takes for ever. At the top of second gear you can feel it stop pulling for probably close to a second while it shifts before it sorta enters 3rd, it’s just very slow, not crisp feeling at all. The car actually noses down during the shift, badly enough that I had another driver in the other lane ask me about it, thinking that for some reason I tapped my brakes and my brake lights didn’t come on. "
At part throttle the 2-3 problem is VERY noticeable when the car is cold or during the first times the car performs the 2 to 3 shift.
After 3 or 4 times (and the car is warmed) the 2-3 problem continue to occurs but not so noticeable.
-Beppe-
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
I have played with my tv cable and I will say that it is out of adjust ment read on how people reset it! 2 different ways to do the same thing. I did the push in the black tab then push the needle all the way in and then hold the button still while you flip the throttle all the way open on the throttle body it will pull out the needle to where it needs to be. they say not to do much else adjusting but but you can set it whaer you want it I guess! I am sure PETE K knows the most and the best
Race Director
Joined: Jun 2004
Posts: 13,961
Likes: 707
From: WI
I have played with my tv cable and I will say that it is out of adjust ment read on how people reset it! 2 different ways to do the same thing. I did the push in the black tab then push the needle all the way in and then hold the button still while you flip the throttle all the way open on the throttle body it will pull out the needle to where it needs to be. they say not to do much else adjusting but but you can set it whaer you want it I guess! I am sure PETE K knows the most and the best
Team Owner
Joined: Dec 2007
Posts: 20,974
Likes: 261
YUP, I am working with that now also! my pedal was not opening it all the way in the begining!
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Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
It's not a Tv cable issue. It's set correctly. For sure.
Probably removing the Valve body and the seperator plate, I can be able to correct the 2 to 3 issue.
What I really have no clue is the 4 to 3 manual downshift problem.
It's quite starnge moving the lever from OD to D and having the trans always in 4.
-Beppe-
Probably removing the Valve body and the seperator plate, I can be able to correct the 2 to 3 issue.
What I really have no clue is the 4 to 3 manual downshift problem.
It's quite starnge moving the lever from OD to D and having the trans always in 4.
-Beppe-
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
Beppe, if you remeber, I had similar problem on downshifting 2-1 that
you have on upshift 2-3. It felt like I pressed brakes.
I really don't know what that was, it just went away after ~ 1000km.
If I were in your shoes, I would first try to do everything that can be done
without taking the trans off. Take off pan, remove valve body
(be very carefull not to loose some checkballs) and check if separator
plate and both gaskets are alligned correctly.
While you're there, you can remove accumulator housing and remove
1-2 accumulator spring and piston and 3-4 accu. spring and piston
and check that that everything is clean and without any damage.
Do you have service manual?
It could be helpful if you go into this!
you have on upshift 2-3. It felt like I pressed brakes.
I really don't know what that was, it just went away after ~ 1000km.
If I were in your shoes, I would first try to do everything that can be done
without taking the trans off. Take off pan, remove valve body
(be very carefull not to loose some checkballs) and check if separator
plate and both gaskets are alligned correctly.
While you're there, you can remove accumulator housing and remove
1-2 accumulator spring and piston and 3-4 accu. spring and piston
and check that that everything is clean and without any damage.
Do you have service manual?
It could be helpful if you go into this!
Thread Starter
Melting Slicks
Joined: Jan 2002
Posts: 2,238
Likes: 4
From: Milan
Beppe, if you remeber, I had similar problem on downshifting 2-1 that
you have on upshift 2-3. It felt like I pressed brakes.
I really don't know what that was, it just went away after ~ 1000km.
If I were in your shoes, I would first try to do everything that can be done
without taking the trans off. Take off pan, remove valve body
(be very carefull not to loose some checkballs) and check if separator
plate and both gaskets are alligned correctly.
While you're there, you can remove accumulator housing and remove
1-2 accumulator spring and piston and 3-4 accu. spring and piston
and check that that everything is clean and without any damage.
Do you have service manual?
It could be helpful if you go into this!
you have on upshift 2-3. It felt like I pressed brakes.
I really don't know what that was, it just went away after ~ 1000km.
If I were in your shoes, I would first try to do everything that can be done
without taking the trans off. Take off pan, remove valve body
(be very carefull not to loose some checkballs) and check if separator
plate and both gaskets are alligned correctly.
While you're there, you can remove accumulator housing and remove
1-2 accumulator spring and piston and 3-4 accu. spring and piston
and check that that everything is clean and without any damage.
Do you have service manual?
It could be helpful if you go into this!
Are you speaking about the ATSG Transmission repair Manual ?
About the 2 to 3 shift hesitation-overlap, I studied the transgo kit instructions and the factory manual , and i discovered that the Transgo 2&3 kit wants the hole F plugged AND the hole G a bit enlarged on the separator plate (but still not as large as hole F that was plugged.).
BTW, the Transgo Junior kit wants the hole G enlarged (not so much as the 2&3 kit) and the hole F NOT plugged.
-holes F & G are in parallel with a checkball on hole F-
- 2/4 band push off (hole F)
-3/4 clutch pack applied (hole G) .
I really don't know if Pete, used both kits or only the 2&3 reprogramming one.
-Beppe-
Last edited by conv90; Sep 30, 2008 at 08:33 AM.
23, 700r4, cold, hesitation, instruction, instructions, kit, late, misadjusted, plate, reprogramming, separator, shift, transgo, tv, upshift
