kickdown
12-13-2002, 04:31 PM
#16
Gary -
Is that your car in your avatar?
I think I have seen it around San Diego. Where are you? Have you ever parked on University near the post office?
Is that your car in your avatar?
I think I have seen it around San Diego. Where are you? Have you ever parked on University near the post office?
12-13-2002, 06:10 PM
#17
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No this is just one of the standard avatars. My car does look like it. I live in La Jolla and work in Poway. It must have been another 928 that you saw near the post office. You would see me heading east on 52 and north on 15 most mornings. I drive the 928 to work most of the time. I have seen some other silver/gray 928S around San Diego though.
12-14-2002, 06:59 AM
#18
Drifting
Thread Starter
randy,
i have the jaeger tip shifter and i agree it is the way to go with an auto, but like others here, cant downshift into 1st without kerb crawling!
could be that a valve body mod is the solution, i dont know but it seems theres no simple fix.
john,
at the minute im in north wales, wrexham. im locuming and as such dont have a fixed abode, just a po box and some storage space somewhere in sheffield!
i have the jaeger tip shifter and i agree it is the way to go with an auto, but like others here, cant downshift into 1st without kerb crawling!
could be that a valve body mod is the solution, i dont know but it seems theres no simple fix.
john,
at the minute im in north wales, wrexham. im locuming and as such dont have a fixed abode, just a po box and some storage space somewhere in sheffield!
12-14-2002, 09:49 AM
#19
Burning Brakes
Back when I owned a 86.5 AT I was able to get the car to start from 1st gear and hold it a bit longer than factory setting by taking out most (but not all) of the slack in the transmission linkage. However, I could not get it to go back to 1st unless I slowed down to less than 10 MPH. 
Once I installed the parellel kick-down switch (PKS) it would start in first and hold it to 5500 RPM. Also, it would downshift to the next lowest gear if the rev-limiter allowed it, even from 2nd to 1st.
The new owners already had one 86.5S AT and wanted a second for the better half. As they test drove my AT they both said it was better than theirs, and they loved that they could control the shifting with the PKS. YMMV.
Once I installed the parellel kick-down switch (PKS) it would start in first and hold it to 5500 RPM. Also, it would downshift to the next lowest gear if the rev-limiter allowed it, even from 2nd to 1st.
The new owners already had one 86.5S AT and wanted a second for the better half. As they test drove my AT they both said it was better than theirs, and they loved that they could control the shifting with the PKS. YMMV.
12-14-2002, 04:50 PM
#20
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Hi Nick,
Welcome to the UK !
Didn't have the time to check my 2 to 1 downshift today, when I took the car out. Your query has made me interested to find out !
Have you tried the 928GB list at Yahoo groups ?
It's very active, with a great bunch of people !
John
Welcome to the UK !
Didn't have the time to check my 2 to 1 downshift today, when I took the car out. Your query has made me interested to find out !
Have you tried the 928GB list at Yahoo groups ?
It's very active, with a great bunch of people !
John
12-14-2002, 06:11 PM
#21
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[quote]Originally posted by John Speake:
<strong>Have you tried the 928GB list at Yahoo groups ?
It's very active, with a great bunch of people !
John</strong><hr></blockquote>
So what's that make us here John - chopped liver <img src="graemlins/roflmao.gif" border="0" alt="[hiha]" /> ?
<strong>Have you tried the 928GB list at Yahoo groups ?
It's very active, with a great bunch of people !
John</strong><hr></blockquote>
So what's that make us here John - chopped liver <img src="graemlins/roflmao.gif" border="0" alt="[hiha]" /> ?
12-15-2002, 08:32 AM
#22
Rennlist Member
>> So what's that make us here John - chopped liver ?
Sorry Randy, my humour detector was baffled by your response - must be trans-atlantic fog !
928GB organise various events in the UK, which would be easy for Nick to attend. Our last meet on 7th December had 55 928's attending.
The Rennlist guys are great too ! :-)
John
Sorry Randy, my humour detector was baffled by your response - must be trans-atlantic fog !
928GB organise various events in the UK, which would be easy for Nick to attend. Our last meet on 7th December had 55 928's attending.
The Rennlist guys are great too ! :-)
John
12-15-2002, 05:00 PM
#24
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Hey Ed, where did you locate your PKS? 
I have seen some use a switch at the hatch-release panel, but that looks like a PITA to operate. It seems to be a 2 handed effort and I don't have a third for the steering wheel.... <img src="graemlins/c.gif" border="0" alt="[ouch]" /> I had thought about some kind of shifter-mounted switch. So, what was your excution? <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
I have seen some use a switch at the hatch-release panel, but that looks like a PITA to operate. It seems to be a 2 handed effort and I don't have a third for the steering wheel.... <img src="graemlins/c.gif" border="0" alt="[ouch]" /> I had thought about some kind of shifter-mounted switch. So, what was your excution? <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
12-15-2002, 08:56 PM
#25
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The first procedure in diagnosing any driver ability problem is the basics, fluid level and condition. Verify and correct line pressure (working pressure). If working pressure is correct modulator pressure is correct.
A good way to determine if the TV cable is adjusted correctly in both the A22 and the A28 transmissions is to drive the car at light and medium throttle. If you have stacked up shifts, shifts on top of each other, the TV cable is loose. If you have late up shifts the TV is too tight. Of course there are other factors that can cause late and stack up shifts, but in most cases it the TV cable out of adjustment.
The hardest TV cable to adjust is the a22 (3 speed) if the lever on the side of the transmission is not adjusted properly no matter how many times u tried to adjust the TV cable on the throttle body the trans will never shift right. The A22 down shifts points are full throttle, second to first at 32-28 mph, kick down second to first are 48-36 mph. To adjust the A28 TV cable first adjust the gas pedal throttle cable until u get full opening of the throttle plate. On the s4 and later cars there are 2 gas throttle cables, one attaches the gas pedal to the throttle lever on the side of the intake the other form the throttle lever to the throttle body plate. Once you get full throttle opening of the throttle plate adjust the TV cable until all the slack is removed. If you still can’t get the proper downshift more then likely the valve bodies are worn and need over haul.A28 down shift points are full throttle 2nd to 1st 20MHP , kick down 30MPH
<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
A good way to determine if the TV cable is adjusted correctly in both the A22 and the A28 transmissions is to drive the car at light and medium throttle. If you have stacked up shifts, shifts on top of each other, the TV cable is loose. If you have late up shifts the TV is too tight. Of course there are other factors that can cause late and stack up shifts, but in most cases it the TV cable out of adjustment.
The hardest TV cable to adjust is the a22 (3 speed) if the lever on the side of the transmission is not adjusted properly no matter how many times u tried to adjust the TV cable on the throttle body the trans will never shift right. The A22 down shifts points are full throttle, second to first at 32-28 mph, kick down second to first are 48-36 mph. To adjust the A28 TV cable first adjust the gas pedal throttle cable until u get full opening of the throttle plate. On the s4 and later cars there are 2 gas throttle cables, one attaches the gas pedal to the throttle lever on the side of the intake the other form the throttle lever to the throttle body plate. Once you get full throttle opening of the throttle plate adjust the TV cable until all the slack is removed. If you still can’t get the proper downshift more then likely the valve bodies are worn and need over haul.A28 down shift points are full throttle 2nd to 1st 20MHP , kick down 30MPH
<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />
12-16-2002, 04:00 AM
#26
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87 s4 auto.
ref: downshifts
Mine WILL not drop to 1st from 2nd gear unless
1) at a complete stop
2) speed is below appx10-12 mph
doesnt make a diff whether you uses a PKS or not BTW.
My car has always been that way and is more of a nuisance than antyhing when i do autocrosses. I would like the tranny to down shift at a slightly higher speed as to keep the engine spooled up into and out of the turn. Being able to have it in 1st during these slow turns would shave some time im sure of it. There is a company called bergwerks (sp) that has a module for our cars. Search the archives. One of these days i will get one and try it but i have other projects going on right now with the car...and..uh...with all my future torque, i wont need 1st gear anyway
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
ref: downshifts
Mine WILL not drop to 1st from 2nd gear unless
1) at a complete stop
2) speed is below appx10-12 mph
doesnt make a diff whether you uses a PKS or not BTW.
My car has always been that way and is more of a nuisance than antyhing when i do autocrosses. I would like the tranny to down shift at a slightly higher speed as to keep the engine spooled up into and out of the turn. Being able to have it in 1st during these slow turns would shave some time im sure of it. There is a company called bergwerks (sp) that has a module for our cars. Search the archives. One of these days i will get one and try it but i have other projects going on right now with the car...and..uh...with all my future torque, i wont need 1st gear anyway
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
12-16-2002, 10:04 AM
#27
Burning Brakes
I put the PKS on the dead pedal. It was a push for on - push again for off switch.
BTW, some folks could not get their PKS to make the tranny shift down to 1st without coming to a near stop. Others (like my car) were able to do it. Perhaps it's because they took out the right amount of slack in the TV. And remember - YMMV.
BTW, some folks could not get their PKS to make the tranny shift down to 1st without coming to a near stop. Others (like my car) were able to do it. Perhaps it's because they took out the right amount of slack in the TV. And remember - YMMV.
12-16-2002, 12:14 PM
#28
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BergWerks is in Van Nuys, Ca near my home. I've visited them and we did some testing. The shift module essentially automates the downshift/upshift process by triggering the kickdown solenoid for you at predetermined speeds. The key to getting first-gear starts with the module is having a car that will start in first gear with the kickdown solenoid engaged.
To test for this, pill the two wires that attach to the switch under the pedal and use a temporary jumper to connect the two wires. Drive the car, and note if the trans starts off in first with the shift lever in drive. If it does, you are a candidate for the BergWerks module. If it doesn't you can go hunting for mechanical adjustments, and follow that with a valve body rework as described elsewhere.
The BergWerks module looks at the pulses from the speedo sensor to give you programmed shift points. Depending on the module you buy, you get to program the upshift and downshift speeds for first gear operation, and may get a "sport mode" option that looks a lot like the solenoid engaged longer or all the time.
My '89 does not offer first-gear starts with the solenoid alone; it stall takes a little bit of quick initial throttle movement to get first. Unless I can find a way to get the car to always go to first without the brisk pedal, the BergWerks module won't help me. Meanwhile, I have the TV cable snugged up so that the car is almost too aggressive at downshifting, especially the 4-3 while just cruising. A push to pass often causes a 'premature' downshift. So I won't be shortening that shift cable any more I guess.
Gary Knox has been spearheading the 928 connection for the BergWerks module, and has an installation instruction prepared for using it in the 928. He can offer more info on that module and what the successful applications have been on the 928.
Hope this helps!
<img src="graemlins/yltype.gif" border="0" alt="[typing]" />
To test for this, pill the two wires that attach to the switch under the pedal and use a temporary jumper to connect the two wires. Drive the car, and note if the trans starts off in first with the shift lever in drive. If it does, you are a candidate for the BergWerks module. If it doesn't you can go hunting for mechanical adjustments, and follow that with a valve body rework as described elsewhere.
The BergWerks module looks at the pulses from the speedo sensor to give you programmed shift points. Depending on the module you buy, you get to program the upshift and downshift speeds for first gear operation, and may get a "sport mode" option that looks a lot like the solenoid engaged longer or all the time.
My '89 does not offer first-gear starts with the solenoid alone; it stall takes a little bit of quick initial throttle movement to get first. Unless I can find a way to get the car to always go to first without the brisk pedal, the BergWerks module won't help me.
Meanwhile, I have the TV cable snugged up so that the car is almost too aggressive at downshifting, especially the 4-3 while just cruising. A push to pass often causes a 'premature' downshift. So I won't be shortening that shift cable any more I guess.Gary Knox has been spearheading the 928 connection for the BergWerks module, and has an installation instruction prepared for using it in the 928. He can offer more info on that module and what the successful applications have been on the 928.
Hope this helps!
<img src="graemlins/yltype.gif" border="0" alt="[typing]" />
12-18-2002, 04:41 PM
#29
Drifting
Thread Starter
interesting to hear of such a variation with first gear starts, i really enjoy holding first and scaring pedestrians round town!
ive just wired in my parallel kickdown switch and the car will now downchange from 2nd to 1st at slightly over 20mph, much better!
havent found anywhere permanent to locate it yet, it simply emerges from the ash tray on coils of wire...
ive just wired in my parallel kickdown switch and the car will now downchange from 2nd to 1st at slightly over 20mph, much better!
havent found anywhere permanent to locate it yet, it simply emerges from the ash tray on coils of wire...
12-18-2002, 05:00 PM
#30
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Dr Bob + others - have you tried adjusted the vacuum modulator yet?
(I believe there have been several write-ups about it)
One nice thing about my 3-speed I've found, (after adjusting the cable and VM), at low speeds it will kick down two gears if pushed, and fly. (eg. freeway on-ramps)
(I believe there have been several write-ups about it)
One nice thing about my 3-speed I've found, (after adjusting the cable and VM), at low speeds it will kick down two gears if pushed, and fly. (eg. freeway on-ramps)