7AT: Heavy Resistance going From P to R

ZeeYouLater · 06-17-2011, 02:45 PM

In this forum there are a lot of people with mechanical knowlege: like texas viking

To get rid of this clunky operation park the car always with this procedure:

Drive -> Park instruction
1. stop the car
2. pull the handbrake that it is locked well (do it not like a girl)
3. switch to neutral "N"
4. switch fast to park mode "P" (no time to power rear again)
5. ignition off

This is the only way to do but anyway:
Park -> Drive instruction
1. start the engine.
2. switch from "P" to "D" or "R"
3. open the handbrake
4. bye bye

The problem occurs if you pull the handbrake in "D" or "R" then the drive shaft is under torque and a litle metal bolt locks the "gears" in "P" too fast. But there is a little loose in the drive-shaft to the rear diff. So if the engine is off you have a "negative" torque on the bolt....clunk ...frrom "P" to anything else in the gear box if you want to go away. Suspension and normal brakeing store also energy (low pitch angle). Switch to "P" and this energie comes back to the drivetrain if you open the normal brake padel. I think its more the last one then the loose in the drive shaft

Normaly this have all AT gearboxes on the descant ..the Z has this because the lock bolt is not electronic driven, i think its mechanical driven by the button.. May you have to hold the button longer in "P" but i didnt try this because of the ugly mechanical noise

_ P
_ R
+_N
M_D
-

hope this was helpfull for the AT drivers.. and along life for this amazing gearbox

P.S: For the winter snow drivers this handbrake operation is bad if you dont move the care for some months and there is some salt with water in the handbrake drums before ..they will maybe lock for ever.. so store the car only on a flat surface and open the handbrake ! Or heat it up before stop by pulling the handbrake in winter times a littel bit.

daisuke149 · 06-17-2011, 04:16 PM

yup happens on all auto cars normally if you throw it into park immediately after you stop and dont use the hand break (on a sloped surface) shoudlnt really happen on a completely flat surface.

cwinning · 06-18-2011, 08:55 PM

Interesting. Though I haven't noticed your exact issue, I have noticed my car tries to move forward a little bit after I put it in park. I bet it's related. I'm going to try the recommendation ZeeYouLater recommends and see if that helps. Good Luck!

cc370z · 06-19-2011, 12:04 PM

Had that same issue and the dealer replaced it under warranty at 10,000 miles and now at 34,000 this one is starting to act up again.

06-17-2011, 02:45 PM	#16 (permalink)
ZeeYouLater Base Member Join Date: Dec 2009 Location: Swiss Posts: 39 Drives: 370z Roadster Rep Power: 16	In this forum there are a lot of people with mechanical knowlege: like texas viking To get rid of this clunky operation park the car always with this procedure: Drive -> Park instruction 1. stop the car 2. pull the handbrake that it is locked well (do it not like a girl) 3. switch to neutral "N" 4. switch fast to park mode "P" (no time to power rear again) 5. ignition off This is the only way to do but anyway: Park -> Drive instruction 1. start the engine. 2. switch from "P" to "D" or "R" 3. open the handbrake 4. bye bye The problem occurs if you pull the handbrake in "D" or "R" then the drive shaft is under torque and a litle metal bolt locks the "gears" in "P" too fast. But there is a little loose in the drive-shaft to the rear diff. So if the engine is off you have a "negative" torque on the bolt....clunk ...frrom "P" to anything else in the gear box if you want to go away. Suspension and normal brakeing store also energy (low pitch angle). Switch to "P" and this energie comes back to the drivetrain if you open the normal brake padel. I think its more the last one then the loose in the drive shaft Normaly this have all AT gearboxes on the descant ..the Z has this because the lock bolt is not electronic driven, i think its mechanical driven by the button.. May you have to hold the button longer in "P" but i didnt try this because of the ugly mechanical noise _ P _ R +_N M_D - hope this was helpfull for the AT drivers.. and along life for this amazing gearbox P.S: For the winter snow drivers this handbrake operation is bad if you dont move the care for some months and there is some salt with water in the handbrake drums before ..they will maybe lock for ever.. so store the car only on a flat surface and open the handbrake ! Or heat it up before stop by pulling the handbrake in winter times a littel bit. __________________ ___________________________ 7AT. NAVI. 19". (Sport and Touring Package) Last edited by ZeeYouLater; 06-27-2011 at 01:07 PM.

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06-17-2011, 04:16 PM	#17 (permalink)
daisuke149 My *** is famous! Join Date: Mar 2010 Location: Alpharetta, GA Posts: 4,849 Drives: 2013 Boss 302 PW Rep Power: 31	yup happens on all auto cars normally if you throw it into park immediately after you stop and dont use the hand break (on a sloped surface) shoudlnt really happen on a completely flat surface.

06-18-2011, 08:55 PM	#18 (permalink)
cwinning Base Member Join Date: May 2011 Location: West Hills Posts: 12 Drives: 2010 370Z Touring A7 Rep Power: 14	Interesting. Though I haven't noticed your exact issue, I have noticed my car tries to move forward a little bit after I put it in park. I bet it's related. I'm going to try the recommendation ZeeYouLater recommends and see if that helps. Good Luck!

06-19-2011, 12:04 PM	#19 (permalink)
cc370z Enthusiast Member Join Date: Jan 2010 Location: AZ Posts: 467 Drives: 09 370z Rep Power: 15	Had that same issue and the dealer replaced it under warranty at 10,000 miles and now at 34,000 this one is starting to act up again.