00 XJR/XJ8 shocks the same?
#2
01-31-2018, 03:35 AM
Veteran Member
Nope , the XJR's are stiffer . Do you have 2 wires coming out of the top of the shock ?
See page 16 in below PDF :
The lower attach bushing gets worn out and Motorcarman ( Bob ) suggested only use original Jaguar parts for this item as others wear out very fast . Not in the shock kit box . Item # 6 below :
https://www.jaguarclassicparts.com/u...d-damper-front
and posably item # 12 or 20 below :
https://www.jaguarclassicparts.com/u...-fittings-rear
Upper mount bushings ? New bolts ?
Someone will come along that knows more the me .
Last edited by Lady Penelope; 01-31-2018 at 03:54 AM.
#4
01-31-2018, 07:30 AM
Junior Member
Join Date: Feb 2010
Location: London
Posts: 27
Likes: 0
Received 0 Likes
on
0 Posts
The XJR uses electronic sports suspension Adaptive control
https://www.britishparts.co.uk/jagua...er-front-p5753
https://www.britishparts.co.uk/jagua...er-front-p5753
#5
01-31-2018, 09:42 AM
I guess I have the comfort suspension as there are no wires coming out of the shocks (is this how you tell?). The shocks are starting to wear out on the rear the car continues to bounce more than it should when I go over bumps.
I have also bounced the rear of the car myself when its parked and it goes up and down for a couple of seconds.
I have also bounced the rear of the car myself when its parked and it goes up and down for a couple of seconds.
Last edited by cdc; 01-31-2018 at 09:49 AM.
#6
01-31-2018, 10:59 AM
Veteran Member
XJR's use sport shocks, XJ8's use comfort. non-CATS cars are the same way, if it's an earlier XJR like mine it won't have wires coming out of it but will still use sport shocks.
You will need the XJR shocks. the XJ8 ones will fit but have different damping. You need damper MNC3540CA should be green colored.
You will need the XJR shocks. the XJ8 ones will fit but have different damping. You need damper MNC3540CA should be green colored.
#7
01-31-2018, 11:09 AM
Trending Topics
#8
01-31-2018, 01:05 PM
Veteran Member
#9
01-31-2018, 03:47 PM
#11
01-31-2018, 09:32 PM
Veteran Member
#12
01-31-2018, 10:14 PM
Senior Member
?? Question ??
Scotlad:
I thought the CATS system controls the shock dampening from a computer module, so differences in dampening would be due to a different program?
I understand the non-CATS (traditional) shocks are available in different performance modes.
So the CATS shocks are not only controlled by the ride module, but have different built-in ride characteristics?
I thought the CATS system controls the shock dampening from a computer module, so differences in dampening would be due to a different program?
I understand the non-CATS (traditional) shocks are available in different performance modes.
So the CATS shocks are not only controlled by the ride module, but have different built-in ride characteristics?
#13
01-31-2018, 11:12 PM
Veteran Member
I'm not sure if CATS controls the shocks with a smooth variance or if it's just switching a solenoid open/shut, but if it's the latter, the damping characteristics of those modes may be different between the comfort and sport CATS shocks. So comfort shock open mode is softer than sport shock open mode etc.
#16
02-01-2018, 07:35 AM
Senior Member
I thought the CATS systems stiffens the shocks with the speed of the car to keep the same comfort level and stops the car floating at high speed
Here's an extract from the repair manual concerning the adaptive damping principle:
Code:
The adaptive dampers: - Are installed in place of the normal dampers. - Can be identified by the cable and connector at the top of the unit. - Have two settings; firm and soft. - Require no adjustment and are non-serviceable items. The three accelerometers: - Sense vehicle body movement. - Generate an analogue voltage (maximum +5 volts) proportional to body movement. - Provide inputs to the adaptive damping control module. The two vertical accelerometers are mounted on the bulkhead and in the trunk. The lateral accelerometer is mounted in the ECM housing. Operation The system selects the soft or firm damper setting according to the current road and driving conditions, to optimise vehicle ride and handling. With the vehicle stationary, the dampers are in the firm setting, but will normally switch to the soft setting when the vehicle exceeds 8 km/h (5 mile/h); all dampers are switched simultaneously. Sudden movement of the vehicle body, in response to road inputs, is detected by the vertical accelerometers, and the ADCM switches the dampers to the firm setting to give improved damping of the resultant oscillations. When cornering forces are detected by the lateral accelerometer, the ADCM switches the dampers to the firm setting to reduce the roll rate and improve wheel control. After the event has passed, the dampers revert to the soft setting. When the footbrake is applied, the ADCM receives a signal and calculates the rate of vehicle deceleration. If the deceleration rate is greater than a certain threshold, the dampers are switched to the firm setting to reduce the pitch rate and improve wheel control. If a system failure occurs, the ADCM grounds the output line to the instrument cluster message center, which displays a text warning SUSPENSION FAULT and illuminates the amber warning lamp. Under fault conditions the system always fails to the firm setting, so that the vehicle will be safe to drive under all road and driving conditions.
I guess I have the comfort suspension as there are no wires coming out of the shocks (is this how you tell?). The shocks are starting to wear out on the rear the car continues to bounce more than it should when I go over bumps.
I believe it is a straight on/off situation but I find it hard to determine any difference if I am honest.
Just disconnect one of your front shocks and take it to a drive - you'll know what I mean ;-)
The following users liked this post:
smith356 (02-11-2018)
#17
02-01-2018, 09:37 AM
Veteran Member
Look to see if you have the 2 wires on top of the fwd shocks and if not this would eliminate the CAT confusion . Doesn't mean the previous owner did not put the correct shocks on if they were replaced . To know if you originally had CATS there is a air compressor fwd of the left tire under the car .
#18
02-01-2018, 11:23 AM
Look to see if you have the 2 wires on top of the fwd shocks and if not this would eliminate the CAT confusion . Doesn't mean the previous owner did not put the correct shocks on if they were replaced . To know if you originally had CATS there is a air compressor fwd of the left tire under the car .
#20
02-06-2018, 01:21 AM
Most report not liking the KYB's. Very harsh ...I don't believe any of the 2000's have CATS.
CATS is a stand alone add on system .. control module .. couple of sensors and the shocks. My memory was that some of the 01 R's had it ....all the 02's did ..... Believe the XK had it first -- year earlier. It's easy to tell -- the CATS shock will have a harness going to them -- check the fronts .. wire going to dust cap.
At one time you could have them rebuilt. Since the basic suspension is all the same -- the various shocks in the range will fit across all the models. The CATS was to soften the harsh ride complaints in normal driving .. the straight sport can be harsh at moderate speed on bad roads.
CATS is a stand alone add on system .. control module .. couple of sensors and the shocks. My memory was that some of the 01 R's had it ....all the 02's did ..... Believe the XK had it first -- year earlier. It's easy to tell -- the CATS shock will have a harness going to them -- check the fronts .. wire going to dust cap.
At one time you could have them rebuilt. Since the basic suspension is all the same -- the various shocks in the range will fit across all the models. The CATS was to soften the harsh ride complaints in normal driving .. the straight sport can be harsh at moderate speed on bad roads.