Thread: Puma locker issues

Try driving with the EGR disconnected, I've found the EGR causes a the engine to "hesitate" alot, this makes it feel like there is much more slop in the drivetrain than there actually is.

Hope this helps,

Tim

Originally Posted by TimNZ

Try driving with the EGR disconnected, I've found the EGR causes a the engine to "hesitate" alot, this makes it feel like there is much more slop in the drivetrain than there actually is.

Hope this helps,

Tim

Tim, i mentioned this to the owner; he has a BAS remap with EGR disabled.

JC

Perhaps setting the correct tyre size in the instrument pack may help then, otherwise..... different type of locker?

Edit: Or if it is a pre 2010 TDCi there could be a problem with the clutch anti rattle springs.

Originally Posted by TimNZ

Perhaps setting the correct tyre size in the instrument pack may help then, otherwise..... different type of locker?

Edit: Or if it is a pre 2010 TDCi there could be a problem with the clutch anti rattle springs.

It has had a clutch, the 'shunting' is purely drivetrain, it is normal behaviour for a detroit, mine does it but i have to make it happen. This is caused by, in my opinion, the engine/ trans relationship that the puma has.

jc

(edit; no clutch was replaced, got confused with other vehicle. clutch death rattle not evident anyway, jc.)

JC, just an observation on my 130 Tdci. From new it made a lot of clunking in the drive chain. Turns out it had a buggered gear box mount, and after that was fixed while replacing the clutch, my system is almost silent. Could it be possible with what your looking at.

Hi Jason,

Yes, I have checked all the mounts etc but I too have had a Puma with serious clunking/ backlash in the past and when the clutch was replaced under warranty the clunking lessened by about 50%!, however the rattling clutch / puma death rattle was the reason the clutch was replaced; this vehicle has no symptoms in that department, a bit reluctant to change out a perfectly functional clutch at present.


There is a fair amount of initial backlash inherent in the design of the detroit locker centre, it is avoidable in most vehicles by 'softer' clutch/throttle engagement IE like trying to drive a Defender with worn axles and A- frame ball joint, BUT the Pumas' fly by wire throttle and antistall I THINK is where the symptoms get really noticeable.


These are just observations on this particular vehicle, My detroit equipped 110 Isuzu can be made to do similar, BUT I have to try to do it, this one is the opposite - you have to try NOT to do it

JC

Justin
Would it not be possible to mount a small camera(like a Go Pro)or similar,under the vehicle,and then drive the vehicle carefully for a short period,and then view the footage.This might indicate if the backlash in the Detroit fitted Salisbury is excessive and causing problems.I know what you mean about having to induce the clunk in a normal Defender,as I find that with my Defender I just about have to drop the clutch whilst rocking the vehicle to induce the clunk from the Detroit .Just another quick thought,any wear in the splines in the tailshaft exacerbates the clunkiness in a normal Defender and is normally multiplied when larger wheels are fitted,the effect could be multiplied again by the abruptness of the fly by wire action of the Puma?

Justin
I have a Detroit in my Stage 1, even with the V8 I can get the issue you are talking about.
I can only imagine how bad it could be on something like a Puma as my TD5 can get this without a Detroit.
On the subject of Backlash I fund that when I fitted my Ashcroft ATB in the front my backlash became almost zero.