Our 88 with 300K km on it still has the original hose setup and it still
works well.

The dealer does sell a kit with all new lines for a decently cheap price
I have heard.

I can speak for the Cherokee, but on my CJ7 my mileage drops a fair bit
with the front axles engaged.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Steve wrote:
>
> Hi,
>
> I have a '90 XJ with the vacuum actuated axle engagement in the front
> end. The previous owner had welded the fork so that the collar was
> permanently locked on the axles. The weld recently broke and now I have
> no front drive.
>
> My first inclination was to simply weld it up again, but after driving
> disengaged, I've noticed less highway noise and I got to wondering if
> having it permanently locked might increase wear and fuel consumption.
>
> Any opinions on this?
>
> I know that the somewhat pricey manual Posi-lock shifter would be the
> ideal solution, but I have a long list of other upgrades I'd rather
> spend on first. Has anyone out there rigged a cheaper home made
> alternative to the Posi-lock?
>
> For relatively little cost, I could replace the hoses and harness to
> restore the vacuum actuation, but the system is known to be failure
> prone. So, can I expect reasonably reliable operation with new hoses and
> careful installation, or should I just weld it and forget it?
>
> Thanks,
>
> Steve

 

Our 88 with 300K km on it still has the original hose setup and it still
works well.

The dealer does sell a kit with all new lines for a decently cheap price
I have heard.

I can speak for the Cherokee, but on my CJ7 my mileage drops a fair bit
with the front axles engaged.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Steve wrote:
>
> Hi,
>
> I have a '90 XJ with the vacuum actuated axle engagement in the front
> end. The previous owner had welded the fork so that the collar was
> permanently locked on the axles. The weld recently broke and now I have
> no front drive.
>
> My first inclination was to simply weld it up again, but after driving
> disengaged, I've noticed less highway noise and I got to wondering if
> having it permanently locked might increase wear and fuel consumption.
>
> Any opinions on this?
>
> I know that the somewhat pricey manual Posi-lock shifter would be the
> ideal solution, but I have a long list of other upgrades I'd rather
> spend on first. Has anyone out there rigged a cheaper home made
> alternative to the Posi-lock?
>
> For relatively little cost, I could replace the hoses and harness to
> restore the vacuum actuation, but the system is known to be failure
> prone. So, can I expect reasonably reliable operation with new hoses and
> careful installation, or should I just weld it and forget it?
>
> Thanks,
>
> Steve

 

Our 88 with 300K km on it still has the original hose setup and it still
works well.

The dealer does sell a kit with all new lines for a decently cheap price
I have heard.

I can speak for the Cherokee, but on my CJ7 my mileage drops a fair bit
with the front axles engaged.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Steve wrote:
>
> Hi,
>
> I have a '90 XJ with the vacuum actuated axle engagement in the front
> end. The previous owner had welded the fork so that the collar was
> permanently locked on the axles. The weld recently broke and now I have
> no front drive.
>
> My first inclination was to simply weld it up again, but after driving
> disengaged, I've noticed less highway noise and I got to wondering if
> having it permanently locked might increase wear and fuel consumption.
>
> Any opinions on this?
>
> I know that the somewhat pricey manual Posi-lock shifter would be the
> ideal solution, but I have a long list of other upgrades I'd rather
> spend on first. Has anyone out there rigged a cheaper home made
> alternative to the Posi-lock?
>
> For relatively little cost, I could replace the hoses and harness to
> restore the vacuum actuation, but the system is known to be failure
> prone. So, can I expect reasonably reliable operation with new hoses and
> careful installation, or should I just weld it and forget it?
>
> Thanks,
>
> Steve