P38 ABS Query

[Grumbles]

The shuttle valve problem in the P38 ABS module. I am aware that this issue afflicted the early P38s buit was the problem overcome by a factory redesign/better quality parts at any stage. Are the Bosch/Thor engined P38s of say 1999, 2000 and 2001 going to experience the same [expensive] problem?

Thanks guys.

[PaulP38a]

I am aware of the Disco II having an ABS Shuttle Valve problem, but not the P38 (not trying to be smart, there may well be a problem that I hadn't heard about).

Stuff I am aware of:


Pre-99 P38's are more likely to have cracked/broken locating washers in the Brake Modulator as they were made of plastic, and was supposedly fixed in mid-99. Russell of Range Rover Solutions does a BM Repair kit. We sell a lot of these.
I've seen a few requests lately for the P38 ABS Pressure Switch. AFAIK the ABS Pressure Switch is not available as a standalone part, and is included only with the ABS pump kit at over $1k from LR or your favourite UK suppliers.

Hope this helps, and/or please tell me more about the ABS Shuttle Valve issue.

Cheers, Paul.

[Grumbles]

Hello Paul – thanks for the explanation – that clarifies things for me very well.


It would seem that in my mind after reading many posts on ALRO that I have not only mixed up the problem between the Discos and the P38s but then also got the terminology wrong as well. My apologies for that.


Many thanks for responding.

[Hoges]

I am aware of the Disco II having an ABS Shuttle Valve problem, but not the P38 (not trying to be smart, there may well be a problem that I hadn't heard about).

Stuff I am aware of:


Pre-99 P38's are more likely to have cracked/broken locating washers in the Brake Modulator as they were made of plastic, and was supposedly fixed in mid-99. Russell of Range Rover Solutions does a BM Repair kit. We sell a lot of these.
I've seen a few requests lately for the P38 ABS Pressure Switch. AFAIK the ABS Pressure Switch is not available as a standalone part, and is included only with the ABS pump kit at over $1k from LR or your favourite UK suppliers.

Hope this helps, and/or please tell me more about the ABS Shuttle Valve issue.

Cheers, Paul.

In a couple of posts either here or on RR.net, AFAICR Russell has noted that some early examples of the Bosch/Thor series were fitted with the said plastic washers..probably running down the inventory:wasntme: and therefore needed to be upgraded accordingly... for his brilliant ABS Mod Kit, Russell B. is indeed a worthy recipient of the yet-to-be established "P38 Hall of Fame" award...now there's an idea!!;)

[RR P38]

The shuttle valve problem in the P38 ABS module. I am aware that this issue afflicted the early P38s buit was the problem overcome by a factory redesign/better quality parts at any stage. Are the Bosch/Thor engined P38s of say 1999, 2000 and 2001 going to experience the same [expensive] problem?

Thanks guys.

I wouldnt call it expensive to over come this problem.
I bought the kit for my 95 model for $100 and it took a good days work to overhaul the ABS module.
Mine had not failed but im glad i put the kit through it as my plastic spring retainers were quite brittle.
With parts, brake fluid and your own labour $150 will get the job done no problem.