I have a 90 XJ6 in which self-leveling suspension has been replaced with conventional shocks. Rack and pinion keeps leaking and needs to be replaced. Can I flush HSMO and replace with cheaper, more readily available fluid? If so, what is recommended?

I replaced rack and pinion unit once without flushing old HSMO. New unit promptly blew HSMO past seals in new unit, filling both boots. Before I replace unit again, I'll definitely flush system, but would prefer using something cheaper than HSMO.

I also wonder if remanufactured rack and pinion units have seals that are somehow incompatible with HSMO? Or was grit in old HSMO the culprit in leaking?

Thanks!

 

The steering used DEXRON from 1988-1989 and then again 1993-1994.
The 1990-1992 shared the HMSO with the suspension so if the SLS is deleted and the pump removed from the front of the engine, you can use DEXRON like all the rest of the cars.

bob

 

Thanks, Bob - greatly appreciated. After posting my original question I came across an answer you posted in 2015:

This leads to a few follow-up questions: (1) By valve blocks, I assume you're referring to the valve blocks near the SLS shocks? (2) Does anyone have part number, specs, or other sourcing info for the appropriate hydraulic hose to replace the y-hose and/or info on the blanking plate. I've got a coffee can ready, but I thought I'd ask.

Thanks again!

 

Worked on the car today based on your sage tips (thanks again, Motorcarman) ... one thing led to another ... and the pump, plumbing, and obviously now useless valve block are all gone. Just need a length of hydraulic hose, a couple clamps, and a coffee can. Then I can replace the steering gear box while (whilst) kissing the HSMO goodbye forever.

I'm assuming the wire harness that fed the valve block just needs to be short-proofed (unless someone tells me otherwise).

I'm really digging this forum. Thanks to any who offer advice and thanks to the moderators, administrators, etc... who keep it running. Hope I can pay it forward soon.