E36 Rack Swap - Which Fluid to use?

[AlpinWeissDZ]

Essentially I swapped a late model E36 rack into my E30 and I’m unsure of which fluid to fill the PS system with. The rack calls for Pentosin Power Steering Fluid, however the pump calls for ATF. Which fluid should I use to reduce the chance of damaging anything?

[roguetoaster]

Most leaks occur at the rack seals, and the pump can certainly work with out of spec fluids. So, in this case I'd give the PSF a try, but in all likelihood either fluid will work, and seal leaks or foaming/performance issues will be a roll of the dice depending on condition/what was run before in each.

[bradmer]

Use the red fluid, ATF. It is what I have used on our e30's with or without swapped racks. Try Google search (in my kind voice) using - r3v / power steering fluid
and there are lots of threads in here.
Aloha


https://www.r3vlimited.com/board/for...steering-fluid


Swap out the steering pump reservoir if it's original, there's a filter on the bottom of that thing that could be 35 years old. It's cheap and easy to do at the time of swap.

[E30Bastard]

Red Atf for steering racks is what I got from this forum. I have a z3 rack running red atf for a year now with no issues but don't take my word for it. Research and quantify.

[jeffnhiscars]

Ive done several e36 rack swaps and a.ways have used atf.

[128keaton]

M1 full synthetic ATF or Aisin WS ATF. Both fantastic.

[TobyB]

Redlind D4 and D6 atf's have worked for me in E30, E36, E39 and E46 power steering systems...

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