Slow Speed Braking Shake in the Rear

Wifey called me frantic that our G2 had stopped running on her while driving in local traffic. Red triangle went on. Luckily, she was able to steer off the road, hit the stop button, But then the car restarted and she was able to drive home?

So I had her drive the car to our local indy with me following close behind. Thats when I noticed that when she was slowing the rear of the car started shaking 3-5 inches to left and right. This happened every time she was slowing to a stop and is visibly pronounced from like 5 mph to a full stop.

Not sure if one problem is related to the other, but Im stumped as to what the rear end shake is.

 

Interesting comments, I'll have to check fluid & rear braking function.

 

Tech tells me he is leaning towards the problem being the abs control module, but also said to replace the pump at the same time. Apparently, he's seen the pump fail right after changing the module before. I've been using this guy for about 5 years with all my cars & he's been pretty solid. He did say there was some reprogramming involved in the control module change out and told me if I get it off of ebay, he'd have to pull the part out of my car first for me to verify some numbers.

The brake fluid was the first thing checked as well as the tires / wheels. All as they should be.

I should ask him if he was able to verify an ABS issue with the rear wheels in the air. That was a really good suggestion @Mendel Leisk

 

I know him personally. He doesn't need the money. But I appreciate the concern.

 

Finally getting around to jumping back into this. Up 'till now the only issue (other than that 2-3mph rear end shake) started showing up at initial start. With the first braking event backing out of a parking space. it took two taps on the petal to have the normal to touch power brakes instead of what felt like a brake petal without power assist. I didn't experience the brake drag that other have experienced until just now. So, I can't run from the repair any longer.

The car itself is a base w/ 223k, I had to replace the three-way valve right after my purchase from Manehim Ft Laud & the VIN showed a battery replacement at 170k so the repair seems to make sense.

I've read that there are cross over p/n's and I've found a few to reference. I found the below pn#'s on dealer web sites:
44500-47090 / now 44500-47091 / 2004-2006 Actuator assy.
44500-47140 / now 44500-47141 / 2006-2009 Actuator assy.

The below pn#'s referenced by multiple suppliers but are not found by searching on dealer web sites, no Idea what they are.
44510-47050
44510-47051
44535-47050

Guessing if going new, 47141 is preferred. Some say avoid used. But others say there's no issue with used. But since the fail seems relatively common, is anyone doing remanufacturing or rebuilding? It seem that the Dorman 587-765 - ABS Control Module is unavailable until further notice. And the address for Prior Remanufacturing, Inc on Loopnet out of Dallas shows a vacant building with the Prior sign hanging half-way off the building.

If no one is aware of anyone else that's rebuilding or re-manufacturing, it would be helpful if anyone who knows about the issue that some have posted about installing used units would comment. Seems that some state you need to pull the existing unit, compare the part number, and install the exact same part number to avoid issue with communicating with the pump.

Others make no mention of this. Can anyone offer any insight or experience on this?

 

@Tombukt2, @ChapmanF

Thanks for the arrow pointing. Mine is a g2.

 

Just posting the solution post.

The pn on my unit happened to be 44510-47050. I picked up the cleanest looking one with this pn# on it off fleabay. Once installed the slow speed rear shake went away & so did the brake drag. All good