• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

PST replacement LCA Shafts

AR67GTX

FBBO Gold Member
FBBO Gold Member
Local time
11:31 PM
Joined
Jan 28, 2012
Messages
6,240
Reaction score
6,685
Location
Arkansas
Doing my first Mopar suspension overhaul. My shafts were a little worn around the front threaded area so I ordered some new shafts from PST. They are nicely machined but being unable to leave well enough alone I started comparing them to the originals. For the most part they are slightly greater in dimension which is good IMO.

However there is one area in the frame section that is measurably undersized per the originals. I've starred the dimensions in this photo/sketch.

Neither one fits exactly snuggly in the frame - both have play in them although the new one is maybe slightly looser. I was expecting a fairly snug fit for this connection. I don't know if there is anything inside the K-frame like a sleeve that these are supposed to fit into with minimal clearance - maybe not. The play in the shaft and the play in the torsion bar link in the LCA really make for a loose connection. I understand that the strut bar is supposed to take the play out of the LCA when tightened.

Anyone else notice these being a little loose before tightening? Anything I should be concerned about? Pretty much normal?

Thanks
 

Attachments

  • IMG_3242.jpg
    IMG_3242.jpg
    56.1 KB · Views: 246
  • IMG_3241.jpg
    IMG_3241.jpg
    66.9 KB · Views: 229
Last edited:
Hello,

The specs that you have on the right side are pretty much dead on to the blue prints that we use . Starting from your top measurements down. Here is what I have on file. .6790, .8120, .9117 and .9448. If you have any questions please do not hesitate to call me. Our shafts are based off a new old stock mopar.

Thanks
James From
 
Thanks James - I was hoping someone from PST might look at this. The one dimension that seems shy is the .679 near the threads - that's significantly less than the .666 I measured with calipers.

I assume the E and A body shafts are significantly different enough that I couldn't have accidently received a pair of them by mistake?

Baring that, I guess Mopar didn't see a need for a close tolerance connection there.
 
The A body shafts are shorter in length as well as in taper. The B and E bodies use the same shafts. The overall length of the shafts that you should have received should be 6.670"

Thanks
James
 
Auto Transport Service
Back
Top