answering my own question as I looked on a recent stovebolt search and it appears to be a eaton. Now I need to confirm gear ratio as I have a 261 engine with a 1986 s10 T5 transmission,I hope it was changed to 3.55 otherwise it is a 3.90
Last edited by Rick Brown; Wed Mar 18 2020 12:43 AM. Reason: correction
If your trans has an 0.82 od then the 3.55 is good (2.91 final drive) but if it has the 0.67 od the 3.90 would be better (2.61 final drive). The 3.55 with a 0.67 is a very shallow 2.28 which might require 4th gear with hills or strong head winds.
Thanks Evan for your response. My s10 fifth gear is 0 .76 so accordingly if it is
A 3.90 x 0.76 = 2.96
B 3.55 x 0.76 = 2.69
c 3.73 x 0.76 = 2.83
According to Tom Langdon web site the gear ratio should be between 2.50 and 3.0 so looks like whatever I have is within range. I will take the differential cover off to determine exactly what I have then the question is what is the preferred ratio or should I not worry about it?
I'm sure you will be taking off the cover. Then you can read the stamp on the ring gear to confirm ratio. That is the only way to be sure. There was no NAPCO rear end. Same as 2WD. That is the all time worlds record sketchy rear end swap I have ever seen. A coil that seems to do nothing, welded to the tube, on top of leaf springs with welded Ubolts to the tube. I can't look at it.
I'm away on an ego trip. Will be back on Feb 30. I'm not an Auto Mechanic, but I play one on TV. I charge $0.02 for every opinion and I take Paypal. Plan B is always better than plan A, by definition.
Good observation bartamos I too thought this was the strangest rear end I have seen. Now the question is it worth trying to make work or start looking for something else? Or could I simply cut off what appears to be coils going nowhere and look for a proper spring bracket kit?
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
I'm afraid that something like those coils were on my truck when I got it. Some big round "sockets" welded below the frame arch. Those were the first things to go. I whacked them off as soon as I had the bed removed. I'm sure they reduced the spring travel and served as "axle bumpers" providing a nice steel-on-steel contact.
Kevin First car '29 Ford Special Coupe #2 - '29 Ford pickup restored from the ground up. Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com] Busting rust since the mid-60's