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14 Bolt Rear End
#1366090 Tue Jun 23 2020 04:19 PM
Joined: Feb 2017
Posts: 27
F
Fancyt Offline OP
Wrench Fetcher
So finally go the correct 3.73 14 bolt with the correct WMS for my 52 Chevy 3600. Also converted to disc brakes on the rear. However, as I step back and look once more before welding the spring perches, I notice the wheels don't look like they are properly centered in the fenders. Left side has a larger space than right. Also looking down from the top, the drive shaft appears to be making a compound angle towards the passenger side. I know the 14 bolt has a offset pinion. I have taken several measurements across the front to rear and the frame appears to be square and front and rear wheels line up correctly. I can correct this by moving the axle toward the driver side. That will put more space between the driver side leaf perch to the brake mounting flange than the passenger side. The overall distance between perched will still be the correct 41.5". So should there be equal spacing between each leaf perch and the mounting flange?

Re: 14 Bolt Rear End
Fancyt #1366093 Tue Jun 23 2020 04:26 PM
Joined: Oct 2014
Posts: 50
J
Wrench Fetcher
I centered mine measuring off the frame rails. Mine is a 3800 flat bed but the same should apply to yours I would think.

Re: 14 Bolt Rear End
Fancyt #1366121 Tue Jun 23 2020 07:25 PM
Joined: Feb 2017
Posts: 27
F
Fancyt Offline OP
Wrench Fetcher
The original eaton had the spring perches equally spaced from the center line of the pinion. I need to move the perches over by half inch to get the same measurement on the 14 bolt, therefore the spring perches will still be 41.5 inches apart but not equally spaced from the WMS or rotor or whatever point on the outer end of the axle you measure from.

Re: 14 Bolt Rear End
Fancyt #1367686 Sat Jul 04 2020 12:20 PM
Joined: Jun 2005
Posts: 228
W
Shop Shark
I would center the axle based on your wheels and their relation to your frame, not the pinion


'66 c10 rust bucket, 350 nv4500 stock bellhousing, '85 c30 front suspension, h072 rear axle with 3/4 ton rear coil springs
'67 cj5 225 oddfire motor, time for disc brake conversion, offset rear dana 44, intermediate pedals and steering upgrade
'48 3804 frame and bed + '52 6400 cab and front clip + 4bt, need to put them together
Re: 14 Bolt Rear End
Fancyt #1367706 Sat Jul 04 2020 03:20 PM
Joined: Jun 2011
Posts: 3,780
E
Shop Shark
Best to measure from frame to center, tin fenders are not a reliable place to measure from.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.

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