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Mod | | | Forums66 Topics128,140 Posts1,056,770 Members48,454 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Jan 2003 Posts: 68 New Guy | | New Guy Joined: Jan 2003 Posts: 68 | Hi all. It's been a while since I posted here. Moved from Fla to SC, took my project truck with me, and I'm finally getting back into it. My delimma ... Whe I acquired my 50 3/4 ton pickup a previous owner had already replaced the rear member with a 70's 14 bolt rear. I want to relocate it back a couple of inches to get it better centered in the wheel wells. I've been pouring through the posts and I've read posts that say the rear leafs CAN be reversed to recenter the rear end, and I've read they CAN'T be turned around. Has anyone actually done this, or can tell me if it can done or not? I'm not concerned about the driveshaft issue since I'm doing a rod project and will be custom fitting a driveshaft later anyway. Any tips from someone who has done this sucessfully would be most appreciated! Thank you! 50-3600-guy | | | | | Joined: Mar 2006 Posts: 262 Shop Shark | | Shop Shark Joined: Mar 2006 Posts: 262 | Might be easier to weld on new perches on the rear end. The guy that did mine said he got them from a trailer supply place and they have 3 or 4 holes in them so you can move the rear end a little forward or back.
My truck: She may not be the prettiest girl at the dance, but she's all mine!
| | | | | Joined: Oct 2006 Posts: 4,983 Master Gabster | | Master Gabster Joined: Oct 2006 Posts: 4,983 | Don't forget your 3600 is very different from a 3100 back there in the rear. Not only is your frame more narrow but your springs swing from the outside of the frame. Anyone giving you advice should be aware of this. Good luck with the move.
~Jim
| | | | | Joined: Jan 2003 Posts: 68 New Guy | | New Guy Joined: Jan 2003 Posts: 68 | Thanks for the input guys. I have considered welding on new perches, but it seemed like an easier fix to just reverse the leaf springs if it's possible. I've searched through the archives some more and can't find where anyone has claimed to have actually done this. Maybe reversing the leafs is just one of those myths. Thanks again, 50-3600-guy | | | | | Joined: Feb 2003 Posts: 452 Shop Shark | | Shop Shark Joined: Feb 2003 Posts: 452 | Would reversing the springs help? The reason I ask, 3100's have the spring pin off-center because the axle pivots behind the spring mount. 3600 axles arehard-mounted to the springs, so wouldn't the pin be in the middle?
Good luck.
Current fleet (subject to change w/o notice) \'49 GMC 3/4-Ton , 60 Austin Healey Frog-eye Sprite (some assembly required), 2011 Dodge Avenger, 2015 Jeep Cherokee. No, they don't all run. My other ride is a (B737)no, (B767)no, A320.... Update... was Embraer E190, now Boeing B787. Knowledge is a wonderful thing, but ignorance means you don't know you can't do something.
| | | | | Joined: Jun 2006 Posts: 91 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2006 Posts: 91 | Great question. I am at that point on my rebuild, putting the rear leaves back on. My 3600 pins are not centered on leaves and I have also considered reversing them to move axle back alittle. I wondered if my stock driveshaft would be to short to do that. | | | | | Joined: Jan 2003 Posts: 68 New Guy | | New Guy Joined: Jan 2003 Posts: 68 | Highflyer - A previous owner replaced the stock rear axle with a 70's 14 bolt rear. It sits just forward of center. If the springs were able to be reversed it would move the rear axle back about 2 inches, centering it in the rear fender well. Shell - I believe you would need a new driveshaft since it would be pulled away from the tranny by a couple of inches. Also to consider - hyd brake line and emerg brake lines would need attention, as well as anything else connected to the rear like anti-sway bar, etc. | | |
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