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Author
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Topic: Moving rear axle back?
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steve'66
Gearhead Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-04-2003 08:32 PM
   
Anyone ever moved their rear end forward or back by relocating the center hole in the spring perches? I've got 3/4" clearance in the front of the 26" tall slicks and 2 1/4" behind. If I can relocate the axle back 3/4" I can clear 28" slicks. I thought about relocating the spring back, but it'll hit the vallence if I do. Any ideas?SteveW
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jsracingbbf
Gearhead Posts: 2160
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 05-04-2003 10:21 PM
Steve, I moved mine back to keep from "sectioning" the fender wells like alot of guys do to run bigger tires. BUT it was done when we back halved the car. We just made a new center line 2 inches back from the original. I also lengthened my front end when I did the front clip this last winter. wasn't any harder than welding it back in the same place really. I think you could do it. I don't know about a leaf spring car but it helped my car.
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Jerry
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car "Whiskey for my men, beer for my Horses" -- Toby Keith
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jsracingbbf
Gearhead Posts: 2160
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 05-04-2003 10:22 PM
Might be a good time to go with a coilover kit huh Steve? 
JS
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steve'66
Gearhead Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-04-2003 10:23 PM
Jerry,I just don't want to hammer or take a sawzall to the rear 1/4's. I have too much personal time invested in the bodywork.  SteveW
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steve'66
Gearhead Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-04-2003 10:25 PM
Jerry,No coilovers, I gotta try these cool fiberglass mono's/cal-tracs first. SteveW
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Rory McNeil
Gearhead Posts: 1311
From: Surrey, B.C. Canada
Registered: Nov 2000
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posted 05-04-2003 11:25 PM
Steve, I`ve moved the housing back on my 70 Mach 1 years ago, it worked out fine. I just moved it back about 3/4", as a 28" slick would fit as is. but tire growth caused some light contact at the front of the wheelwell/rocker panel area. All I did was drill a new hole in the leaf spring perchs for the center bolt. On my car I didn`t even need to do anything with driveshaft, as the slip yoke was in the trans. more than enough.------------------
78 Fairmont 428 4 speed 10.20@130mph
80 Fairmont 302 5 speed 12.8@105mph
85 Mustang NHRA Stocker under construction, 302 5 speed
59 Meteor (Canadian Ford) 2 dr sedan 332, auto
74 F350 ramp truck 390 4spd
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steve'66
Gearhead Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-04-2003 11:26 PM
Rory,Thanks! That's what I'm talking about. Glad to hear that it didn't cause any other problems.  SteveW
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TomP
Gearhead Posts: 5025
From: Delta BC Canada
Registered: Dec 99
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posted 05-05-2003 02:29 PM
I've moved mine forward doing the same thing with the center hole on the perch. If you have to cut the quarters anyways, move it forward and just cut the front side. On 64-65 Falcons and Comets this prevents the "Weiner Dog" look
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jsracingbbf
Gearhead Posts: 2160
From: Batesville,MS. , U.S.A.
Registered: Mar 2002
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posted 05-05-2003 03:48 PM
Longer wheelbase = more high speed stability.
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TomP
Gearhead Posts: 5025
From: Delta BC Canada
Registered: Dec 99
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posted 05-06-2003 11:05 PM
Longer wheelbase = more front heavy too.It's easier to get the shorter wheelbase car to hook. Adding 3/4" isn't going to make a noticable difference in stability or traction anyways.
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popeye
Gearhead Posts: 124
From: midwest USA
Registered: Dec 2002
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posted 05-07-2003 12:40 AM
Steve we moved the rear housing back on the '69 fastback 5/8 of an inch by drilling a new hole in the spring perch too.We've had a 29x10 slick on the car with no problems.
popeye ------------------
This is FORD COUNTRY, where on a quiet night, you can here a chevy rusting
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steve'66
Gearhead Posts: 7226
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 05-07-2003 12:52 AM
Thanks everyone for the reassurance! SteveW
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