Skip to main content
Topic: '99-'04 Mustang axles into a 7.5" (Fitment & Feasibility) (Read 1370 times) previous topic - next topic

'99-'04 Mustang axles into a 7.5" (Fitment & Feasibility)

I was thinking about putting some '99-'04 Mustang axles into my '87 7.5" rear end. The housings should be very close or the same in width. Data from Jim Miller's thread shows they're .06" different. Installation of the Detroit TrueTrac and rear girdle should increase the strength enough to live behind a mild 351W sans slicks and drag launches. Does it save much weight or make monetary sense, no. :hick:
.
On the fitment issue, I'm sure members have swapped in Mark VII rears, but I can't find any threads regarding it. I'm worried about tire/wheel to fender clearance

'99-'04 Mustang axles into a 7.5" (Fitment & Feasibility)

Reply #1
There shouldn't be any tire/fender clearance with the wider axles.  How wide of a tire?  Under 275?  You should be fine.
Long live the 4-eyes!  - '83 Tbird Turbo - '85 Marquis LTS - '86 LTD Wagon

'99-'04 Mustang axles into a 7.5" (Fitment & Feasibility)

Reply #2
Yes, no wider than 255.

'99-'04 Mustang axles into a 7.5" (Fitment & Feasibility)

Reply #3
It makes more sense to gain 80lbs with an 8.8 swap from a 'Stang...they can be had for next to nothing.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

'99-'04 Mustang axles into a 7.5" (Fitment & Feasibility)

Reply #4
But hardly anyone does up a 7.5" rear...and I think that's the point here. You CAN build one, have it all, and not add as much weight as you would swapping in an 8.8" rear. Personally I can't wait to see it all done.

'99-'04 Mustang axles into a 7.5" (Fitment & Feasibility)

Reply #5
the 99-04 mustang rears are over an inch wider than the 94-98 rears
95 Ranger Splash 2.3
88 Tbird Sport :ies::ies:
5.0 SO, stainless shorty headers, w/ Magnaflow lers. KYB struts, KYB shocks. 5lug conversion from sn95 Mustang, subframe connectors, drilled and slotted rotors, 03 Mach 1 wheels. sequential taillights.140 speedo

'99-'04 Mustang axles into a 7.5" (Fitment & Feasibility)

Reply #6
Quote from: cougarman;149945
the 99-04 mustang rears are over an inch wider than the 94-98 rears

They're about the same as the SVO/Mk7 rears....and I had one under the Tbird for a while and still had plenty of clearance.
Long live the 4-eyes!  - '83 Tbird Turbo - '85 Marquis LTS - '86 LTD Wagon

 

'99-'04 Mustang axles into a 7.5" (Fitment & Feasibility)

Reply #7
the whole axel will fit fine but the shafts are a no-go in the older housing, i had a rear end from a 01 gt and not only was the housing wider but the mounting for the LCA's were further apart also.
95 Ranger Splash 2.3
88 Tbird Sport :ies::ies:
5.0 SO, stainless shorty headers, w/ Magnaflow lers. KYB struts, KYB shocks. 5lug conversion from sn95 Mustang, subframe connectors, drilled and slotted rotors, 03 Mach 1 wheels. sequential taillights.140 speedo