SN95 Rollercoaster

[Real98roush]

We’re buying a new house, so I made a decision to sell a car. I love the performance of the 03 Cobra, but not enough to keep it over the Mystic. I accepted an offer from a guy in Denver. He’s coming this weekend to pick it up.


IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[96GT226410]

I'm glad you still the Mystic. Good luck with your new house!

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[Real98roush]

Bought a new house, so the cars went on the back burner while we renovated and got settled in.

IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[Real98roush]

Needed a daily so I picked up an 03 HD F-150 with 35,000 miles

It’s stock... for now!


IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[Real98roush]

The Mystic’s rear end was tired, so I pulled it for a refresh

Bilstein absorbers, MM LCA’s, MM TA springs, 4:10 gears, carbon shims, Ford girdle. Not pictured panhard bar and torque arm.

Pulled everything, but got stuck because I don’t have a press to replace the differential bearings. I’ll have a shop press them on for me this week.


IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[98 svt]

The Mystic’s rear end was tired, so I pulled it for a refresh

View attachment 1543497View attachment 1543498

Bilstein absorbers, MM LCA’s, MM TA springs, 4:10 gears, carbon shims, Ford girdle. Not pictured panhard bar and torque arm.

Pulled everything, but got stuck because I don’t have a press to replace the differential bearings. I’ll have a shop press them on for me this week.


IG: @sn95mystic

SVTP: SN95 Rollercoaster

Nice. I want to see if the panhard clears the girdle. I currently have a LPW girdle and have a MM panhard bar awaiting install.

 

[Tabres]

I want to see if the panhard clears the girdle.

It will. The Ford Racing girdle is actually made by TA Performance. I have the same one (albiet TA Performance branded) on my car and it clears my panhard bar with plenty of room.

 

[mysteed]

Just read this thread start to finish and props for sticking with the Mystic through all the issues it has had.

 

[9397SVTs]

It will. The Ford Racing girdle is actually made by TA Performance. I have the same one (albiet TA Performance branded) on my car and it clears my panhard bar with plenty of room.

I have the Ford Racing girdle and it clears on my car as well.

 

[1996MysticSnake]

I have an lpw and it clears on mine also

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[Real98roush]

Had new bearings pressed on the differential and pinion. New axle bearings. Put it back together using the original shims. Backlash was good but the pinion was a little shallow. Pulled apart to have a shim added to the pinion.

you can see how the gear marking compound is wiped completely off the outer edge but remains on the inner portion of the ring gear.

IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[Real98roush]

Left the pinion as-is, but tightened up the backlash based on advise from Dan’s Driveline, a local shop.

I originally reused the cast shims from the factory. They advised me to used the shim pack that came with the installation kit.

Backlash with the cast shims was 0.020. Ford spec calls for 0.008-0.012. Measured the cast shims, put together a cluster of similar thickness for each side, then took a shim from one side and put it on the ring gear side. Checked backlash and it was still loose. Swapped around shims probably 5x before I found a combination that had a backlash of 0.010. Such a tedious process.

I’m not totally sure if the new pattern is ideal, but I’m going to roll with it.

Installed the axles, filled with gear oil, and installed the girdle. Ready to go back into the car.

IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[96GT226410]

Left the pinion as-is, but tightened up the backlash based on advise from Dan’s Driveline, a local shop.

I originally reused the cast shims from the factory. They advised me to used the shim pack that came with the installation kit.

Backlash with the cast shims was 0.020. Ford spec calls for 0.008-0.012. Measured the cast shims, put together a cluster of similar thickness for each side, then took a shim from one side and put it on the ring gear side. Checked backlash and it was still loose. Swapped around shims probably 5x before I found a combination that had a backlash of 0.010. Such a tedious process.

View attachment 1545194View attachment 1545195

I’m not totally sure if the new pattern is ideal, but I’m going to roll with it.

Installed the axles, filled with gear oil, and installed the girdle. Ready to go back into the car.

View attachment 1545196



IG: @sn95mystic

SVTP: SN95 Rollercoaster

Nice. It is tedious, but imagine how annoyed you'd be if the rest made noise after you installed it. It happened to me once, I was so pissed. Ha ha.

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[Real98roush]

Nice. It is tedious, but imagine how annoyed you'd be if the rest made noise after you installed it. It happened to me once, I was so pissed. Ha ha.

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:fingerscrossed: hopefully it’s all good


IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[Real98roush]

Back together and functioning perfectly. No gear noise.

I left the rear spring isolators out and taped the spring ends. No noise so far and glad I did. The rear end is sitting about 2” higher than I’d like. I’m sure it’ll drop slightly once the springs break in.

Didn’t install it the PHB. I’m going to get the SFC’s welded in and install the PHB and TA together.

IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[Real98roush]

IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[96GT226410]

View attachment 1545309View attachment 1545310


IG: @sn95mystic

SVTP: SN95 Rollercoaster

Beautiful.

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[Real98roush]

Adjusted the Dallas Speedcal for the new gear ratio. The dip switch combo for the stock 3:27 is the first photo. It’s hard to see in the photo without looking really close.
0010000000

3:27 to 4:10 is 0010100000

Verified the speedometer with GPS.

IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[Real98roush]

Do you have the dip switch combo for 4:30 gears?

Are you happy with the 4:10s or do you wish yo had gone with a different gear?

There’s a chart on AM with the dip switch combos.

Mustang Speed Calibrator - DIP Switch Settings | AmericanMuscle

I’m happy with the 4:10’s so far.


IG: @sn95mystic

SVTP: SN95 Rollercoaster

 

[Real98roush]

Planned on finishing up the rear end this weekend. Went to the shop Friday to get the SFC’s welded in, so I could install the torque arm and pan hard bar.

They were having issues with another vehicle they were working on, so I had to reschedule.

IG: @sn95mystic

SVTP: SN95 Rollercoaster