2004 Jeep Wrangler TJ Upgrades for Optimal Street and Highway Use

Summary

For a mostly street/highway 2004 TJ, focus first on safety and road manners: tires, brakes, steering, and shocks. The hidden cost is chasing worn front-end parts if it has any wobble or wander.

Best upgrade path

1. Tires & alignment — Good all-terrains in a mild size and a proper 4‑wheel alignment make the biggest difference in feel and safety.
2. Brakes refreshed — New rotors/pads up front and serviced rear drums so it actually stops like it should.
3. Steering & suspension refresh — Tighten up all the worn TJ bits that cause wandering and shimmy.
4. Comfort/driveability — Small stuff: stereo, sound deadening, maybe a tiny lift later if you want the look.

The parts to do it right

• 31x10.50R15 A/T tires on stock wheels — Slightly bigger than stock, still light, good on-road manners; no lift needed if bump stops are intact.
• Quality gas shocks (stock height) — Old TJs usually ride like a pogo stick; fresh shocks calm it down.
• Front brake rotors & ceramic pads — Name-brand, not bargain-bin; warped or rusty rotors are common.
• Rear drum shoes + hardware + proper adjustment — Most people ignore the rear; they do a lot of work on a short-wheelbase Jeep.
• Complete front-end check & parts as needed — Track bar, tie rod ends, drag link ends, unit bearings, ball joints; replace anything with play.
• Steering stabilizer (only after fixing play) — New OE-style damper to smooth out shimmy, not to mask worn parts.
• Fresh rubber bushings where cracked — Control arms and sway bar bushings affect stability and braking feel.
• All fluids baseline — Engine oil, trans, t‑case, diffs, coolant, brake fluid; you want a known starting point.

Things to consider

• Any hint of death wobble or shimmy: do not ignore; fix before highway use.
• Avoid a big lift and 33s if you’re mostly street — it hurts braking, gearing, and stability unless you spend real money supporting it.
• Check frame rust, especially rear control arm mounts and steering box area, before throwing parts at it.
• Make sure the steering box bolts and track bar bolts are tight and holes not wallowed out.
• An alignment after any front-end work is non‑negotiable.

Realist expectations & tradeoffs

• It’ll never ride like a modern SUV; short wheelbase and solid axles are what they are.
• Good tires, shocks, and a tight front end make it stable to 70–75 mph, but crosswinds will still move it around.
• Bigger/heavier tires or lifts will hurt braking and MPG unless you re‑gear and upgrade brakes.
• Sound deadening and a decent stereo help a lot, but it’s still a noisy brick on the highway.

Questions

• Is the Jeep currently stock height on stock wheels/tires, or has someone already lifted/modified it?
• Do you feel any shake, wander, or brake pulsation on a test drive now?