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TeraFlex 3.5-inch performance spacer lift kit
A lift kit from TeraFlex: 3.5 in front lift. TeraFlex makes it for 1 truck generation, each with its own part number and conditions.
- 1 part number
- 1 truck generation
- 1 available to buy
The TeraFlex 3.5-inch performance spacer lift kit in brief
TeraFlex makes the 3.5-inch performance spacer lift kit for the Jeep Gladiator JT pickup, and the maker lists one part number for it, 1375300. The kit type is a spacer lift with a single 3.5 in front figure, and the maker gives no separate front and rear values. It is a 4WD fitment, and the Gladiator is sold as 4WD only. The largest tire the maker lists is 37 in, split by fender: 35 in with Sport or Overland fenders and 37 in with Rubicon fenders. Shocks are not included. TeraFlex requires longer aftermarket shocks and recommends Falcon. Alignment is required, and caster correction is also required and not included. The maker puts install time at about 5.5 hours. The kit is listed for the 2020-2026 Jeep Gladiator, and the maker names parts you must add.
Specifications from the maker
Which part number is yours
Match one number here, 1375300. TeraFlex lists it for the JT Gladiator pickup and gives no years or trims, so the maker does not break the part number out by cab, bed length or trim. The detail that matters is the fender: 35 in tires with Sport or Overland fenders, 37 in with Rubicon fenders. The conditions the maker attaches go well beyond the box contents. Caster correction is required and not included, and the maker names three routes: front lower sport control arms 1253000 with frame bracket kit 1938125, adjustable arms, or the HD forged adjustable track bar 1753420. Longer shocks are required too. The wheels need 4.75 in backspacing or less, or the adapter pair 1057000. Before you buy, confirm the listing shows 1375300, then add the caster parts and the shocks to the job, since neither comes in the kit.
Trucks it fits
-
2020-2026 Jeep Gladiator
- Fits, 1375300
TeraFlex 1375300 is for the 4WD JT Gladiator pickup, and TeraFlex gives no years or trims. It does not include shocks and requires longer shocks, with Falcon recommended. Caster correction is required and not included (front lower sport control arms 1253000 and frame bracket kit 1938125, or adjustable arms, or HD forged adjustable track bar 1753420), it needs aftermarket wheels with 4.75 in backspacing or less or adapters 1057000, and install takes about 5.5 hours.
Before you buy a lift kit
- Lift kit or leveling kit
- Leveling kit side effects on a pickup
- Largest tire after a lift or leveling kit
- Payload and GVWR after bed accessories
Questions owners ask
Does the TeraFlex 1375300 kit include caster correction?
No. The maker lists caster correction as required and not included. It names front lower sport control arms 1253000 with frame bracket kit 1938125, adjustable arms, or the HD forged adjustable track bar 1753420.
What is the largest tire for the TeraFlex 3.5-inch performance spacer kit?
The largest tire the maker lists is 37 in. That is 35 in with Sport or Overland fenders and 37 in with Rubicon fenders.
Does the 3.5-inch performance spacer kit come with shocks?
No. TeraFlex says the kit does not include shocks and that longer shocks are required. The maker recommends Falcon.
Is there a separate rear lift number for 1375300?
The maker gives a single 3.5 in figure and no separate front and rear values. Treat 3.5 in as the lift amount the maker states for the kit.
Is an alignment needed after installing it?
Yes. The maker lists alignment as required, along with caster correction. Install time is listed at about 5.5 hours.
Where these figures come from
1 maker documents
- TeraFlex, manufacturer product page (teraflex.com, read with WebFetch), read Oct 24, 2026