SpecWrench vs · General AI

ChatGPT is great.
It just doesn't know your Gladiator.

General AI is a brilliant generalist. But on safety-critical specs for one exact truck — the 2021 JT Rubicon, 3.6L Pentastar, 850RE — “mostly right” isn't good enough when a torque value snaps a steering part. SpecWrench answers from a cited, verified reference library and accounts for your build.

Side by side

	SpecWrench	ChatGPT / general AI	All-makes AI apps
Scope	One platform — the JT, in depth	Everything, shallow on specifics	Every make & model
Factory specs	Cited & verified	Often confidently wrong	Model-generated, uncited
Source on every answer	Yes	Rarely / unverifiable	No
Build-aware	Yes — your mods change the answer	Generic unless you re-explain	Garage memory, still a general model
Safety flags	On torque, fluids, brakes, steering	Inconsistent	Inconsistent

We tested it — 50 hardest JT questions

Same AI model in every condition — only the grounding changed, to isolate what the knowledge base actually adds. Graded against our cited reference library.

SpecWrench (KB-grounded)

50 / 50

0 confidently wrong

Frontier AI + web search

32 / 50

4 confidently wrong

Frontier AI, no search

10 / 50

21 confidently wrong

On safety-critical specs alone (torque / brakes / suspension / fluids, n=26): SpecWrench 26/26, the web-searching model 4 confidently wrong.

Where general AI got it wrong

Real misses from the test — confident, specific, and wrong. The factory-correct values are from the service manual; always verify them there before you wrench.

Front track bar bolt torque?

✓ Factory52 ft-lb + 115° (torque-to-yield, at ride height) — both ends

✕ AI said130 ft-lb, no angle

A loose front track bar is a leading death-wobble cause.

Lower ball joint nut torque (Rubicon)?

✓ Factory15 ft-lb, then 33 ft-lb — the Rubicon's aluminum knuckles

✕ AI said59 ft-lb (the cast-iron Mojave figure, inflated)

Over-torquing an aluminum knuckle is how you crack a steering part.

Pitman arm nut torque?

✓ Factory177 ft-lb (240 N·m) — do not reuse the nut

✕ AI said184 ft-lb — and it dismissed the correct figure as outdated

The single highest torque in the JT steering system.

Any recalls on my V6 automatic?

✓ FactoryNHTSA 22V638000 (rear camera) + 24V652000 (cluster)

✕ AI saidListed the EcoDiesel fuel-pump recall — doesn't apply to the V6

Wrong campaign numbers send you chasing the wrong fix.

Get the spec right the first time

Cited factory specs for your Gladiator, tuned to your build.

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