CARCARETOOL VEHICLE GUIDE

Plymouth Gtx

Plymouth Gtx — 1968–1970, 2-door hardtop; 2-door convertible, 426 cuin ''Hemi'' V8440 cuin ''RB'' V8. Explore engine specifications, fuel economy, dimensions, tire sizes, seating, maintenance and tire-pressure guidance.

Engine426 cuin ''Hemi'' V8440 cuin ''RB'' V8

Transmission4-speed manual3-speed automatic

About the Plymouth Gtx

Plymouth Gtx is a 2-door hardtop; 2-door convertible in the muscle car class, with source data covering 1968–1970. The available vehicle data lists 426 cuin ''Hemi'' V8440 cuin ''RB'' V8 as an engine configuration, paired with 4-speed manual3-speed automatic and a FR layout layout. Public source material describes the model in the context of its design, market positioning and vehicle history.

This Plymouth Gtx guide focuses on the details drivers commonly want to know, including engine information for 426 cuin ''Hemi'' V8440 cuin ''RB'' V8 and 4-speed manual3-speed automatic transmission information. Exact specifications should be matched to the relevant model year and market.

Plymouth Gtx specifications at a glance

Use this table for the model-level essentials. Exact figures may vary by year, trim, engine and market.

Make	Plymouth
Model	Gtx
Model years	1968–1970
Body style	2-door hardtop; 2-door convertible
Vehicle class	Muscle car
Manufacturer	Plymouth (Chrysler)
Production	1967–197144,178 units
Market / country	FI, NL, NZ

Engine, transmission and performance

Engine information for the Plymouth Gtx includes 426 cuin ''Hemi'' V8440 cuin ''RB'' V8.. Transmission information includes 4-speed manual3-speed automatic.. The listed drivetrain/layout is FR layout.

Engine	426 cuin ''Hemi'' V8440 cuin ''RB'' V8
Transmission	4-speed manual3-speed automatic
Drivetrain / layout	FR layout

Dimensions, weight and practicality

Dimensions and capacity figures are presented as published source data when available.

Wheelbase	116.0 in (2,946 mm)
Length	202.7 in (5,149 mm)
Width	76.4 in (1,941 mm)
Height	54.7 in (1,389 mm)

Plymouth Gtx other specifications

Name	Plymouth GTX
Image	1970 Plymouth GTX.jpg
Caption	1970 Plymouth GTX
Aka	Plymouth Belvedere GTX

Plymouth Gtx generations and model years

Where a source covers multiple generations, CarCareTool selects the generation(s) that best match this catalog model instead of mixing unrelated variants.

Generation / scope	Years	Engine	Transmission	Drivetrain
Plymouth GTX	1967–197144,178 units	Not specified	Not specified	FR layout
First generation	1967	426 cuin ''Hemi'' V8440 cuin ''RB'' V8	4-speed manual3-speed automatic	Not specified
Second generation	1968–1970	426 cuin ''Hemi'' V8440 cuin ''RB'' V8	4-speed manual3-speed automatic	Not specified
Third generation	1971	426 cuin ''Hemi 426'' V8440 cuin ''RB 440'' V8	4-speed manual3-speed automatic	Not specified

TIRE PRESSURE

Recommended tire pressure for Plymouth Gtx

Check the vehicle placard or owner’s manual for the manufacturer’s cold inflation pressure. CarCareTool estimates are clearly labelled when an exact verified value is unavailable.

Normal load34 PSI front32 PSI rear

Fully loaded36 PSI front35 PSI rear

Load condition	Front	Rear	Status
Normal	34 PSI	32 PSI	Estimate
Fully loaded	36 PSI	35 PSI	Estimate

Calculate how much air to add

Frequently asked questions about Plymouth Gtx

These FAQs are generated automatically for this specific vehicle from the specifications, features and ownership data available in CarCareTool. Questions are selected by relevance so the page focuses on details that can actually be answered for this model.

What engine does the Plymouth Gtx have?

The available source data lists the Plymouth Gtx engine as 426 cuin ''Hemi'' V8440 cuin ''RB'' V8. Engine availability can differ by model year and market.

What tire pressure should I use for the Plymouth Gtx?

For the correct setting, use the cold inflation pressure on the vehicle placard or in the owner’s manual. When CarCareTool does not have a verified configuration-specific value, its starting estimate is 34 PSI front and 32 PSI rear for normal load. This is an estimate, not an OEM recommendation.

What is the best engine oil for the Plymouth Gtx?

There is no single best engine oil for every Plymouth Gtx configuration. Use the viscosity grade and manufacturer approval specified for the exact engine in the owner’s manual.

What body style is the Plymouth Gtx?

The Plymouth Gtx is classified as a 2-door hardtop; 2-door convertible.

What years was the Plymouth Gtx produced?

The available vehicle record places the Plymouth Gtx in the 1968–1970 period. Exact availability can vary by market.

What are the dimensions of the Plymouth Gtx?

The available source data lists length 202.7 in (5,149 mm), width 76.4 in (1,941 mm), height 54.7 in (1,389 mm), and wheelbase 116.0 in (2,946 mm).

What transmission does the Plymouth Gtx have?

The available source data lists 4-speed manual3-speed automatic transmission options for the Plymouth Gtx.

Is the Plymouth Gtx FWD, RWD or AWD?

The listed drivetrain/layout for the Plymouth Gtx is FR layout.

Who makes the Plymouth Gtx?

The manufacturer listed for the Plymouth Gtx is Plymouth (Chrysler).

When was the Plymouth Gtx produced?

The available source data describes production as 1967–197144,178 units.

Where was the Plymouth Gtx built?

The available source record lists assembly information as United States: Detroit, Michigan (Lynch Road Assembly).

What class of car is the Plymouth Gtx?

The Plymouth Gtx is listed in the Muscle car class.

What platform does the Plymouth Gtx use?

The available source data lists the platform/chassis as B-body.

Which markets or countries sold the Plymouth Gtx?

The CarCareTool catalog currently associates the Plymouth Gtx with FI, NL, NZ. Market availability and specifications can differ.

What cars are related to the Plymouth Gtx?

The available source data identifies related models as Dodge ChargerPlymouth BelvederePlymouth Satellite. Relationships can vary by market and generation.

How often should I check the tire pressure on the Plymouth Gtx?

Check the tires regularly and before long trips, with the tires cold. Use the vehicle placard or owner’s manual as the source of the manufacturer’s recommended pressure.

Should I use the tire sidewall pressure for the Plymouth Gtx?

No. The maximum pressure printed on the tire sidewall is not automatically the vehicle’s recommended setting. Use the vehicle placard or owner’s manual for the correct cold inflation pressure.

Does the recommended tire pressure change when the Plymouth Gtx is fully loaded?

It can. Many vehicles specify a different cold pressure for heavier loads. Check the vehicle placard or owner’s manual for the exact loading condition.

Can the Plymouth Gtx have different tire pressures front and rear?

Yes. Some vehicles specify different front and rear pressures because axle loads and vehicle configurations differ. Follow the exact vehicle recommendation where available.

Why can mileage differ from the published figure for the Plymouth Gtx?

Published fuel economy is measured under a defined test method. Real-world mileage can vary with traffic, speed, temperature, tire pressure, payload, maintenance and driving style.

Data sources and verification are available in the page editor; exact specifications can vary by year, market, trim and engine.

Plymouth Gtx images

Vehicle images are shown from the stored source image records when available.