John's 4X4 Center
6367 Arapahoe Rd, Boulder, CO 80303 303.449.2640

Drivetrain

Alt + /

Shifty Letters PRNDL (Transmission)

You probably figured out those shifty letters.  They're what you see on your automatic transmission shifter and stand for Park, Reverse, Neutral, Drive and Low.  Your automatic transmission ...
Published on: Feb 01, 2026

Smooth Shifting In Boulder

{{ image('MzI0') }} If you've been paying attention, you've noticed that CO vehicles are getting more and more powerful and at the same time are getting better and better fuel economy . Much of that'...
Published on: Jan 28, 2024

John's 4X4 Center Tech Question On Your Transmission

Question My name is Suzanne.  We were taking a camping trip over a three-day weekend.  About half way to our campsite, the transmission went out on our SUV.  It took all weekend to get...
Published on: Jan 16, 2023

Transmission Service: Smooth Shifting In

Let's suppose you're going to take some friends out on the boat for some water skiing on a beautiful area lake. Of course, you get the boat ready, but what about your tow vehicle?Think about it - hea...
Published on: Aug 19, 2022

Why You Need to Change Your Transmission Fluid

It’s easy to forget about servicing your transmission because it doesn’t need it very often, but proper transmission service keeps your vehicle running smoothly and helps you avoid costly ...
Published on: Dec 14, 2019

Transmission

Let's talk about your transmission.Transmissions are heavy duty pieces of equipment that are designed to last a long time for most drivers. But like any other machine, they'll eventually wear out and...
Published on: Nov 11, 2019

CO Fuel Saving Tip: Dirty Oil

If you’re a quart low, there isn’t enough oil to lubricate your engine properly.  The extra friction causes drag that reduces fuel economy. Same goes for dirty oil.  It doesn&rs...
Published on: Nov 24, 2018

Simple Answers from John's 4X4 Center in Boulder: Transmission Service

Question My friend just had a very expensive transmission repair.  How can I avoid transmission trouble? Answer Next to your engine, your transmission is the most expensive component in your v...
Published on: Aug 29, 2017