Skip the auto shop - Our mechanics make house calls

Q: I have a 1998 Chevy K1500 with a 305. Worn TCC

asked by on

I have a 1998 Chevy K1500 with a 305. I think I either have a 4L80E or a 4L60E. I've determined that I have a worn TCC Regulator Valve. I recently watched a Youtube video on how to fix this issue, it seems reasonably easy to do. My question is about the "performance spring" mentioned in the video, where do it get the spring? Do I buy a performance TCC Valve replacement kit and it comes with it? or can I order the spring separately. Also is it better to install a new TCC valve with the new "performance spring" or is just replacing the spring adequate?

Hi and thank you for submitting a question. Your 1998 Chevy K1500 truck with a 305 has a 4L60E transmission. With what you have described, it sounds like the torque converter clutch (TCC) regulator valve has failed. Usually when this happens, a check engine light appears and when you scan it, it gives off code 1870. What happens is the valve rubs its bore causing leakage and the computer sees this. So the computer demands the pump solenoid to max out the pump pressure. This will cause the TCC to slip and make a hard shift from 1st gear to 2nd gear. Yes, you can buy a kit that will fix this problem. I recommend buying the Sonnax brand spring kit for the TCC valve to solve this issue. You don’t need to remove the transmission to take the valve body off, you can just drop the pan and remove the valve body. Make sure that you do not loose the check balls. Also, when you buy the spring kit, buy a valve body gasket kit. When you remove the valve body, the gaskets will break. You will need to remove the gaskets and replace them with new gaskets. If you replaced the TCC spring with the new kit, depending on how long your transmission has been operated with this condition, you may have to replace the torque converter if you experience phasing in and out of lockup during overdrive. You can purchase the Sonnax brand TCC spring kit at any hot rod and performance place or JCWhitney online. You may be able to get the spring by itself on Amazon, but you will have to wait for shipping days. If you need any extra advice or help with installing the TCC spring kit, consider having an expert automotive technician from YourMechanic come to your home or office to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have a 1998 Chevy K1500 with a 305. Worn TCC

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: misfiring

Hi Rex. You might want to review this article about the P0300 OBD-II Trouble code, which will highlight the top common causes of this error code and what we'd suggest to diagnose the source of this error code; and thus...

Q: Car does not start

This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...

Q: Key is stuck in ignition so i think its causing the battery to keep going dead

Hello there, many common faults will cause your key to become stuck in the ignition in your 2006 Chevrolet Aveo. When the key is in the ignition and turned this puts the vehicle into the on mode, which will drain...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...