# 1998 Honda Civic ex auto trans starts to shift hard and slip after engine is hot

**URL:** <https://community.cartalk.com/t/1998-honda-civic-ex-auto-trans-starts-to-shift-hard-and-slip-after-engine-is-hot/121341>\
**Category:** Maintenance/Repairs\
**Tags:** civic, honda\
**Created:** [July 20, 2018, 1:27am UTC](https://community.cartalk.com/t/1998-honda-civic-ex-auto-trans-starts-to-shift-hard-and-slip-after-engine-is-hot/121341 "2018-07-20T01:27:49Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Cesar\_West](https://avatars.discourse-cdn.com/v4/letter/c/c6cbf5/32.png) [@Cesar\_West](https://community.cartalk.com/u/Cesar_West)\
**Post date:** [July 20, 2018, 1:27am UTC](https://community.cartalk.com/t/1998-honda-civic-ex-auto-trans-starts-to-shift-hard-and-slip-after-engine-is-hot/121341/1 "2018-07-20T01:27:49Z")

</div>

Would you have any idea what it is I have codes  
Po700 po740 po730 yet both set of solenoids read good ohms and trans fluid look and smell fine

---

<div class="post-metadata">

**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [July 20, 2018, 12:09pm UTC](https://community.cartalk.com/t/1998-honda-civic-ex-auto-trans-starts-to-shift-hard-and-slip-after-engine-is-hot/121341/2 "2018-07-20T12:09:13Z")

</div>

Your codes mean:

Common Problems That Trigger the P0700 Code  
Defective Shift Solenoids  
Defective Engine Coolant Temperature Sensor  
Defective Valve Body  
Dirty transmission fluid that restricts the hydraulic passages

Common Problems That Trigger the P0740 Code  
Defective Torque Converter Lockup Solenoid  
Defective Engine Coolant Temperature Sensor  
Defective Torque Converter Clutch  
Defective Valve Body  
Dirty transmission fluid that restricts the hydraulic passages

Common Problems That Trigger the P0730 Code  
Defective Shift Solenoids  
Defective Engine Coolant Temperature Sensor  
Defective Valve Body  
Dirty transmission fluid that restricts the hydraulic passages

You only say you checked the solenoids… A bad engine coolant temp sensor is listed as a cause on all 3 codes. I’d replace it just as a matter of maintenance on a 20 year old car. They are cheap and much easier to replace than a defective valve body which is also listed for all 3 codes. Good Luck!