# Sometimes van engine revs and then All trans gears slam **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [November 28, 2018, 2:30pm UTC](https://community.cartalk.com/t/sometimes-van-engine-revs-and-then-all-trans-gears-slam/129794 "2018-11-28T14:30:59Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![renten10er](https://avatars.discourse-cdn.com/v4/letter/r/8e7dd6/32.png) [@renten10er](https://community.cartalk.com/u/renten10er)\ **Post date:** [November 28, 2018, 2:30pm UTC](https://community.cartalk.com/t/sometimes-van-engine-revs-and-then-all-trans-gears-slam/129794/1 "2018-11-28T14:30:59Z")
As above Recently car backed into my 2006 Chevy Van. Shortly thereafter, engine. Sometimes revved high and ALL gears started slamming. When idling normally van shifts normally . Since it’s all gears involved with high idle I"m thinking computer info problem engine communication to tranny. Any ideas? ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [November 28, 2018, 2:50pm UTC](https://community.cartalk.com/t/sometimes-van-engine-revs-and-then-all-trans-gears-slam/129794/2 "2018-11-28T14:50:06Z")
Putting the van in gear while the engine is revving too high will cause slamming. Keep doing this and you will end up with damage to the transmission and other driveline components. You need to fix the revving problem. It could be a sticking throttle, a vacuum leak, or some other problem. Is the Check Engine light on? ---
**Author:** ![renten10er](https://avatars.discourse-cdn.com/v4/letter/r/8e7dd6/32.png) [@renten10er](https://community.cartalk.com/u/renten10er)\ **Post date:** [November 28, 2018, 3:00pm UTC](https://community.cartalk.com/t/sometimes-van-engine-revs-and-then-all-trans-gears-slam/129794/3 "2018-11-28T15:00:23Z")
Thanks for responding. No check engine light. First can I lower the idle speed? Please remember at this time the idle is usually fine/smooth gear change. Will the attempted cure be worse than. The disease? ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [November 28, 2018, 3:19pm UTC](https://community.cartalk.com/t/sometimes-van-engine-revs-and-then-all-trans-gears-slam/129794/4 "2018-11-28T15:19:47Z")
Idle speed is controlled by the engine computer. What is needed is a systematic diagnosis to determine why the computer is getting it wrong. How bad was the damage from the rear end hit? Perhaps an emissions fitting at the gas tank was dislodged or damaged. ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [November 28, 2018, 4:00pm UTC](https://community.cartalk.com/t/sometimes-van-engine-revs-and-then-all-trans-gears-slam/129794/5 "2018-11-28T16:00:06Z")
If the attempted cure begins with an accurate diagnosis, no harm done. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [November 28, 2018, 4:03pm UTC](https://community.cartalk.com/t/sometimes-van-engine-revs-and-then-all-trans-gears-slam/129794/6 "2018-11-28T16:03:19Z")
> [@renten10er](#): > > As above Recently car backed into my 2006 Chevy Van Was there not an insurance claim involved . If there was then contact the other persons insurance and inform them you still have unresolved problems. ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [November 28, 2018, 4:32pm UTC](https://community.cartalk.com/t/sometimes-van-engine-revs-and-then-all-trans-gears-slam/129794/7 "2018-11-28T16:32:52Z")
A good collision center should be able to address the problems. Involve your insurance too, they may be able to help you deal with the other company. Hopefully you have a report from a law enforcement officer.