# Transmission redlines at 40mph

**URL:** <https://community.cartalk.com/t/transmission-redlines-at-40mph/139659>\
**Category:** Maintenance/Repairs\
**Tags:** transmissions, jeep\
**Created:** [May 2, 2019, 7:16am UTC](https://community.cartalk.com/t/transmission-redlines-at-40mph/139659 "2019-05-02T07:16:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Nickmac7969\_151504](https://avatars.discourse-cdn.com/v4/letter/n/a5b964/32.png) [@Nickmac7969\_151504](https://community.cartalk.com/u/Nickmac7969_151504)\
**Post date:** [May 2, 2019, 7:16am UTC](https://community.cartalk.com/t/transmission-redlines-at-40mph/139659/1 "2019-05-02T07:16:55Z")

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So I have a 2004 jeep grand Cherokee that whenever we drive it on normal drive it redlines by the time it hits 40mph and just loses speed, but when we drive it on 2nd it drives fine I can get to speeds of 60. I just need a second opinion thank you.

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**Author:** ![PvtPublic](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/pvtpublic/32/13089_2.png) [@PvtPublic](https://community.cartalk.com/u/PvtPublic)\
**Post date:** [May 2, 2019, 8:55am UTC](https://community.cartalk.com/t/transmission-redlines-at-40mph/139659/2 "2019-05-02T08:55:25Z")

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I think you need a transmission shop.

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**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\
**Post date:** [May 2, 2019, 6:11pm UTC](https://community.cartalk.com/t/transmission-redlines-at-40mph/139659/3 "2019-05-02T18:11:25Z")

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i think the dodge/jeep trans default is 2nd gear for issues. but it seems to stay in 1st gear when you use D but it goes to 2nd if you use “2”? so, your speedo is working and your tach is working. a trans shop can read codes for you

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**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\
**Post date:** [May 2, 2019, 6:42pm UTC](https://community.cartalk.com/t/transmission-redlines-at-40mph/139659/4 "2019-05-02T18:42:16Z")

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This might be simple: a sensor that screws into the side of the tranny, or its wiring. Good luck and please let us know.