# 99 jeep

**URL:** <https://community.cartalk.com/t/99-jeep/20003>\
**Category:** Maintenance/Repairs\
**Created:** [September 25, 2008, 11:57pm UTC](https://community.cartalk.com/t/99-jeep/20003 "2008-09-25T23:57:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Steeler\_Fan](https://avatars.discourse-cdn.com/v4/letter/s/ba8739/32.png) [@Steeler\_Fan](https://community.cartalk.com/u/Steeler_Fan)\
**Post date:** [September 25, 2008, 11:57pm UTC](https://community.cartalk.com/t/99-jeep/20003/1 "2008-09-25T23:57:00Z")

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years ago when car had points i was an auto mechanic so i like to think i know a little however my jeep has a transmision problem if i pull out slowly it shifts up and back down as i know it should not do. it does not slip yet any way years ago i would have sovled this by changing the vacum modulator but having already been under the car i do not see one i am guessing these are now electronic if so are they something i can change myself or not.

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**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\
**Post date:** [September 26, 2008, 6:03am UTC](https://community.cartalk.com/t/99-jeep/20003/2 "2008-09-26T06:03:12Z")

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I have seen a few Jeeps with faulty TPS sensors causing this problem. Is this a Jeep Cherokee?