# Truck transmission **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [November 25, 2019, 4:27am UTC](https://community.cartalk.com/t/truck-transmission/153489 "2019-11-25T04:27:07Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Andrew\_Morgan](https://avatars.discourse-cdn.com/v4/letter/a/50afbb/32.png) [@Andrew\_Morgan](https://community.cartalk.com/u/Andrew_Morgan)\ **Post date:** [November 25, 2019, 4:27am UTC](https://community.cartalk.com/t/truck-transmission/153489/1 "2019-11-25T04:27:07Z")
I have a 1996 gmc Sierra 2 wheel drive with the 5.7 engine and I just had the transmission rebuilt and it switches into overdrive about 30 to 35 mph and I was wandering what will make it do that and if it will hurt the transmission? ---
**Author:** ![Scrapyard-John](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@Scrapyard-John](https://community.cartalk.com/u/Scrapyard-John)\ **Post date:** [November 25, 2019, 4:40am UTC](https://community.cartalk.com/t/truck-transmission/153489/2 "2019-11-25T04:40:28Z")
Seems like that’s about 10 mph or so early for it to go into overdrive, even under light throttle. What does it do under heavy throttle? Personally, I think I’d take it back to the builder. ---
**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 25, 2019, 1:20pm UTC](https://community.cartalk.com/t/truck-transmission/153489/3 "2019-11-25T13:20:09Z")
> [@Andrew\_Morgan](#): > > I was wandering I wonder why you were wandering . And why ask this on the web when this rebuilt transmission has some kind of warranty . The rebuilder is the place to ask. ---
**Author:** ![Scrapyard-John](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@Scrapyard-John](https://community.cartalk.com/u/Scrapyard-John)\ **Post date:** [November 25, 2019, 4:45pm UTC](https://community.cartalk.com/t/truck-transmission/153489/4 "2019-11-25T16:45:48Z")
Well, it is a car talk forum. And it is a legitimate question about a car… Sometimes I wonder which questions people wander in here and ask you’d deem appropriate.