my truck is reving up and down while in 5th i have heard of this called hunting??

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my truck is reving up and down while in 5th i have heard of this called hunting??

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Chevrolet Forum >> Chevy Trucks, Vans & SUV's >> S-10 & Blazer >> my truck is reving up and down while in 5th i have heard of this called hunting??

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my truck is reving up and down while in 5th i have hear... - 3/8/2008 3:25:41 PM

lil_racer_76

Posts: 5
Joined: 3/6/2008
Status: offline

it seems like when im in 5th gear going 60,70,80,90 and sometiems 100 kms my truck idles up and down a few grand like 3rpm sometimes like 5rpm if its doing it really bad doesnt do it as much if my truck is cold and never noticed it doing this if i put it into number 3 just in overdrive it does it does anyone have any ideas as to what this could be? its a 1999 chevy s10 zr2

Post #: 1

RE: my truck is reving up and down while in 5th i have ... - 3/8/2008 5:17:02 PM

2tallcustomz

Posts: 83
Joined: 3/6/2008
Status: offline

is an automatic or manual

(in reply to lil_racer_76)

Post #: 2

RE: my truck is reving up and down while in 5th i have ... - 3/8/2008 11:04:11 PM

lil_racer_76

Posts: 5
Joined: 3/6/2008
Status: offline

automatic 4x4

(in reply to 2tallcustomz)

Post #: 3

RE: my truck is reving up and down while in 5th i have ... - 3/9/2008 12:37:21 PM

2tallcustomz

Posts: 83
Joined: 3/6/2008
Status: offline

if it is only doing it overdrive it could be the servos for that gear going out. if its not catching all the way or slipping it will cause the engine to rev higher to try and maintain the speed you are going. i would have the transmission looked at

(in reply to lil_racer_76)

Post #: 4

RE: my truck is reving up and down while in 5th i have ... - 3/10/2008 7:22:11 PM

lil_racer_76

Posts: 5
Joined: 3/6/2008
Status: offline

what do you mean by the servos?

(in reply to 2tallcustomz)

Post #: 5

RE: my truck is reving up and down while in 5th i have ... - 3/11/2008 9:55:05 AM

2tallcustomz

Posts: 83
Joined: 3/6/2008
Status: offline

with the 700r4 and any eltronically controlled transmission there are things called servos. the job of the servo is to shift the transmission into the gear you have selected. if a servo is not working properly it will not shift the gear either all the way which would cause you high rpms or not shift at all.

(in reply to lil_racer_76)

Post #: 6