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Max
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702 Posts
Discussion Starter · #1 ·
Recently installed 5:13 gears in my truck. I have a 2006 Chevy silverado 1500 4wd with a 12" FTS lift and 37x14 tires. My truck will not go over 65 miles per hour and once I get up to 65mph i start getting a vibrating feeling in my steering. How can I fix this so I can go faster on highways and stuff. Thanks.
 

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Yake is a Fgt
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3,582 Posts
What's your RPM's at 65? To be sure you aren't bouncing off the rev limiter
 

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Yake is a Fgt
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I hope you aren't serious
 

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Max
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702 Posts
Discussion Starter · #10 ·
3 so I'm in 4th. I'll be doing 65 try to go faster to pass a car and my truck will jump to 6000rpm and the motor will sound like it's falling on it's face and has no power. Driving normally in the city will shift flawlessly through all gears.
 

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Registered
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maybe I don't know what I'm talking about but 6000 RPM is the rev limiter or even a little less like 5700????

Mr. 960
 

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Giggity Giggity Giggity
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3,169 Posts
6000 rpm in 2nd would put you at 70 mph; 6000 rpm in 4th would put you at 184 mph. You should be turning around 2300 rpm at 71 mph, sounds like the trans or the tune is fucked.
 

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900 Posts
Shit do you actually run 65 constantly at 6k lol? My truck on 35s and 4.88s runs around 2800 at 65. With you running 37s you should be close to the same if not at a lower rpm than me.
 

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The Canadian
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ΜΟΛΩΝ ΛΑΒΕ
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8,527 Posts
Lol, take it out of 4lo...



5.13s and 37s on my truck, it cruised all day at 2300 rpm at 70mph.
 

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This place sucks dicks
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6000 rpm in 2nd would put you at 70 mph; 6000 rpm in 4th would put you at 184 mph. You should be turning around 2300 rpm at 71 mph, sounds like the trans or the tune is fucked.
With a .7 trans ratio for OD you should be about 2100 RPM
With a 1.00 trans ratio, 3rd gear I think, should be about 3000 Rpm
http://www.ringpinion.com/Calculators/Calc_RPM.aspx
You must have some other problem.
Are you positive it's shifting? How sure are you the torque converter is locked?
Yeah! Science BITCH!
 
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