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Old 03-18-2012, 09:02 PM   #1
shipma3
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1978 k10 gets wound up at between 55 and 60

the motor gets way wound up on the freeway at 55 or 60, i beleive it has either 373 or 411 gears, is there anything i can do sans putting another rear end underneath it. motor has tons of power just gets wound up at 60
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Old 03-18-2012, 09:14 PM   #2
INSIDIOUS '86
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Re: 1978 k10 gets wound up at between 55 and 60

You can not put a new rear end in and instead just do a overdrive transmission. So pick your poison lol
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Old 03-18-2012, 09:15 PM   #3
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Re: 1978 k10 gets wound up at between 55 and 60

overdrive, 4 speed manual (new process, not muncie) or higher rear end gears
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Old 03-19-2012, 11:39 AM   #4
Keith Seymore
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Re: 1978 k10 gets wound up at between 55 and 60

any of the above, or drive slower.



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Old 03-19-2012, 06:50 PM   #5
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Re: 1978 k10 gets wound up at between 55 and 60

lift and larger tires
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Old 03-19-2012, 08:09 PM   #6
76stepsidechevy
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Re: 1978 k10 gets wound up at between 55 and 60

Quote:
Originally Posted by AntiGov View Post
lift and larger tires
Thats the route I went. My truck is fairly happy on the highway now with 3.73s and 35s with the muncie 4 speed. When I got it it had 265/75r16s prob about a 31 or 32 and it screamed on the highway. Lost some power off the line but with the amount of highway driving I do with my truck it was worth it.
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Old 03-19-2012, 08:23 PM   #7
customisaak
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Re: 1978 k10 gets wound up at between 55 and 60

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Originally Posted by AntiGov View Post
lift and larger tires
Good call, my 4.10 th400, stock tire combo cost me a head gasket doing 4000rpm too long on the highway. i was too cheap for a lift but made the 37" toyos fit, now it loves the highway lost over 1000RPM
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