Author Topic: Gear ratio  (Read 158 times)

Offline Bob & Tracey

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Gear ratio
« on: October 12, 2019, 02:25:10 PM »
What gear ratio do I want in my 4104 with an 8V71 and V730?
Bob & Tracey Rice    Full timing until it is no longer fun.

1956 GMC PD4104-1611

Offline Geoff

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Re: Gear ratio
« Reply #1 on: October 12, 2019, 03:23:37 PM »
Can't say, but you must have a 4106 rear end in your 4104.  I have a 4.11 in my RTS and can go 80mph @ 2300 RPM's w/ 350HP 6V92TA.
Geoff
'82 RTS AZ

Offline Bob & Tracey

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Re: Gear ratio
« Reply #2 on: October 12, 2019, 03:29:40 PM »
Looks like stock was 4.125:1
Bob & Tracey Rice    Full timing until it is no longer fun.

1956 GMC PD4104-1611

Offline Bob & Tracey

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Re: Gear ratio
« Reply #3 on: October 12, 2019, 04:14:07 PM »
Geoff, yes it is a 4106 differential.
Bob & Tracey Rice    Full timing until it is no longer fun.

1956 GMC PD4104-1611

Offline Utahclaimjumper

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Re: Gear ratio
« Reply #4 on: October 12, 2019, 05:11:35 PM »

 Better known as 4.1/8th  The same ratio thats standard 06 with the 4 speed manual.>>>Dan
Utclmjmpr 
 EX 4106 (presently SOB)
Cedar City, Ut.
 72 VW Baja towed

Offline Utahclaimjumper

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Re: Gear ratio
« Reply #5 on: October 12, 2019, 05:11:56 PM »

 Better known as 4.1/8th  The same ratio thats standard 06 with the 4 speed manual.>>>Dan
Utclmjmpr 
 EX 4106 (presently SOB)
Cedar City, Ut.
 72 VW Baja towed

Offline TomC

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Re: Gear ratio
« Reply #6 on: October 13, 2019, 08:27:21 PM »
4.125 with 12R-22.5 (485rpm tires) with V730 (.88 overdrive). At 60mph you'll be turning 1760. Good Luck, TomC
Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.