Re: Help,.. Highway final ratio for my D-300

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I recently purchased a rust free 68 D 300 which has had only one owner since early seventies. It has 52,000 original. . Strong 318 with NP 435 4 speed. Love this flatbed and the way it drives.!! ( up to 52 mph ) I want to refresh this D 300 and it will soon replace my existing newer dually. This D3

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Re: Help,.. Highway final ratio for my D-300

Posted by: swptln (Moderator)
Posts: 963

Date: May 26, 2015 09:41PM

L78/16 tires are around 30" tall and with 5.78 gears @ 1.1 final drive would be 3600 rpms @ 56 mph
3.55 gears and L78's would be 2200 rpms @ 56 mph or 2500 rpms @ 65 mph.
4.11 gears and L78's would be 2900 rpms @ 65 mph.

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Mark D.

1968 W200 Sweptline
1969 D100 Utiline
1971 D100 SE Sweptline
1993 D250 Club Cab Sweptline
1986 W250 Cab & Chassis
1978 D300 Sweptline

E. Brookfield, Massachusetts

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Subject	Views	Written By	Posted
Help,.. Highway final ratio for my D-300	1545	Gordo	05/24/2015 02:48PM
Re: Help,.. Highway final ratio for my D-300	577	PwrWgnDrvr	05/24/2015 09:35PM
Re: Help,.. Highway final ratio for my D-300	536	Gordo	05/26/2015 08:11PM
Re: Help,.. Highway final ratio for my D-300	649	swptln	05/26/2015 09:41PM
Re: Help,.. Highway final ratio for my D-300	582	Gordo	05/27/2015 10:07AM
Re: Help,.. Highway final ratio for my D-300	528	Gordo	05/27/2015 10:16AM
Re: Help,.. Highway final ratio for my D-300	568	Gordo	05/31/2015 05:23PM
Re: Help,.. Highway final ratio for my D-300	590	little doug	06/01/2015 11:32PM
Re: Help,.. Highway final ratio for my D-300	516	Gordo	06/02/2015 10:23AM
Re: Help,.. Highway final ratio for my D-300	542	little doug	06/03/2015 01:30AM
Re: Help,.. Highway final ratio for my D-300	761	Gordo	06/03/2015 06:55AM