GMC/Ward Gearing for Highway

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GMC/Ward Gearing for Highway

Home > Discussion Forum > Mechanic's Corner - Transmissions

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All Messages in Thread	Author	Date
GMC/Ward Gearing for Highway	Dod	6-13-01
I am interested in using my '79 GMC/Ward Automatic 11 passenger bus to do some traveling. The gearing is too low so I am looking into the following three options: 1. Change transmission 2. Add overdrive unit 3. Replace differential gears. Any opinions or insight? The rear end has 10 bolts in a circular pattern with the driveshaft offset towards the passeneger side. The cover also has "699" cast into it. When I jack up one wheel, the driveshaft rotates about 6.2 times. Can anyone provide info on what kind of rear end I have and what other gears sets are available? Also what would be a ballpark estimate on changing the gears? Any input would be appreciated. Thanks.
Re: GMC/Ward Gearing for Highway	FAST FRED	6-14-01
The lowest cost method is usually to find a complete rear from the boneyard , with a much better ratio and install it. IF you can find a 2 speed , you might get lucky and have a highway cruser , that can handle rough dirt roads too. Cost of thr rear isnt too high but good mechanics dont come cheap. I would suggest the local truck spring rebuilders as they have most experience with this. FAST FRED
Re: GMC/Ward Gearing for Highway	FAST FRED	6-14-01
The lowest cost method is usually to find a complete rear from the boneyard , with a much better ratio and install it. IF you can find a 2 speed , you might get lucky and have a highway cruser , that can handle rough dirt roads too. Cost of thr rear isnt too high but good mechanics dont come cheap. I would suggest the local truck spring rebuilders as they have most experience with this. FAST FRED

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