90 GMC, 8.2 Liter, Eaton Rear, 22 inch tires, Increase Highway Speed.

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90 GMC, 8.2 Liter, Eaton Rear, 22 inch tires, Increase Highway Speed.

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All Messages in Thread	Author	Date
90 GMC, 8.2 Liter, Eaton Rear, 22 inch tires, Increase Highway Speed.	Salem United Methodist Church	1-16-07
We have a 1990 GMC, with a Eaton Rear end model number "190505 model 1", and a five speed manual transmission. How is the best way to make this bus cruise safely at 65 MPH? It does about 53 now. Thanks for any advice you can give.
Re: 90 GMC, 8.2 Liter, Eaton Rear, 22 inch tires, Increase Highway Speed.	TBB Fan	1-24-07
I suspect the transmission is a direct. You could swap out the direct transmission for an overdrive. The only other option would be to change out the ratio of the rear axle and go to something shallower. This would scarifice some of your startability though.