From dkautz@hpsidms1.sid.hp.comMon Feb 6 12:53:12 1995 Date: Mon, 23 Jan 95 11:49:59 CST From: Dave Kautz Reply to: vanagon@lenti To: Multiple recipients of list Subject: Re: [Q] Decreasing gear ratio > > I don't remember seeing this discussed anywhere, so does anyone know > if replacement gears are available for my tranny to lower the revs at > 60 mph? It seems criminal to make that poor engine turn 4000 rpm at 60 > when the torque at 3000 rpm is probably sufficient for the job. It's > nice to have the real low first gear for jeep roads in the mountains, > but in the flats I wind through the gears pretty fast. The ultimate > solution would be a five-speed tranny. Are there any possibilities > here? Or were the German engineers pretty smart when they designed the > factory gearing? > > ..Dave Phillips '69 bus | Internet: phillips@aries.tucson.saic.com > > Heres a copy of the now infamous wear index which includes the ratio in 4th and the final drive ratio for the gearboxes you might be interested in. Unfortuneatly, the "mountain gears" mentioned in Haynes are not included in the wear index. VW Bus Relative Wear Index Year | Top Gear | Final Drive | Engine Revs | Stroke | Piston Travel | Ratio | Ratio | /Mile | | /Mile ________________________________________________________________________ Micro | | | | | 1200 | 0.82 | 4.125 x 1.39 | 3719 | 64mm | 1571 ft. Micro | | | | | 1500 | 0.82 | 4.125 x 1.26 | 3371 | 69mm | 1525 ft. Micro | | | | | 1 ton | 0.82 | 4.375 x 1.26 | 3575 | 69mm | 1618 ft. | | | | | 68-71 | 0.82 | 5.375:1 | 3484 | 69mm | 1577 ft. 72-73.5 | 0.82 | 5.375:1 | 3484 | 66mm | 1509 ft. 73.5** | 0.89 | 5.375:1 | 3781 | 66mm | 1637 ft. 74-75 | 0.89 | 4.857:1 | 3416 | 66mm | 1479 ft. 76-79 | 0.82 | 4.857:1 | 3181 | 71mm | 1481 ft. 79-82 | 0.85 | 4.570:1 | 3072 | 71mm | 1431 ft. Dsl/4 | 0.85 | 5.428:1 | 3650 | 86.4mm | 2069 ft. Dsl/5 | 0.77 | 5.428:1 | 3306 | 86.4mm | 1874 ft. 83-85 | 0.85 | 4.830:1 | 3267 | 69mm | 1479 ft. 86-91 | 0.85 | 4.830:1 | 3267 | 76mm | 1629 ft. Syncro | 0.85 | 5.428:1 | 3650 | 76mm | 1820 ft. Auto. 1.9| 1.00 | 4.090:1 | 3235 | 69mm | 1464 ft. * Auto. 2.1| 1.00 | 4.090:1 | 3235 | 76mm | 1613 ft. * EV 5 cyl.| 0.76 | 4.610:1 | 2743 | 95.5mm | 1719 ft. EV 4 cyl.| 0.76 | 4.940:1 | 2939 | 95.5mm | 1841 ft. 79-82 w/ | | | | | <=2.2 911| 0.85 | 4.570:1 | 3072 | 66mm | 1330 ft 79-82 w/ | | | | | 2.4,7 911| 0.85 | 4.570:1 | 3072 | 70.4mm | 1419 ft ** From chassis # 2x3 2068 548 * These numbers should be increased by 5-10% due to torque converter slip Dave Kautz dkautz@hpsidms1.sid.hp.com