Posted by David Blodgett on November 13, 1998 at 11:15:33:
In Reply to: Re: Bad Vibes..... posted by Brian on November 13, 1998 at 10:15:51:
The easiest way to get the gear ratio is to put a jack under the pumpkin, and block the front wheels really good. Put the car in neutral. Mark the position of the drive shaft to something stationary. Then turn the rear wheels one full revolution and count the number of times the driveshaft turns. (If it is easier turn the rear wheels 10 times to get a more accurate number, then just divide by ten.)
: Yeah, I knew why the speedo was wrong. I just forgot to ask if anyone out there knew how to calculate gear ratios using tire dia. rpm's etc....
: : After a little more thinking, there is no doubt that the reason your spedo is wrong, is that when the previous owner switched rear gears, they didn't switch the spedo gear in the tranny. One reason for the play in the rear might be that it wasn't shimmed properly.
: : : OK, thanks for all of the suggestions, guys. Guess I'll start at the tranny mount (easiest) and eliminate the easy items first. Dumb question time though, where can I get one? Is this a bone yard item or do they sell 'em new? Thanks again!!!
: : : :
: : : : Have a problem creeping up that I am unsure of the exact origin. Due to lots of noise and vibration while driving, I took a gamble and replaced botn u-joints. This solved most of the noise and vibration. However, at speeds around 75-80, the vibration comes back REALLY strong. At 65 it is not noticable. The one thing that I did notice while working on the u-joints was that when I grab the differential yoke, it has about an 1/8 inch of radial play in it. I do not know if this is too much. I do not know how many miles the rear end has. The previous owner changed rear ends to get a stouter gear and since the ID tag is missing I have no idea what gear it has. I do know that the speedo is 15 mph fast. Anyone have any ideas???
: : : : p.s. tires are a little worn....