3.73 making speedo off
09-30-2009, 06:08 PM
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3.73 making speedo off I have a 3.73 gears in my 93 z28 and the speedo is of course off. I tried to get it fixed through the process of the chip but since it is a 93 it cant be done like that. I am told that I can get something that goes in my rear end that will fix my problem but I dont know what it is or where to get one.
09-30-2009, 06:16 PM
#4
I have a 3.73 gears in my 93 z28 and the speedo is of course off. I tried to get it fixed through the process of the chip but since it is a 93 it cant be done like that. I am told that I can get something that goes in my rear end that will fix my problem but I dont know what it is or where to get one.
I couldn't help but laugh at that statement.
10-01-2009, 11:01 AM
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10-01-2009, 12:23 PM
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I dont think its too hard. prity much wat it dose is you cut the speedo wire and you hook it up to this. so it looks like this pcm-----dokota----speedo. the only tricky part is that its got like 4 slots so your not exactly sure witch to hook it up to. what i do is i get a friend to drive next to me and tell me how fast he is going while I use the *** on it to increase and decrease the speed on the speedo. if it still dosn't work i pull over and try a different slot and do the same thing over again till you find the one it needs. simple really.
10-03-2009, 11:41 PM
#10
All you have to do is get a new drive and driven gear for the transmission. Total of like $20. Just pop off the tailshaft housing and go at it. Did you go from 2.73s to 3.73s? You will need a 15 tooth drive gear and a 44 tooth driven gear I believe. I did the same thing.
10-04-2009, 12:54 AM
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All you have to do is get a new drive and driven gear for the transmission. Total of like $20. Just pop off the tailshaft housing and go at it. Did you go from 2.73s to 3.73s? You will need a 15 tooth drive gear and a 44 tooth driven gear I believe. I did the same thing.
Speaking of which, what tranmissions does he have?
10-04-2009, 03:00 PM
#13
Well I hope he wouldn't swap from 3.42's to 3.73's for a 6 speed, but if its a M28 or whatever that came with the 2.73's, its understandable... I just assumed it was an auto since he went to 3.73's.
10-05-2009, 12:13 AM
#15
Mine was off by about 30%. I didn't correct it for a good 6 months either... so 80 mph on the highway = 3500 rpms since the car thought i was going about 110.. needless to say I didn't take the highway very often.
