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#15273 10/07/2003 6:30 PM | Joined: Jan 2001 Posts: 687 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 687 | I guess this is to be expected. In my 1966 Chevrolet stepside p/u, the speedometer now doesn't work with the new 4 speed OD transmission. I'm still using the original 3 speed tranny cable.
I said the speedometer "doesn't work" but that's not exactly accurate. It works but doesn't register the correct speed. It wavers around all over the place. Do I need to replace the speedo cable? Get a new speedometer from a mid 80s truck? Or what?
-ftyler | | |
#15274 10/07/2003 11:47 PM | Joined: Feb 2002 Posts: 2,893 Socket Breaker | | Socket Breaker Joined: Feb 2002 Posts: 2,893 | ftyler, I havent' changed my tranny - but someone did before I got mine - the post I started is still here in the Engine/Driveline shop... Topic: odometer/speedometer gear math... some of the other 'Bolters chimed in with some things... maybe some of it can give you a clue or a start... I'm still trying to sort it all out myself.  -W | | |
#15275 10/08/2003 12:53 AM | Joined: Jan 2001 Posts: 613 Member | | Member Joined: Jan 2001 Posts: 613 | did it waver with the old trans?could the inner cable be too long and pushing against the back of the speedometer causing it to bind? | | |
#15276 10/08/2003 1:00 AM | Joined: Jan 2001 Posts: 687 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 687 | It was very steady with the previous tranny (the original 3 speed). Just started acting up with the new 4 speed OD. Any clues? | | |
#15277 10/08/2003 3:16 AM | Joined: Jul 2002 Posts: 68 Member | | Member Joined: Jul 2002 Posts: 68 | Disconnect the speedo cable at the trans and spin it with your fingers to see if it spins freely. You could also hook up a drill to the cable and turn it to see if the speedometer bounces. The drill has to spin counter-clockwise in order for this to work. If everything is O.K. it might be the drive gear on the main shaft.
'54 3100-235-T5 trans-12 bolt 3:31
'68 Impala 307/350
'78 Sportster/Original owner
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#15278 10/08/2003 9:24 AM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | It's easy to pinch the cable housing when you are moving things around down there, or not get it screwed into the transmission right. Try pulling it out and putting it back in, and lubricating it with a little graphite and see if that helps.
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A lone amateur built the Ark. A large group of professionals built the Titanic. | | |
#15279 10/08/2003 2:10 PM | Joined: Jan 2000 Posts: 1,586 Extreme Gabster | | Extreme Gabster Joined: Jan 2000 Posts: 1,586 | Yeah,check out the cable first.The speedo driven gear on the A833 is a plastic gear, the retainer is eccentric shaped, make sure it's not positioned incorrectly and binding the gear.After installing the A833 in our 51 truck, the speedo was way slow. I couldn't find the proper gear for correction so I had an adapter made by an speedo shop who advertises online,The Guage Guys.50 bucks,fast service, accurate speedo. | | |
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