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Old 06-01-2012, 15:47   #1 (permalink)
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Another Speedo Problem

I have a half ton 4X4 whose major components span from '73 to '93. The transfer case is out of an '88 (Borg Warner 1356F). Here's my issue: the original speedometer gear on the cable was worn to the point that the speedo didn't even move. I went through the best calculations I could and came up with 22 teeth. With the new, it jumps a little as I come up to 30, bounces a lot when I shift, then tracks way low from 40 on up. The worm gear kinda looks worn, was planning on replacing it, since I'm assuming that the change in thrust is causing the bouncing. Am I on the right track? And how much of a pain is it to get this out? I'd just leave well enough alone, but my wife wants her Garmin back and my lead foot and insurance company tell me I need to know how fast I'm going. Besides, the butterfly stickers she has on the back are a little emasculating.
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Old 06-01-2012, 17:11   #2 (permalink)
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Re: Another Speedo Problem

How does the cable look? sometimes they get a little bend at the end and cause that, It should pull out from the bottom.
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Old 06-01-2012, 17:37   #3 (permalink)
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Re: Another Speedo Problem

Feels free, I was going to try and clamp a drill to it while someone's watching the actual dial, but from the feel of things and what I watched while I drove it, that route doesn't look promising
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Old 06-03-2012, 13:23   #4 (permalink)
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Re: Another Speedo Problem

Ok, I pulled the cable out of the differential and attached a drill to it, it maintained a steady speed of about 60 mph with no bounce. Ordered an 8 tooth to replace the gear in the transfer case, anyone have any idea what I'm in for? It looks like I should be able to pop the tail piece off and, my guess, pull a snap ring and it should slide right off.

Don't mind me, I had the bright idea to rebuild a C-6 tranny once without prior research and found out that it's a little more involved than I thought.

I hate surprises.
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