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**pjmoreland** · 05-28-2005, 02:08 AM

The speedometer gear webpage listed above has moved:

http://www.73-87.com/7387garage/drivetrain/speedo.htm

I suggest using the formula listed in the link instead of going off the table. I found that the value in the table that corresponded to my setup was incorrect.

For my SWB 2WD truck with the engine in the forward position, and with stock suspension, the driveshaft length ended up being 56 1/4" long measured from u-joint to u-joint.

The stock GM vacuum switch for controlling the TCC is part number 14032087, and the vacuum delay valve that goes in between the vacuum switch and the vacuum source is part number 14020691.

05-28-2005, 02:08 AM	#11
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,301	The speedometer gear webpage listed above has moved: http://www.73-87.com/7387garage/drivetrain/speedo.htm I suggest using the formula listed in the link instead of going off the table. I found that the value in the table that corresponded to my setup was incorrect. For my SWB 2WD truck with the engine in the forward position, and with stock suspension, the driveshaft length ended up being 56 1/4" long measured from u-joint to u-joint. The stock GM vacuum switch for controlling the TCC is part number 14032087, and the vacuum delay valve that goes in between the vacuum switch and the vacuum source is part number 14020691. Attached Images Last edited by pjmoreland; 05-28-2005 at 02:09 AM.