Speedometer problems - M35a2

[fkowalski1942]

Hello All,

My M35a2 shows in speedometer about 60miles just in third gear, but the truck is running below 20 MPH... Anyone experienced this problem before?
I purchased the speedometer from an SS Member, looks like ok but with the cable attached it shows a completely wrong speed.
Anyone can tell me the ratio of the speedo gears in the Transfer-case?

In my truck theres one part threaded in the TC hull and another threaded in these first piece who make a 90º turn, has an grease hole, and is threaded to the speedo cable.

Thanks for your help!

 

[Dhallftworth]

Mine does the exact opposite. Maybe it was calibrated for larger tires.

 

[Jeepsinker]

Mine is set up the same but works fine. Sounds like you both have bum speedometers. I would imagine this could happen if someone opened one up and tried to fiddle with the guts/ rebuild it incorrectly, or if it is a Chinese made one.

 

[gimpyrobb]

nah, the drive in the t case has the wrrong drive ratio in it.

 

[welldigger]

If you have the factory speedo drive and over sized tires your speedo will clock slower than actual road speed. I wonder if you have a 5 ton speedometer drive.

 

[gimpyrobb]

the 5ton woud slow it down as the smallest tire would be an 1100.